Answer:
300g of water was used to make the solution
Explanation:
In the sugar solution, there are dissolved 45g of sugar in 100mL of water. The conversion factor is 45g Sugar = 100mL water. That means when 135g of sugar are used the amount of water is:
135g sugar * (100mL water / 45g sugar) =
300g of water was used to make the solutionI am worried about your proposal to install a groundwater heating system in my daughter’s school.
I don’t think that water at a temperature of 30°C has enough energy to heat the school. If the school is too cold, the students won’t be able to focus on learning.
Respond to David Li’s letter. Explain how the groundwater system could heat the air in the school.
Answer: The temperature would increase assuming it is 30 degree water causing a change in the temperature and assuming it is a seismic groundwater source you are using the earths core to heat the school so it would likely be a stable energy source. There are very few places on the planet where that warm of water is accessible without drilling really deep into the core but if it is there and is a stable fault then the energy would be consistent and stable.
The groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.
Groundwater heating system:
Although the temperature of the ground water is not much but the amount of groundwater is too much.
This large amount water slowly releases heat energy which is transferred in the ambient atmosphere of school.
Therefore, the groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.
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What cell function produces offspring
Answer:Sexual reproduction produces offspring with novel combinations of genes
Explanation:
yes
Helpppppppppppppppppp
the answer is deceleration.
Zinc sulfide and oxygen gas react to form zinc oxide and sulfur dioxide. Determine the amount (g) of SO2 that should be produced in a reaction between 32.5 g of ZnS and 23.3 g of oxygen gas. What is the mass of the xs reactant?
Answer:
7.30g O₂ are in excess and 21.3g of SO₂ should be produced.
Explanation:
The reaction of Zinc sulfide (ZnS) with oxygen (O₂) produce ZnO and SO₂ as follows:
2ZnS + 3O₂ → 2ZnO + 2SO₂
Using this reaction we can find the amount of SO₂ produced converting the ZnS and O₂ to moles and finding limiting and excess reactant as follows:
Moles ZnS -Molar mass: 97.47g/mol-:
32.5g * (1mol / 97.47g) = 0.333 moles ZnS
Moles O₂ -Molar mass: 32g/mol-:
23.3g O₂ * (1mol / 32g) = 0.728 moles O₂
For a complete reaction of the 0.333 moles of ZnS are required:
0.333 moles ZnS * (3mol O₂ / 2mol ZnS) = 0.500 moles O₂.
As there are 0.728 moles of O₂, limiting reactant is ZnS and excess reactant is O₂.
The moles and mass of O₂ in excess are:
0.728mol - 0.500mol = 0.228moles O₂ * (32g / mol) = 7.30g O₂ are in excess
The produced mass of SO₂ -Obtained from the moles of ZnS- is:
0.333 moles of ZnS * (2mol SO₂ / 2mol ZnS) = 0.333 moles SO₂
0.333 moles SO₂ * (64.066g / mol) =
21.3g of SO₂ should be producedConvert 8.00 x 1020 molecules of H2 to moles.
Answer:
1.33 x 10^-3 mol H2
Explanation:
? mol H2 = 8.00 x 1020^20 molecules H2 x 1 mol H2/6.02 ! 1023 molecules H2 = 1.33 x 10^-3 mol H2
Hope that helps!
8.00 x 10²⁰ molecules of H₂ present in 1.33 x 10⁻³ mole of H₂.
What is mole?Mole is used to define the amount of quantity of any substance and 1 mole equals to the 6.023 × 10²³ elementary entities or atoms in it.
According to the question:
1 mole of H₂ = 6.023 × 10²³ molecules of H₂
or 1 molecules of H₂ = 1 mole of H₂ / 6.023 × 10²³ molecules of H₂
To convert 8.00 x 10²⁰ molecules into mole we calculate as follow:
x mole of H₂ = (8.00 x 10²⁰ molecules x 1 mole of H₂) / 6.023 × 10²³ molecules
x mole = 1.33 x 10⁻³ mole
Hence, 1.33 x 10⁻³ mole of H₂ consist 8.00 x 10²⁰ molecules.
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The Milky Way Galaxy is made up of billions of stars. Which of the following best describes the shape of the Milky Way Galaxy
OA. a sphere
OB. a pyramid
C a spiral
OD
a cube
Answer:
It's spiral for any of my study island people.
Explanation:
What is the percent composition by mass of oxygen in the compound
MgSO4?
20%
46%
53%
27%
What is the Molarity of 0.250 L of solution containing 4.32 g of magnesium
phosphide (Mg3P2)?
