Answers
The experimental yield is 2.9 g, the theoretical yield is 2.96 g, and the percent yield is 97.97%.
How to find the experimental yield, theoretical yield and Percent yield?
To find the experimental yield, we need to determine the weight of copper chloride (CuCl) obtained from the reaction. We can calculate this by subtracting the weight of the watch glass and filter paper from the weight of the watch glass, filter paper, and CuCl precipitate:
Weight of CuCl = (Weight of Watch Glass + Filter Paper + CuCl Precipitate) - (Weight of Watch Glass and Filter Paper)
Weight of CuCl = 13.4 g - 10.5 g
Weight of CuCl = 2.9 g
To find the theoretical yield, we need to calculate the amount of copper that should be produced based on the reaction stoichiometry. The balanced chemical equation for the reaction between copper and nitric acid is:
Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O
From the equation, we can see that one mole of copper reacts with four moles of nitric acid to produce one mole of copper(II) nitrate (Cu(NO3)2). The molar mass of copper is 63.55 g/mol, so the amount of copper used in the reaction is:
Amount of Cu = Weight of Cu / Molar mass of Cu
Amount of Cu = 1.034 g / 63.55 g/mol
Amount of Cu = 0.016 mol
Since one mole of copper produces one mole of copper(II) nitrate, the theoretical yield of copper(II) nitrate is also 0.016 mol.
The theoretical yield of copper(II) nitrate is:
Theoretical yield = Amount of Cu(NO3)2 x Molar mass of Cu(NO3)2
Theoretical yield = 0.016 mol x 187.57 g/mol
Theoretical yield = 2.96 g
Finally, we can calculate the percent yield using the formula:
Percent yield = (Experimental yield / Theoretical yield) x 100%
Plugging in the values we calculated, we get:
Percent yield = (2.9 g / 2.96 g) x 100%
Percent yield = 97.97%
Therefore, the experimental yield is 2.9 g, the theoretical yield is 2.96 g, and the percent yield is 97.97%.
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Related Questions
Determine the mass in grams of CO, that is produced by the complete reaction of
0.2038 moles of CH₁ (xylene) according to the following combustion reaction:
C_H,,(I)+ 10.5 O,(9)– 8 |CO,(g)+ 5 \H,O(g)
Answers
Taking into account the reaction stoichiometry, 71.7376 grams of CO₂ is produced by the complete reaction of 0.2038 moles of xylene.
Reaction stoichiometryIn first place, the balanced reaction is:
C₈H₁₀ + 10.5 O₂ → 8 CO₂ + 5 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
C₈H₁₀: 1 moleO₂: 10.5 molesCO₂: 8 molesH₂O: 2 molesThe molar mass of the compounds is:
C₈H₁₀: 106 g/moleO₂: 32 g/moleCO₂: 44 g/moleH₂O: 18 g/moleBy reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
C₈H₁₀: 1 mole ×106 g/mole= 106 gramsO₂: 10.5 moles ×32 g/mole= 336 gramsCO₂: 8 moles ×44 g/mole= 352 gramsH₂O: 5 moles× 18 g/mole= 90 gramsMass of CO₂ formedIt can be applied the following rules of three: if by reaction stoichiometry 1 mole of C₈H₁₀ form 352 grams of CO₂, 0.2038 moles of C₈H₁₀ form how much mass of CO₂?
mass of CO₂= (0.2038 moles of C₈H₁₀× 352 grams of CO₂)÷1 mole of C₈H₁₀
mass of CO₂= 71.7376 grams
Finally, 71.7376 grams of CO₂ are formed.
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number of moles in 29.8 g NaCL
Answers
Answer:
0.509 (to 3dp)
Explanation:
The formula for moles is:
moles = mass ÷ molar mass
The molar mass of NaCl can be calculated by adding the relative atomic masses of each element in the compound, which you can find in a periodic table:
molar mass = 23.0 + 35.5 = 58.5
Now, we can find the number of moles of NaCl in 29.8g:
moles = 29.8 ÷ 58.5 = 0.509 (to 3dp)
ANSWER ALL - OVERDUE
Which of the following statements about salinity is true? Lesson 2.02
Question 1 options:
Ocean water in areas with high humidity has a higher salinity.
