Answers
Chemical bonds involve the interaction between nuclei and electrons. Option D.
Chemical bondsChemical bonds are formed through the interaction between atoms, where electrons in the outermost energy level (valence electrons) are shared, gained or lost between atoms.
This results in the formation of a more stable compound. In these interactions, the positively charged nucleus of each atom attracts the negatively charged electrons of the other atom, creating a bond.
The strength of the bond is determined by the distance between the nuclei and the number of electrons shared between them.
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Related Questions
look back at parts A and B to compare the properties of the unknown elements with the properties of the unknown elements. Based ok these properties, match each unknown element to its group in the periodic table. Drag each tile to the correct box .
Answers
The periodic chart is a tabular collection of chemical elements arranged according to atomic number, starting with hydrogen and going up to oganesson, which has the greatest atomic number.
What is the periodic table?In the periodic table, also referred to as the periodic chart of the (chemical) elements, the chemical elements are organised in rows and columns. It is frequently used in physics, chemistry, and other academic fields and is widely recognised as a sign of chemistry.
This is a visual representation of the periodic law, which states that the properties of molecular elements depend approximately periodically on their atomic numbers. There are four roughly rectangular "pieces" that make up the table's top.
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Over the years, land used for grain production in this village has been subjected to aggressive farming practices such as over-watering and plowing. How have these activities most likely affected the land?
ANSWER PLS
Answers
Over-watering and aggressive plowing can have a variety of negative effects on the land used for crop production.
How are these activities likely to have impacted the land?
Some potential consequences of these practices include:
Soil erosion: Over-watering can cause soil erosion, which occurs when water runs off the land too quickly and carries soil particles with it. Aggressive plowing can also contribute to soil erosion by disturbing the soil structure and making it more susceptible to erosion.Soil compaction: Aggressive plowing can compact the soil, making it more difficult for plants to grow and for water and nutrients to penetrate the soil.Soil nutrient depletion: Over-watering can leach nutrients out of the soil, which can make it more difficult for plants to grow. Aggressive plowing can also contribute to soil nutrient depletion by disturbing the soil structure and breaking down organic matter.Reduced biodiversity: Over-watering and aggressive plowing can reduce biodiversity by destroying habitats and reducing the number of beneficial microorganisms and insects in the soil.Overall, these activities can have a negative impact on the health of the land and reduce its productivity over time. To mitigate these effects, it may be necessary to adopt more sustainable farming practices, such as conservation tillage and crop rotation, that help to preserve the health of the soil and maintain its productivity.
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What physical and chemical changes can happen in an aquaponics system
Answers
In aquaponics, the ammonia present in water is converted into nitrates which is used by the plants as a nutrients which is a chemical change. When the mass is converted into energy, it increases the temperature of the ecosystem and also the earth surface indicating a physical change.
What is a chemical change?
Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
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How many liters of O2 will be produced at a temperature of 12.43 degrees Celsius and 941.34 kPa if 37.25 grams of KCIO, decompose according to the following balanced equation:
2KCIO3
---> 2KCI + 30,(g)
Round your answer to three decimal places.
Answers
To solve this problem, we first need to use stoichiometry to determine the number of moles of O2 produced by the decomposition of 37.25 grams of KCIO3.
From the balanced equation, we know that 2 moles of KCIO3 decompose to produce 3 moles of O2. Therefore, we can use the molar mass of KCIO3 to convert 37.25 grams to moles:
37.25 g KCIO3 x (1 mol KCIO3/ 122.55 g KCIO3) = 0.3032 mol KCIO3
Using the stoichiometry of the balanced equation, we can convert the moles of KCIO3 to moles of O2:
0.3032 mol KCIO3 x (3 mol O2/ 2 mol KCIO3) = 0.4548 mol O2
Now that we know the number of moles of O2 produced, we can use the ideal gas law to calculate the volume of gas produced at the given temperature and pressure.