A. 0.128 M
B. 0.312 M
C. 1.13 M
D. 1.97 M
Energy in a chemical reaction can be identified as which of the following?
A.) Heat
B.) Light
C.) ∆H
D.) 2,000Kj
E.) All of the above
The sound made by crickets occurs when the male crickets rubs its two hind legs together. Which type of energy transformation results in the sound made by crickets?
A.sound energy to thermal energy
B.thermal energy to chemical energy
C.mechanical energy to sound energy
D.mechanical energy to chemical energy
Answer:
You can simply use process of elimination to find your answer. The only option that results in SOUND energy is C. Therefor your answer would be C.
Explanation:
<3
The rubbing of the hind legs by crickets converts the mechanical energy to sound energy. Thus, option C is correct.
Crickets have been the nocturnal animals that sleep in the daytime and were awake at the night. The crickets have been consisted of the front limbs and hind limbs with a pair of wings that support them to fly.
The crickets make the sound by the rubbing of the legs, thereby creating the vibrational sounds that have been sound energy.
The rubbing of legs has been utilized as the mechanical energy or the energy of doing work. The mechanical energy has been converted to the vibrational energy that contributes to the energy of the sound waves, thereby the sound energy.
Thus, the rubbing of the hind legs by crickets converts the mechanical energy to sound energy. Thus, option C is correct.
For more information about the energy transformation, refer to the link:
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A white salt containing an unknown metal has the formula MCl and gives a lilac flame during a flame test. the salt could be
NaCl
B:
MgCl
C:
KCl
D:
LiCl
Answer:
C
Explanation:
KCl - the flame test for Potassium produces a lilac flame
The metal in the salt has been potassium, and the salt has been KCl. Thus, option C is correct.
The flame test has been performed with the burning of the salt under the flame. The electrons of the elements after gaining the energy have been excited to the higher energy level.
There has been the returning of the electrons to the ground state. In the process. the absorbed energy has been released in the form of visible radiations. The determination of the radiations results in the determination of the metal, as each metal has a unique flame.
The burning of the salt results in the lilac flame. The flame has resembled the burning of potassium. Thus, the metal in the salt has been potassium, and the salt has been KCl. Thus, option C is correct.
For more information about the flame test, refer to the link:
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i need help asap :( i’ll give you brainliest
Answer:
a.0.837 moles of silver phosphate
b. 14.55
c. 2.61
Explanation: it is all about the molar ratio so the numbers of front of the molecular formulas there is a 3 in front of the silver nitrate and the other 2 we are asked abuoit have no number so that is a 1 so you are multiplying or dividing by that ratio whichever way you go
Small children are occasionally injured when they try to inhale helium from a compressed helium tank. If a small child tries to transfer the contents of a 5.0 L tank of helium at a pressure of 125 atm and a temperature of 20⁰C into its lungs, how many moles of gas would the child inhale?
Answer:
26.0 moles
Explanation:
Given the formula;
PV =nRT
P= pressure of the gas
V = volume of the gas
n = number of moles of the gas
R = gas constant
T = temperature
n = PV/RT
n = 125 * 5/0.082 * (20 + 273)
n = 625/24.026
n = 26.0 moles
Which statement is false? a. A closed system does not interact with its surroundings. b. Matter and energy can be transformed in and out of a system c. Energy can be created or destroyed. d. If energy appears to be gained or lost, it has just changed into a different form
What is the atomic mass of an atom that contains 28 protons, 28 electrons, and 30 neutrons?
86
28
58
56
certain conductor with a resistance of 10 Ohms is crossed by an electric current of intensity 100 mA. What is the potential difference at the terminals of that conductor?
Answer:
1.0 V
Explanation:
Step 1: Given data
Resistance of certain conductor (R): 10 ΩCurrent's intensity (I): 100 mAPotential difference at the terminals of that conductor (V): ?Step 2: Convert "I" to Ampere
We will use the conversion factor 1 A = 1000 mA.
100 mA × 1 A/1000 mA = 0.100 A
Step 3: Calculate the potential difference
We will use Ohm's law.
V = I × R
V = 0.100 A × 10 Ω = 1.0 V
SMOOTHIES: Why does adding lemon juice [to a blueberry smoothie
make it change colour from purple to pink?
Answer:
Explanation:
Cuz the color is a light yellow and water to make it loose color
The mixing of two different liquids together to form a new mixture is called a solution.
The correct option is acid.