Ocean water near rivers has a lower salinity.
Ocean water in regions with high levels of precipitation has higher salinity.
Ocean water near areas with low evaporation has higher salinity.
Question 2 (1 point)
Saved
How are latitude and temperature related? (Lesson 2.03)
Question 2 options:
Lower latitudes will have warmer water because it is closer to the equator
Higher latitudes will have warmer water because it is closer to the poles.
Higher latitudes will have warmer water because it is closer to the equator.
Question 3 (1 point)
Saved
How does salinity vary with freezing and melting? (Lesson 2.02)
Question 3 options:
Both freezing and melting increase salinity.
Freezing increases salinity, while melting decreases salinity.
Both freezing and melting decrease salinity.
Freezing decreases salinity, while melting increases salinity.
Question 4 (1 point)
How does salinity vary with evaporation? (Lesson 2.02)
Question 4 options:
When water evaporates, it leaves salt behind, increasing its salinity.
When water evaporates, it takes salt with it, decreasing its salinity.
When water evaporates, it takes salt with it, increasing its salinity.
When water evaporates, it leaves salt behind, decreasing its salinity.
Question 5 (1 point)
Saved
What is density? (Lesson 2.02)
Question 5 options:
the amount of salt in water
the weight of water
a measure of salinity
the amount per unit volume of a particular material
Question 6 (1 point)
Saved
As the amount of salt in water increases, the___________ of the water increases. (Lesson 2.02)
Question 6 options:
temperature
humidity
size
density
Question 7 (1 point)
Deep, cold water is the __________. Warm, shallow water is the ___________. (Lesson 2.03)
Question 7 options:
densest; densest
least dense; densest
densest; least dense
least dense; least dense
Question 8 (1 point)
Which layer of the ocean is the least dense? (Lesson 2.03)
Question 8 options:
closest to the ocean floor
closest to the surface
middle layer
they are all the same
Question 9 (1 point)
The _______________makes things (like planes or currents of air) traveling long distances around Earth appear to move at a curve as opposed to a straight line. (Lesson 2.05)
Question 9 options:
Aurora
Coriolis Effect
Salinity effect
Temperature
Question 10 (1 point)
The main cause of wind is differences in temperature in different areas. (Lesson 2.04)
Question 10 options:
True
False
Answers
Statements on salinity;
Ocean water near rivers has a lower salinity, B.Lower latitudes will have warmer water because it is closer to the equator, A.Freezing increases salinity, while melting decreases salinity, A.When water evaporates, it leaves salt behind, increasing its salinity, B.The amount per unit volume of a particular material, D.Density, D.Densest; least dense, C.Closest to the surface, B.Coriolis Effect, B.True.What is Salinity?Salinity refers to the measure of the concentration of dissolved salts, such as sodium and chloride ions, in a body of water. It is usually expressed in parts per thousand (ppt) or practical salinity units (PSU).
Salinity can vary in different bodies of water due to factors such as evaporation, precipitation, freshwater input from rivers, and ocean currents.
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A. How many moles of O₂ would 13.0 mol of Al2O3 produce?
Answers
19.5 moles of oxygen will be produced by 13 moles of Al₂O₃.
What is a mole?
The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Moles of Al₂O₃ = 13 moles
From the reaction -
2 Al₂O₃ ⇒ 4Al + 3O₂
2 moles of Al₂O₃ produces 3 moles of O₂
1 mole of Al₂O₃ produces 3 ÷ 2 moles of O₂
1 mole of Al₂O₃ = 1.5 mole of O₂
So, 13 moles of Al₂O₃ = 1.5 × 13 moles of O₂
= 19.5 moles of O₂.
Therefore, 19.5 moles of oxygen will be produced by 13 moles of Al₂O₃.
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A patient is infused with a drug at a rate of 20 μmol h^−1. It is removed from the blood by the liver, with a first order rate constant of 0.05 h^−1. If the patient's blood volume is 5.5 L, what is the steady state concentration of the drug in their bloodstream?
Answers
the steady state concentration of the drug in the patient's bloodstream is 400 μmol/L.
What is the blood stream?throughout the body, the blood's flow or motion. Blood travels through blood veins from the heart to the rest of the liver and muscles, tissues, and organs, carrying oxygen, nutrition, and other vital substances.