V = nRT/P
Where:
V = volume of gas (in liters)
n = number of moles of gas
R = ideal gas constant (0.0821 L·atm/K·mol)
T = temperature (in Kelvin)
P = pressure (in atm)
First, we need to convert the temperature to Kelvin:
12.43°C + 273.15 = 285.58 K
Now we can substitute the values into the ideal gas law equation:
V = (0.4548 mol)(0.0821 L·atm/K·mol)(285.58 K)/(941.34 kPa/101.325 kPa/atm)
V = 0.0151 L or 15.1 mL (rounded to three decimal places)
Therefore, 37.25 grams of KCIO3 will produce 15.1 mL of O2 at a temperature of 12.43°C and 941.34 kPa.
Pennies minted after 1982 are made of mostly zinc and are coated with a bit of copper. Describe what you would have to do to find the percent composition by mass of a penny. What would you need to know, and what would you do with that information
Answers
Knowing each element's mass and molar mass allows one to compute the percentage of zinc and copper that is present in a coin.
Why do you use the term "molar mass"?The mass in grams from one mole of a chemical is its molar mass. A mole is the measurement of the number of things, such as atoms, molecules, and ions, that are present in a substance. Any material has 6.022 x 1023 molecules in a mole.
What is a molar mass, exactly?A substance's molar mass is the volume of the material that contains one mole of the substance. Its basic definition seems to be the weight of a single mole of a substance. The atomic mass of the each substance then multiplied by the subscript of such a element inside the chemical formula to determine the molar mass.
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What is the correct answer please help me
Answers
In the above question regarding metals and conductors, I is false and II is true (option B).
What is a conductor?A conductor is a something that can transmit electricity, heat, light or sound.
Metallic elements or solids are excellent conductors of electricity and heat because their atoms form a matrix through which outside electrons can easily move.
Instead of orbiting their individual atoms, they generate a sea of electrons around the positive nuclei of the interacting metal ions.
Therefore, statement I is false while II is true.
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HELP PLEASEEEE
Which planet is made of frozen gas, rock, and dust.It can have a "tail" when it gets close to the sun?
Answers
The planet you are referring to is not a planet, but a celestial object called a comet. Comets are made up of frozen gas, rock, and dust and can develop a visible "tail" when they get close to the sun due to the heat causing the ice to vaporize and release gas and dust particles.
Use the information in the table to calculate AS
for each of these reactions. Round all answers to
nearest whole number
Answers
The change in entropy for each reaction is;
1) -198 J/mol
2) -5 J/mol
3) -148 J/mol
What is the change in entropy?
The change in entropy, denoted as ΔS, is a measure of the amount of disorder or randomness in a system before and after a process or reaction. It is defined as the difference between the entropy of the final state and the entropy of the initial state.
The formula for calculating the change in entropy is:
ΔS = S_final - S_initial
where ΔS is the change in entropy, S_final is the entropy of the final state, and S_initial is the entropy of the initial state.
We have that;
1) 2(192.5) - [3(130.58) + 191.50]
= 385 - [391.74 + 191.50]
= -198 J/mol
2) [213.6 + 2(188.83] - [186.3 + 2(205]
= -5 J/mol
3) 2(220) - [2(191.50) + 205]
-148 J/mol
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Point out which of your chosen scientist’s contributions are present in the modern atomic model and which were eventually disproven and thus are not part of the modern model
Answers
The scientist I have chosen is J.J. Thomson, who made significant contributions to the study of atomic structure in the late 19th and early 20th centuries.
Thomson's most well-known contribution is his discovery of the electron, which he identified as a negatively charged particle present in all atoms. This discovery formed the basis of Thomson's "plum pudding" model of the atom, which proposed that atoms consisted of a positively charged "pudding" with negatively charged electrons scattered throughout.
While this model was eventually disproven, Thomson's discovery of the electron and his work on the measurement of atomic and molecular masses laid the foundation for the modern atomic model. Specifically, Thomson's work on mass spectrometry led to the development of more advanced techniques for determining the masses and properties of atoms and molecules, which are still used in modern research today.
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4. In an experiment, 170.9 g of C_{2}*H_{4} was reacted with 52.75L of , 64.1 g of C*O_{2} is produced .What is the limiting reagent? ) What is the percent yield of this reaction?