In a solution, there are two components which are known as solute and solvent. In which solute is less in amount and solvent is more in an amount which is water.
According to the question, the smoothie turns the color to pink from purple because lemon act as an acid and changes the ph of the solution.
Hence, the Lemon act as an acid.
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Balancing C10H16 + Cl2 > C + HCl
brainy ki maa ki chut bhag bakwas aap
How many primary consumers are pictured in the food web? 1 2 3 4
Answer:2
Explanation:
An enzyme is a catalyst.what does this mean?
Answer:
A catalyst is anything that alters the rate of the reaction same as an enzymes that adds to the process in a human body which stops working when a person has fever
Answer:
Enzymes are proteins functioning as catalysts that speed up reactions by lowering the activation energy. A simple and succinct definition of an enzyme is that it is a biological catalyst that accelerates a chemical reaction without altering its equilibrium. ... In the overall process, enzymes do not undergo any net change.
I hope it's helpful!
The diagram represents liquid water in a pan on a hot plate. The liquid water is boiling and changing into water vapor. The process of boiling water is considered to be a
Answer:
Physical change
Explanation:
The molecules are being rearranged as the water changes phases from liquid to gas, but this doesn't change the chemical structure of the water.
Which of the following groups of elements are likely to be radioactive? (5 points) a Actinides b Noble gases c Transition metals d BCNOs
Answer:
Actinides
Explanation:
They are defined as "any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of natural occurrence"
Answer:
Actinides
Explanation:
Actinides are radioactive and human-made elements.
What is an atomic number? An atomic mass?
Answer:
The atomic number is the number of the elements inside the periodic table and the mass is the weight or a number under the elements.
Explanation:
Correct me if I am wrong
Answer:
Atomic number
The number of protons in the nucleus of an atom.
Atomic Mass
The mass of an atom of a chemical element expressed in atomic mass units.
Nitrogen gas (N2) and hydrogen gas (H2) react to produce ammonia (NH3).
If we have 2 mol of N2, how many moles of NH3 will be produced?
1 mol NH3
2 mol NH3
3 mol NH3
4 mol NH3
Answer:
I believe it would be 2
Explanation:
if there are 2 nitrogen molecules then there would have to be 2 hydrogen molecules but this could be completely wrong
if this happens to be right, ur welcome :3 here's a Jay Jay pic for u cuz why not
Answer:
Anwer is A 0.60
Explanation:
2. According to the graph below, what temperature will result in the highest rate of photosynthesis?
100+ Oxygen flow (LH)
80
60
40
20
0
Temperature (°C)
10
20
30
40
50
O A.5°C
O B. 40°C
O C.30°C
OD. 25°C
Answer:
D 25°c is the highest rate of photosynthesis.
The statement “Matter cannot be created or destroyed during a chemical change.” is known as
Among the alkaline earth metals in Group 2A/A, which is more reactive - beryllium (element 4) or strontium (element 38)?
Answer:
Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.
Explanation:
What kind of bond will form when Sodium and Nitrogen react?
Answer: Ionic Bonds
"When it forms the nitride ion, it gains three electrons to form a 3- ion: N3− . In ionic compounds, the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N"
Explanation:
https://socratic.org/questions/what-is-the-formula-for-sodium-nitride#:~:text=When%20it%20forms%20the%20nitride,nitride%20is%20Na3N%20.
Define unbalanced forces(giving Brainly)
Answer:
Unbalanced forces are forces whose net amount is not zero.
This can take place when two equal forces are acting in the same direction or opposite direction but with different forces.
Unbalanced forces make some change in the position of the object on which force is exerted.
Answer:
This can take place when two equal forces are acting in the same direction or opposite direction but with different forces.
Unbalanced forces make some change in the position of the object on which force is exerted.
Paragraph 2 discusses two different types of thermochemical reactions. In one type of
reaction, the enthalpy term is located on the reactant side of the equation. Which type of
reaction is this?
Answer: The reaction is endothermic.
Explanation:
Endothermic reaction : It is a type of chemical reaction where the energy is absorbed from the surrounding. In the endothermic reaction, the reactant have less energy than the energy of products
In endothermic reaction, enthalpy terms is located on the reactant side.
Example: [tex]A+B+energy\rightarrow C+D[/tex]
Exothermic reaction : It is a type of chemical reaction where the energy is released into the surrounding. In the exothermic reaction, the energy of reactants are more than the energy of products
In exothermic reaction, enthalpy terms is located on the product side.
Example: [tex]A+B\rightarrow C+D+energy[/tex]