According to the given information:The rate of drug infusion is given as 20 μmol/h. The rate of drug elimination can be described by first-order kinetics:
d[C]/dt = -k[C]
where [C] is the concentration of the drug in the bloodstream, t is time, and k is the first-order rate constant for drug elimination by the liver.
20 μmol/h = k[C]
Solving for [C]:
[C] = (20 μmol/h) / k
Substituting k = 0.05 h⁻¹ (given in the problem):
[C] = (20 μmol/h) / (0.05 h⁻¹)
= 400 μmol/L
the steady state concentration of the drug in the patient's bloodstream is 400 μmol/L.
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Magnesium oxide can be made by heating magnesium metal in the presence of the oxygen. The balanced equation for the reaction is
2Mg(s)+O2(g)→2MgO(s)
When 10.2 g Mg is allowed to react with 10.4 g O2, 11.9 g MgO is collected.
Determine the theoretical yield for the reaction. In grams
Determine the percent yield for the reaction. In grams
Answers
The theoretical yield for the reaction is 16.97 g MgO.
The percent yield for the reaction is 70.08%.
Steps
Let's calculate the moles of Mg and O2:
Moles of Mg = 10.2 g / 24.31 g/mol = 0.420 mol
Moles of O2 = 10.4 g / 32.00 g/mol = 0.325 mol
The theoretical yield of MgO can be calculated using the moles of Mg:
Moles of MgO = 0.420 mol Mg × (2 mol MgO / 2 mol Mg) × (40.31 g/mol MgO) = 16.97 g
Therefore, the theoretical yield for the reaction is 16.97 g MgO.
To calculate the percent yield, we need to compare the actual yield to the theoretical yield:
Percent yield = (actual yield / theoretical yield) × 100%
Percent yield = (11.9 g / 16.97 g) × 100% = 70.08%
Therefore, the percent yield for the reaction is 70.08%.
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Which observations support the law of conservation of mass for electrolytic decomposition of
water
Answers
Answer:
1. The total masses of the products (hydrogen and oxygen gases) is equal to the mass of the water that was decomposed.
2. The number of atoms of each element in the reactants is equal to the number of atoms of each element in the products.
3. The total charge of the reactants is equal to the total charge of the products.
Explanation: water.
story of a carbon molecule
Answers
Answer:
Once upon a time, there was a carbon molecule named Carl. Carl was part of a larger molecule called carbon dioxide, which was constantly moving and shifting around in the air.
One day, Carl was breathed in by a plant. The plant used the carbon in Carl's molecule to create energy through a process called photosynthesis. Carl became a part of the plant, helping it to grow and thrive.
Over time, the plant continued to grow and eventually became a tree. Carl's molecule was now a part of the tree, where it helped to create wood and other plant materials.
As the tree grew older, it eventually fell to the ground and began to decompose. Carl's molecule was released back into the air as carbon dioxide, where it joined other carbon molecules in the atmosphere.
Over time, Carl's molecule was breathed in by animals, used in photosynthesis by plants, and released back into the air as part of the natural carbon cycle. Despite the many twists and turns of its journey, Carl's molecule continued to play an important role in the cycle of life on Earth.
Explanation:
how is the digestive system important to the muscular system
Answers
Answer:
The digestive system is important to the muscular system because it provides the necessary nutrients and energy required for muscle function and growth. The digestive system breaks down food into smaller molecules such as carbohydrates, proteins, and fats, which are then absorbed into the bloodstream and transported to the muscles. The muscles use these nutrients as fuel for energy during muscle contraction and growth. Additionally, the digestive system helps to eliminate waste products that can impair muscle function, such as lactic acid. Therefore, a healthy digestive system is essential for maintaining optimal muscular function and overall physical performance.
Explanation:
What is the volume of 2.0g of hydrogen gas?
Answers
in order to break water into hydrogen and oxygen water is heated to more than 500 degrees celsius which kind of reaction is this and why
Answers
Answer:
It is exothermic because heat needs to be released by the reactants to form the products.