Answers
The reagent which is completely consumed in a reaction and thereby limits how much product can be formed is called the limiting reagent. Here the limiting reagent is O₂.
What is percent yield?The quantity of the product which is actually made compared with the maximum calculated yield is defined as the percent yield. The percent yield is the ratio of the actual yield to the theoretical yield.
% Yield = Actual yield / Theoretical yield × 100
The number of moles (n) = Given mass / Molar mass
'n' of C₂H₄ = 170.9 / 28.05 = 6.09 mol
'n' of O₂ = 64.1 / 31.9 = 1.65 mol
So O₂ is the limiting reactant.
Theoretical yield of CO₂ is:
170.9 × 1 mol / 28 g × 2 mol / 1 × 44/1 = 537.1 g CO₂
%Yield = 64.1 / 537.1 × 100 = 11.93 %
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Your question is complete most probably your full question was:
In an experiment, 170.9 g of C_{2}*H_{4} was reacted with 52.75g of O₂, 64.1 g of C*O_{2} is produced .What is the limiting reagent? ) What is the percent yield of this reaction?
Do you think that everyone in your community has access to adequate sanitation? Why or why not?
Answers
HELP ME PLSSSS!!!!!!!
You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)
O The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.
O The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.
O The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.
O The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.
Answers
The modified circuit can no longer boil water because: "The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates.Therefore, the correct option is D.
What is electrical energy?Electrical energy is a form of energy that results from the movement of charged particles, such as electrons. It is the energy that is transferred when an electric current flows through a conductor, and can be converted into other forms of energy, such as heat, light, or mechanical energy.
When a second load is connected, the circuit's electrical power is now split between two hot plates. Because of this, each hot plate uses less electricity and cannot produce as much heat.Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,\
You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)
A. The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.
B. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.
C. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.
D. The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.
What type of solution would you have if you have a sealed container with 100g of
water and 0.15g of dissolved CO2 at 40°C?
unsaturated
saturated
supersaturated
Answers
The type of solution would you have if you have a sealed container with 100g of water and 0.15g of dissolved CO₂ at 40°C is a saturated solution.
What is saturated solution?
A saturated solution is a solution that has dissolved as much solute as it is capable of dissolving. In a saturated solution, no more solute can be dissolved at a given temperature. We can make an saturated solution by keep on dissolving solute until no more solute can be dissolved.
Given,
mass of water = 100g
mass of dissolved CO₂ = 0.15g
Solubility = (weight of solute ÷ weight of solvent)×100
Solubility = (0.15 ÷ 100)×100 = 0.15g
Therefore, the type of solution would you have if you have a sealed container with 100g of water and 0.15g of dissolved CO₂ at 40°C is a saturated solution.
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Answer:
saturated
Explanation:
3. Use the following masses of reactants and products to write balanced symbol equations.
a) 4.40 g of propane (C3H8) reacts with 16.0 g of oxygen to produce 13.2 g of carbon dioxide and 7.20 g of water.
b) 46.0 g of ethanol (C2H5OH) reacts with 112.0 g of oxygen to produce 88.0 g of carbon dioxide and 54.0 g of water.
c) 79.2 g of C14H30 is cracked to produce 40.0 g of C7H16, 17.6 g of C3H8 and 22.4 g of C₂H4.
Answers
Using the masses of reactants and products the balanced chemical equations are:
a)C₃H₈ + 5O₂ ⇒ 3CO₂ + 4H₂O
b) C₂H₅OH + 3O₂ ⇒ 2CO₂ + 3H₂O
c) C₁₄H₃₀ ⇒ C₇H₁₆ + C₃H₈ + 2C₂H₄(cracking)
What is balanced chemical equation?Equations are balanced when they have the same number of each element on both the reactant and product sides. Equations need to be balanced in order to express the conservation of mass rule appropriately.
To balance chemical equations, stoichiometric coefficients for the reactants and products are necessary. Because a chemical equation must adhere to the rules of conservation of mass and constant proportions, the reactant and product sides of the equation must have an equal number of atoms of each element.