Anyone know the whole answers to these?? Please help me
Answers
The solutions to the above questions on potential and kinetic energy are as follows:
1. 5.774m/s
2. 9702J
3. 0.71kg
4. 114.4kg
5. 135.05kg
How to calculate kinetic energy?Kinetic energy is the energy possessed by an object because of its motion, equal (nonrelativistically) to one half the mass of the body times the square of its speed i.e. K.E = ½mv²
QUESTION 1:
If an object has 25,000 joules of energy and a mass of 1500kg. The velocity can be calculated as follows:
25000 = ½ × 1500 × v²
v² = 33.3
v = 5.774m/s
QUESTION 2:
How much potential energy does an object have if it is 45 metres up in the air and has a mass of 22kg.
P.E = mgh
P.E = 22 × 9.8 × 45
P.E = 9702J
QUESTION 3:
The mass of an object that is 250m high in the air and has 1750J of energy is
1750 = m × 9.8 × 250
1750 = 2450m
m = 0.71kg
QUESTION 4:
The kinetic energy of an object is 35,750J moving at a velocity of 25m/s. The mass is as follows:
35750 = ½ × m × 25²
35750 = 312.5m
m = 114.4kg
QUESTION 5:
The potential energy of a boulder is 45,000J and is sitting 34m high. The mass of the boulder can be calculated as follows:
45000 = 34 × 9.8 × m
45000 = 333.2m
m = 135.05kg.
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10-14 what are the answers Show your work for all of these questions for brainliest and 20 points I need HELP ASAP PLS ITS HW
Answers
11. 5.08g
12. 1.08x10^-23 atoms of N
13. 2.30x10^23 atoms of Zn
14. 0.77 moles of Ne
explanation in picture :)
Which of the following is not a characteristic of a sonnet?
14 lines
Blank verse
Iambic pentameter
Rhyme scheme ABAB CDCD EFEF GG
Answers
Blank verse is not a characteristic of a sonnet.
What is not a characteristics of a sonnet?Blank verse is not a characteristic of a sonnet. Sonnets are typically written in iambic pentameter and have 14 lines, and the rhyme scheme varies depending on the type of sonnet. For example, the Shakespearean sonnet typically has the rhyme scheme ABAB CDCD EFEF GG, while the Petrarchan sonnet has the rhyme scheme ABBAABBA CDCDCD or ABBAABBA CDECDE. Blank verse, on the other hand, is unrhymed iambic pentameter and is typically used in longer poems or plays.
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Determine whether each statement is an example
of a physical change or a chemical change.
Wood is burned.
physical
chemical
0
Dry ice (solid carbon dioxide) vaporizes to form
carbon dioxide gas.
Ophysical
chemical
DONE ✔
Answers
Answer:
Burning of wood is chemical change
Dry ice into Carbon dioxide conversion is physical change.
Explanation:
Because when wood is burnt it cannot be recovered back by tthe ashes. So it is chemical change.
Dry ice conversion into Carbon dioxide is a physical change because the chemical composition remains same.
Answer:
wood = chemical
dry ice = physical
Explanation:
How many unpaired electrons are present in each of the following in the ground state: O, O+, O-, Os, Zr, S, F, Ar
URGENT PLEASE ANSWER
Answers
The number of unpaired electrons present in the ground state of O, O⁻, O⁺,Os, Zr, S, F, Ar are 2, 3, 1, 4, 2,1 and 0 respectively.
What are unpaired electrons?An unpaired electron is an electron that does not form part of an electron pair and occupies an atom's orbital single. Each of an atom's three atomic orbitals, designated by the quantum numbers n, l, and m, has the capacity to hold a pair of two electrons with opposing spins. Unpaired electrons are extremely uncommon in chemistry because an object carrying an unpaired electron is typically quite reactive. This is because the production of electron pairs, whether in the form of a chemical bond or as a lone pair, is frequently energetically advantageous.
How to calculate unpaired electrons?1)The electrical configuration of a chemical must first be determined in order to calculate the amount of unpaired electrons in the compound.
2)The next step is to set the electrons in their shells and count the unpaired electrons.
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Help Asha identify whether the reaction is a synthesis or decomposition reaction: 2 HCI → H₂ + Cl₂
A) Synthesis
B) Decomposition
Answers
Considering the definition of synthesis and decomposition reaction, the reaction 2 HCI → H₂ + Cl₂ is considered as a decomposition reaction.
Definition of synthesis reactionSynthesis or combination reactions occur when two or more reactants form a single product; heat is usually released (exothermic reaction).
The general form of the equation for this type of reaction is the following:
A + B → AB
Definition of decomposition reactionIn a decomposition reaction, a single substance breaks down, producing two or more different substances. This type of reactions can be considered the inverse of synthesis reactions. Heat is usually needed for the reaction to occur.
The general form of these equations is as follows:
AB → A + B
This caseThe reaction 2 HCI → H₂ + Cl₂ is considered as a decomposition reaction because hydrochloric acid molecule breaks down to produce hydrogen gas and chlorine gas.
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5-chloro-4-methyl-2-nonyne
Answers
5-chloro-4-methyl-2-nonyne is an organic compound with the molecular formula C11H19Cl. It belongs to the class of alkynes, which are hydrocarbons that contain at least one triple bond between two carbon atoms.
The name of the compound indicates that it has a chlorine atom (denoted by "chloro") attached to the fifth carbon atom of the carbon chain, a methyl group (-CH3) attached to the fourth carbon atom, and a triple bond between the second and third carbon atoms of the carbon chain. The carbon chain contains a total of nine carbon atoms (denoted by "nonyne" indicating nine carbons).
The structural formula of 5-chloro-4-methyl-2-nonyne can be written as:
CH3-C≡C-C(CH2)6-Cl
where the triple bond is represented by a "≡" symbol, and the carbon atoms are numbered according to the naming convention.
Answer:
it's an organic compound
If you were asked to dissolve a solid into an aqueous solution, how could you speed this process up? How could you slow it down? Listed below are a number of possible ways to alter the rate of this process. Place them in the proper category. If you need help, think about putting sugar in your tea.
Answers
The dissolution can be sped up by stirring and it can be slowed by cooling the solution.
How could you speed up the dissolution of a solid in a solution?Breaking the solid into smaller pieces, grinding it into a powder, or using a solution with a larger surface area can increase the surface area of the solid, making it easier for the solvent to come into contact with the solid and dissolve it faster.
Stirring, shaking, or otherwise agitating the solution can help to increase the mixing of the solvent and the solid, which can speed up the dissolution process.
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At a certain temperature, the p
for the decomposition of H2S
is 0.819.
H2S(g)↽−−⇀H2(g)+S(g)
Initially, only H2S
is present at a pressure of 0.225 atm
in a closed container. What is the total pressure in the container at equilibrium?
Answers
At equilibrium, the pressure of each component in the reaction must be equal to the partial pressure of the component (pH2S = 0.225 atm, pH2 = pS = 0.819 x 0.225 atm = 0.182975 atm).
What is equilibrium?Equilibrium is a state of balance between opposing forces. It refers to a state in which opposing forces or influences are balanced and in equilibrium with one another. This idea is used in many different areas, from economics to physics. In economics, equilibrium is a state in which market supply and demand are balanced and in relative stability, and prices remain relatively constant. In physics, equilibrium is a state in which all forces acting on a body cancel each other out, leading to a state of rest or motionlessness. In both cases, equilibrium represents a stable state, and any changes to the system will disrupt it.
The total pressure in the container at equilibrium is then equal to the sum of the partial pressures of each component, which is 0.225 + 0.182975 + 0.182975 = 0.59095 atm.
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Rank the compounds above based on increasing intermolecular forces. C2H6, CH3F, CH4, NH3
Answers
Answer:
The intermolecular forces increase in the following order:
C2H6 < CH4 < CH3F < NH3
The reasoning behind this order is as follows:
C2H6 (ethane) is a nonpolar molecule with only dispersion forces, which are the weakest intermolecular forces.
CH4 (methane) is also nonpolar and only has dispersion forces, but it has a slightly larger molecular weight than ethane, which leads to stronger dispersion forces.
CH3F (fluoromethane) is polar and has dipole-dipole forces in addition to dispersion forces. The dipole-dipole forces are stronger than the dispersion forces in this case.
NH3 (ammonia) is also polar and has hydrogen bonding, which is a stronger type of dipole-dipole force.