What is cracking?Long chain hydrocarbons, also known as kerogens, are complex chemical molecules that can be broken down into lighter, simpler molecules by a process called cracking. It results from the dissolution of carbon-carbon bonds. The presence of a catalyst and temperature are two elements that have a significant impact on the catalyst rate.
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does lead melt into individual atoms or molecules?
Answers
Lead cannot melt at such level, hence it cannot break down into individual atoms or molecules. A change in the bonding of atoms or molecules is referred to as melting.
Lead melts, but how does its molecular structure change?The metallic connections are broken and the atoms are made more mobile by the energy needed to melt the metal. Atoms have the same kinetic energy as they did as a solid at a particular temperature, such as the melting point.
Can atoms melt by themselves?No, an atom cannot be melted. The three common states of matter no longer hold true when you are dealing with so tiny a piece. Atoms do not alter until by nuclear fission or fusion.
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A solution is prepared by adding 750.0 mL of 4.00 x 10^-33 M Ce(NO3)3 to 300.0 mL of 2.00 x 10^-2 M KIO3. Will Ce(IO3)3 (Ksp = 1.9 × 10^-10) precipitate from this solution?
Answers
Ce(IO3)3 will not precipitate from the solution.
Solution explained.
To determine if Ce(IO3)3 will precipitate from the solution, we need to calculate the concentration of Ce3+ and IO3- ions in the solution, and then use the solubility product constant (Ksp) to determine if a precipitate will form.
First, let's calculate the number of moles of Ce(NO3)3 added to the solution:
nCe(NO3)3 = (750.0 mL) (4.00 x 10^-33 mol/L) = 3.00 x 10^-30 mol Ce(NO3)3
Next, let's calculate the number of moles of KIO3 in the solution:
nKIO3 = (300.0 mL) (2.00 x 10^-2 mol/L) = 6.00 x 10^-3 mol KIO3
Since KIO3 is a strong electrolyte, it will dissociate completely in solution, giving us the same number of moles of IO3- ions:
nIO3- = 6.00 x 10^-3 mol
Since Ce(NO3)3 is also a strong electrolyte, it will dissociate completely to give us 3 times the number of moles of Ce3+ ions:
nCe3+ = 3.00 x 10^-30 mol x 3 = 9.00 x 10^-30 mol
Now, let's calculate the concentration of Ce3+ ions:
[Ce3+] = (9.00 x 10^-30 mol) / (1050.0 mL) = 8.57 x 10^-34 M
Finally, we can calculate the ion product (IP) of Ce(IO3)3:
IP = [Ce3+] [IO3-]^3 = (8.57 x 10^-34)^1 (6.00 x 10^-3)^3 = 7.34 x 10^-41
Comparing this value to the Ksp of Ce(IO3)3 (1.9 × 10^-10), we see that IP << Ksp.
Therefore, Ce(IO3)3 will not precipitate from the solution, and the solution will remain homogeneous.
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What is the molar mass of a gas if 0.310 grams of the gas at a pressure of 951 mm Hg and a temperature of 41.4 degrees Celsius occupies a volume of 53.9 mL. Use R = 0.082058 L atm/mol K and Kelvin = 273.15 + degree Celcius
Answers
As a result, the gas's molar mass is 72.05g/mol. If 0.310 grams of a gas are present at the a temperature of 41.4 degrees and a pressure of 951 mm Hg, the molar mass of the gas is 72.05 g/mol.
What is Describe a molar mass?The amount of a material measured in moles is multiplied either by mass of a chemical compound to get the molar mass M. MB = m/nB, where m is just the total mass of such a sample of a pure substance & nB is the sum of substance B expressed in moles, is the formula for this equation.
Molar mass: how is it determined?A chemical element or compound's molar mass is calculated by dividing its mass (in grams) by the substance's volume (mol). The standard atomic masses of the constituent atoms (in g/mol) can be added to determine the molar mass of a compound.
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A pile of sugar contains 1.2x10 24 molecules. How many moles are in the sample? I am starting with the unit _______________ and solving for the unit ________________.
Answers
The number of moles present in the 1.2×10²⁴ molecules of the sample is 2 moles
How do i determine the mole present?The number of mole of the sugar in the sample containing 1.2×10²⁴ molecules can be obtained as follow:
Number of molecules = 1.2×10²⁴ moleculesNumber of mole =?From Avogadro's hypothesis,
6.022×10²³ molecules = 1 mole of NaCl
Therefore, we can say that
1.2×10²⁴ molecules = 1.2×10²⁴ / 6.022×10²³
3.011×10²³ molecules = 2 mole of sugar
Thus, the number of mole of sugar present is 2 mole
From the above calculation, we can see that we started with molecules and we ended in moles
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What is the solvent in an icy glass of lemonade?
Question 1 options:
ice
water
sugar
lemon juice
Question 2 (1.25 points)
Liquid water in the earth's air is an example of a solution. Which type of solution would this be?
Question 2 options:
solid in a gas
liquid in a liquid
gas in a liquid
liquid in a gas
Question 3 (1.25 points)
Some solutions cannot dissolve any more solute. Which word is used to describe a solution of this type?
Question 3 options:
saturated
unsaturated
concentrated
weak
Question 4 (1.25 points)
The random movement of molecules in a solvent causes which of the following in a cube of solid solute?
Question 4 options:
a change in the chemical identity of a solute
a decrease in concentration of a solute
dissolution
a supersaturated solution
Question 5 (1.25 points)
What are the units of molarity?
Question 5 options:
moles of component/total moles of solution
moles of solute/kilograms of solvent
moles of solute/moles of solution
moles of solute/liters of solution
Question 6 (1.25 points)
Which of the following statements is true about strong, weak, and nonelectrolytes?
Question 6 options:
Strong electrolytes completely dissociate in water, weak electrolytes partially dissociate, and nonelectrolytes do not dissociate.
Strong electrolytes completely dissociate in water, weak electrolytes do not dissociate, and nonelectrolytes partially dissociate.
Strong electrolytes partially dissociate in water, weak electrolytes completely dissociate, and nonelectrolytes do not dissociate.
Strong electrolytes partially dissociate in water, weak electrolytes partially dissociate, and nonelectrolytes completely dissociate.
Question 7 (1.25 points)
What is the number of moles of a solute that is dissolved in 1 liter of solution?
Question 7 options:
molarity
molality
mole fraction
mass percent
Question 8 (1.25 points)
What type of solution would you have if you have a sealed container with 100g of water and 0.15g of dissolved CO2 at 40°C?
Question 8 options:
unsaturated
saturated
supersaturated
Question 9 (1.25 points)
Which colligative property is employed when coolant is added to a car's radiator to keep it from overheating?
Question 9 options:
freezing-point depression
boiling-point elevation
vapor-pressure lowering
Question 10 (1.25 points)
Which of the following substances is insoluble in water, according to these solubility rules?
Question 10 options:
Silver chloride (AgCl)
Sodium chloride (NaCl)
Potassium nitrate (KNO3)
Calcium hydroxide (Ca(OH)2)
Note: the curved line graph is for question and the other one with different elements is for question 10!
Answers
Answer: Your welcome!
Explanation:
Answer 1: Ice, water, sugar, lemon juice
Answer 2: Liquid in a gas
Answer 3: Saturated
Answer 4: Dissolution
Answer 5: Moles of solute/liters of solution
Answer 6: Strong electrolytes completely dissociate in water, weak electrolytes partially dissociate, and nonelectrolytes do not dissociate.
Answer 7: Molarity
Answer 8: Saturated
Answer 9: Freezing-point depression
Answer 10: Silver chloride (AgCl)
A 475 mg sample of the weak monoprotic acid dimethylglycine, N(CH3)2CH2COOH, is dissolved in some water. What is the minimum volume, in mL, of a 0. 100 M calcium hydroxide solution required to neutralize all of the acid?
Answers
The minimum volume of a 0.100 M calcium hydroxide solution required to neutralize all of the dimethylglycine is 41.2 mL.
The balanced chemical equation for the reaction between dimethylglycine and calcium hydroxide is:
N(CH3)2CH2COOH + Ca(OH)2 → Ca(N(CH3)2CH2COO)2 + 2H2O
From the equation, we can see that 1 mole of dimethylglycine reacts with 1 mole of calcium hydroxide. We can use this information to calculate the amount of calcium hydroxide required to neutralize the acid.