Explanation:
How does photo synthesis and cellular respiration show evidence of the law of conservation of matter
Answers
Answer:
Photosynthesis produces glucose, then cellular respiration uses it to make energy along with carbon dioxide. The energy from the glucose is conserved because it doesn't get destroyed
Answer:
Photosynthesis produces glucose, then cellular respiration uses it to make energy along with carbon dioxide. The energy from the glucose is conserved because it doesn't get destroyed.
If 5.33x10>23 molecules of hydrogen react with excess chlorine, how many grams of hydrogen chloride gas will be formed?
(b) How many liters of hydrogen chloride gas will form at STP?
Answers
This will result in the formation of 64.7 grammes of hydrogen chloride gas.
How much hydrogen chloride gas will form at STP, in terms of litres?The 22.4 litre of Cl2 C l 2 gas produces 44.8 litre of HCl gas, therefore the 22.4 litre of Cl2 C l 2 gas will make 0.050 litre of HCl gas, or 22.4 44.8 0.050 0.025 litres.
Hydrogen chloride is created when chlorine and hydrogen interact.
H2 + Cl2 → 2HCl
To convert HCl's molar mass to grammes:
Number of moles of H2 = 5.33 x 10²³ / Avogadro's number
= 5.33 x 10²³ / 6.022 x 10²³
= 0.888 moles of H2
Number of moles of HCl = 2 x number of moles of H2
= 2 x 0.888
= 1.776 moles of HCl
Mass of HCl = number of moles of HCl x molar mass of HCl
= 1.776 x 36.46 (molar mass of HCl)
= 64.7 grams of HCl
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If a reaction starts with 4 Cu atoms, 5 0 atoms, and 10 H atoms, what is known about the products?
A. The products will contain no oxygen because it is a gas.
B. The products will contain 4 Cu atoms and 5 H₂O molecules.
C. The products will contain 4 Cu atoms, 5 0 atoms, and 10 H atoms
D. The products will contain 19 atoms of unknown type.
Answers
Answer:
B. The products will contain 4 Cu atoms and 5 H₂O molecules.
Explanation:
C. The products will contain 4 Cu atoms, 5 0 atoms and 10 H atoms.
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Calculate the initial rate for an experiment where both I2
and OCl2 are initially present at 0.15 mol/L.
Answers
When both I2 и OCl2 are present in 0.15 mol/L at the beginning of the experiment, the starting rate is roughly 0.004 M/s.
Provide a concrete illustration of an experiment.An experiment is described as "a test under controlled circumstances that is made to explain a known truth, to examine the validity of a theory, or even to determine the efficacy from something yet untried" on the inside of the American Heritage Dictionary on the English Language.
How might an experiment be described?If you sprinkle a plant with water, will it grow more effectively? Compare the plant's development before and after spraying it to get a sense of how it is developing without it.
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A piece of gold (c = 0.129 J/g°C) with mass of 45.5 g and a temperature of 80.5°C is dropped into 192 g of water at 15.0C. What is the final temperature of the water? (Hint: Use the equation qw = -qg.)
Answers
According to the solving the final temperature of the water is 15.317°C.
What does the phrase "change in temperature" signify in chemistry?When heat flows through an area, the temperature changes, either rising or falling. By examining the reaction and determining if it is endothermic or exothermic, it is possible to determine that this alters chemical equilibria towards the products or reactants.
According to the given information:Q lost by gold = Q gained by water
where Q is the heat absorbed or lost, which can be calculated using:
Q = m * c * ΔT
where m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
First, let's calculate the heat lost by the gold:
Q lost by gold = m * c * ΔT
= 45.5 g * 0.129 J/g°C * (80.5°C - 15.0°C)
= 231.1 J
This heat is gained by the water, so:
Q gained by water = 231.1 J
Using the same formula for the water, we can calculate the final temperature:
Q gained by water = m * c * ΔT
231.1 J = 192 g * 4.184 J/g°C * (T - 15.0°C)
T - 15.0°C = 0.317°C
T = 15.0°C + 0.317°C
T = 15.317°C
the final temperature of the water is 15.317°C.
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A 9.10 L
container holds a mixture of two gases at 43 °C.
The partial pressures of gas A and gas B, respectively, are 0.264 atm
and 0.548 atm.