First, we need to determine the number of moles of dimethylglycine in the sample:
molar mass of dimethylglycine = 115.13 g/mol
number of moles = 475 mg / 1000 mg/g / 115.13 g/mol = 0.00412 mol
Since 1 mole of dimethylglycine reacts with 1 mole of calcium hydroxide, we need 0.00412 mol of calcium hydroxide to neutralize the acid.
Finally, we can use the molarity of the calcium hydroxide solution to determine the volume required:
moles of Ca(OH)2 = 0.00412 mol
volume of Ca(OH)2 solution = moles / molarity = 0.00412 mol / 0.100 mol/L = 0.0412 L
Converting this to milliliters:
volume of Ca(OH)2 solution = 41.2 mL
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If you have 100. 0g of O2, how many grams of Al2O3 will be produced?
Answers
If we have 100 g of O₂, the mass in grams of Al₂O₃ will be produced is 477.8 g.
The chemical equation is as follows :
4Al (s) + 3O₂ (g) ==> 2Al₂O₃ (s)
The mass of the O₂ = 100 g
The molar mass of the O₂ = 32 g/mol
The moles of the O₂ = 100 g / 32 g/mol
The moles of the O₂ = 3.125 mol
The 3 moles of the O₂ produces the 2 moles of the Al₂O₃
The moles of the Al₂O₃ = (2/3 ) 3.125
The moles of the Al₂O₃ = 4.687 mol
The mass of the Al₂O₃ = moles × molar mass
The mass of the Al₂O₃ = 4.687 × 101.96
The mass of the Al₂O₃ = 477.8 g
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Electricity costs about 20 cents per kilowatt-hour. A kilowatt-hour is the amount of
energy used by running a 1000-watt (aka 1 kilowatt) device for 1 hour. If you leave your
100-watt lightbulb (0.1 kilowatts) on all the time, how much will it cost (in dollars) per
month?
Answers
The cost (in dollar) of running your 100 watt light bulb at the time per month is $ 14.4
How do i determine the cost of running the light bulb?First, we shall determine the energy consumed per month by the light bulb
Power (P) = 100 watts = 100 / 1000 = 0.1 KW Time (t) = 30 days = 30 × 24 = 720 hoursEnergy (E) =?E = Pt
E = 0.1 × 720
E = 72 KWh
Finally, we shall determine the cost of running the light bulb. Details below
Cost per KWh = 20 cents = 205 / 100 = $ 0.2Energy (E) = 72 KWhCost of running per month =?Cost = energy × Cost per KWh
Cost of running per month = 72 × 0.2
Cost of running per month = $ 14.4
Thus, we can conclude that the cost of running per month is $ 14.4
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1)A student has a 0.500 M solution of hydrochloric acid (HCI) that is too concentrated
for an experiment. The student needs to dilute the solution to 0.100 M. If the
student needs 250 mL of the diluted solution, how much of the original solution
should be used?
250 ml
125 ml
50.0 ml
500 ml
2)Martha has a large amount of 1.25 M H₂ SO4 in her lab. She needs 0.36 moles of
H2 SO 4 for a chemical reaction she wants to perform. How many liters of the
olution should she use?
2.9 L
5.8 L
0.58L
0.29 L
Answers
Explanation:
Refer to pics.............
According to the molar concentration, if the student needs 250 ml of the diluted solution, 50 ml of the original solution should be used and in second case 0.29 liters of the solution should be used.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution in second formula gives volume= 0.36/1.25=0.288 liters. and in case of 2 solutions it is calculated as, M₁V₁=M₂V₂ and on substitution gives V₁=0.1×250/0.5=50 ml.
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What would be the measurements for the Earth, Moon, and distance from each other using 1/64 scale
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The measurement of the Earth, Moon, and distance from each other using 1/64 scale is 55600 km that will 1/64 of earths size.
The Moon is just 1/4 the size of Earth, with a diameter of 2,159 miles (3,475 kilometres).
The average distance between the Moon and Earth is 238,000 miles (383,500 km).
Orbit around Earth: It takes the Moon 27.3 Earth days to complete one orbit around our planet.
The Moon rotates on its axis once every 27.3 Earth days.
Surface features include craters, mountain ranges, rilles (long, narrow channels), and lava plains. The enormous, dark areas seen on the Moon's surface are known as maria, or seas. These are, in fact, massive, smooth lava beds. Highlands are brilliant, luminous patches on the Moon's surface.
Around 500 miles (800 kilometres) of the Moon's surface is covered by a solid, rocky crust.
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How is paper a insulator but it burna when theres fire
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Explanation: Paper is a good insulator of heat and electricity but it has low ignition temperature means it cannot absorb much heat therefore it burns easily .
Which TWO situations would a tuned mass damper be a useful technology?
A
B
C
D
E
F
flood
landslide
high wind
avalanche
earthquake
W
volcanic eruption
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Answer: highwinds and earthquake
Explanation:
"What does a tuned mass damper do?
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A Tuned Mass Damper (TMD), also called a "harmonic absorber", is a device mounted to a specific location in a structure, so as to reduce the amplitude of vibration to an acceptable level whenever a strong lateral force such as an earthquake or high winds hit"
What type of solution would you have if you have a sealed container with 100g of water and 0.15g of dissolved CO2 at 40°C?
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a piece of metal weighing 59.047g was heated to 100c and then put into a 100mL of water (Initially at 26.7c). the metal and water were allowed to come to an equilibrium temperature determined to be 27.8c. assuming no heat lost to the environment, calculate the specific heat of the metal
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A piece of metal weighing 59.047g was heated to 100°C and then put into a 100mL of water. The metal and water were allowed to come to an equilibrium temperature determined to be 27.8°C. 0.40J/g °C is the specific heat of the metal.
What is specific heat?In thermodynamics, the massic heat capacity (also known as massic heat capacity) of a material is indeed the heat capacity of such a sample of both the material divided by that of the mass of the sample (symbol c).
Informally, it refers to the quantity of heat that needs to be added between one unit of a substance's mass in order to raise its temperature by one unit.
m₁ × c₁×(final temperature-T₁) =-(m₂×c₂×(final temperature-T₂)
59.04 × c₁×(27.8-100) =-(100×4.18×(27.8-23.7)
c₁ =0.40J/g °C
Therefore, 0.40J/g °C is the specific heat of the metal.
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. What is the mole ratio of Na₂CO3 to Al₂(CO3)3?
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The mole ratio of Na₂CO3 to Al₂(CO3)3 can be determined by comparing the coefficients in the balanced chemical equation for the reaction involving these two compounds.
What is mole ratio?Mole ratio is a term used in chemistry to describe the relationship between the amount of two or more substances in a chemical reaction. It is the ratio of the number of moles of one substance to the number of moles of another substance involved in the reaction.
A mole is a unit of measurement used in chemistry to quantify the amount of a substance. One mole of any substance contains Avogadro's number of particles, which is approximately 6.02 x 10^23 particles. Therefore, a mole ratio describes the relative amounts of substances in terms of the number of moles.
The mole ratio of Na₂CO3 to Al₂(CO3)3 can be determined by comparing the coefficients in the balanced chemical equation for the reaction involving these two compounds.
However, since a reaction is not specified, I can't give you an exact answer.
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m = 108.75 q
volume = 75 ml
D =
What is the density
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The density of a substance is its mass divided by volume. The density of the substance with a mass of 108.75 g and volume of 75 ml is 1.45 g/ml.
What is density ?The density of a substance is the measure of its mass per unit volume. Density describes how closely its particles are packed. The density of a substance depends on the bond type, molecular weight, temperature and pressure as well.
The floating property of a substance on a fluid depends on its density. If it has less density than the fluid it will float on it.
Given,
the mass of the object m = 108.75 g
volume = 75 ml
density = mass/ volume
d = 108.75 g /75 ml
= 1.45 g/ml.
Therefore, the density of the substance with the mass of 108.75 g and 75 ml volume is 1.45 g/ml.
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