If 0.130 mol
of a third gas is added with no change in volume or temperature, what will the total pressure become?
Answers
Answer:
we can use the ideal gas law equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
First, we can find the total number of moles of gas in the container:
n(total) = n(A) + n(B)
To find the number of moles of each gas, we can use the partial pressures and the total pressure:
P(A) / P(total) = n(A) / n(total)
P(B) / P(total) = n(B) / n(total)
We can rearrange these equations to solve for n(A) and n(B):
n(A) = P(A) / P(total) × n(total)
n(B) = P(B) / P(total) × n(total)
We know that the partial pressures of gas A and gas B are 0.264 atm and 0.548 atm, respectively, and we can find the total pressure by adding these partial pressures:
P(total) = P(A) + P(B) = 0.264 atm + 0.548 atm = 0.812 atm
We can also find the total number of moles of gas in the container:
n(total) = PV / RT = (0.812 atm) × (9.10 L) / (0.08206 L·atm/mol·K × 316 K) = 0.286 mol
Now we can add 0.130 mol of a third gas, which gives us a new total number of moles of gas:
n(new) = n(total) + 0.130 mol = 0.286 mol + 0.130 mol = 0.416 mol
Since there is no change in volume or temperature, the new total pressure will be proportional to the total number of moles of gas:
P(new) = P(total) × n(new) / n(total) = (0.812 atm) × (0.416 mol) / (0.286 mol) = 1.18 atm
Therefore, the total pressure will become 1.18 atm.
The specific heat capacity of wood is 1.76 J/g °C. The specific heat capacity of steel is
0.47 J/g °C. Which material is the better conductor of heat?
Answers
Answer:
The specific heat capacity of a substance represents the amount of energy required to raise the temperature of 1 gram of that substance by 1 degree Celsius. A material with a lower specific heat capacity will require less energy to raise its temperature than a material with a higher specific heat capacity.
Therefore, steel is the better conductor of heat because it has a lower specific heat capacity than wood. Steel can transfer heat more quickly than wood due to its lower specific heat capacity.
Explanation:
A cart carrying a brick is pulled up an inclined plane. At what point does the cart have the LEAST amount of potential energy? Check photo to see answer choices.
Answers
The least point in this diagram, A, is where a cart pulling a brick is being dragged up an inclined surface.
How is potential energy influenced?This energy can be utilized later to move an item since it can be stored and utilized at a later time. Gravitational Three things affect potential energy: mass, gravity, and elevation. These three variables are directly inversely related to energy.
What is the straightforward meaning of potential energy?Potentially energy is a type of energy that depends on how various system elements interact with one another. A spring's potential energy rises when it is compressed or stretched. A steel ball has more potential energy if it is raised just above earth as opposed to dropping to it.
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PLEASE HELP
1) When 33 g of a metal at 89 ◦C is added to
43 g of water at 21 ◦C, the temperature of the
water rises to 30 ◦C. What is the specific heat
capacity of the metal? Assume no heat was
lost to the surroundings.
Answer in units of J
g ·
◦C
2) A 15 kg piece of zinc at 66◦C is placed in a
container of water. The water had a mass of
39 kg and a temperature of 17◦C before the
zinc was added.
What is the final temperature of water and
zinc? The specific heat of zinc is 388 J/kg ·
◦ C
and of water 4180 J/kg ·
◦ C.
Answer in units of ◦C.
3) Calculate the amount of heat required to convert 94 g of ice at −31◦C to steam at 143.6
◦C.
Answer in units of kJ
Answers
The amount of heat required to convert 94 g of ice at -31◦C to steam at 143.6◦C is 2.32 kJ.
What is amount?Amount is a monetary measurement of value. It is a numerical value assigned to goods, services, and other transactions that indicate their worth in a currency. Amounts are used to quantify the size of a purchase or sale, and to determine the cost or value of an item. Amounts are also used to track debts, credits, investments, and other financial transactions.
This can be calculated using the formula for heat, Q = mCΔT, where m is the mass of the object, C is the specific heat capacity, and ΔT is the change in temperature. In this case, m is 94 g, C is 4.184 J/g · ◦C for water, and ΔT = 174.6◦C. Therefore, Q = 94 × 4.184 × 174.6 = 2.32 kJ.
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