AnswersCISD-Chemistry B-CRUnit Test

Gas Laws Answers

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The balanced equation below shows the products that are formed when butane (C4H10) is combusted. 2C4H10 + 13O2 8CO2 + 10H2OWhat is the mole ratio of butane to carbon dioxide?

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A
2:8
B
1:5
C
13:8
D
13:10
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Consider the reaction below.2H2 + O2 2H2OHow many moles of water are produced from 13.35 mol of oxygen?

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A
6.675 mol
B
26.70 mol
C
53.40 mol
D
66.75 mol
23

What is Avogadro’s number?

A
the number of atoms in exactly 14.00 g of carbon-12
B
the number of atoms in a kilogram of any substance
C
the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance
D
the number of atoms, molecules, ions, formula units, or other particles in a gram of a substance
24

The balanced chemical equation for the reaction of copper (Cu) and silver nitrate (AgNO3) is shown below.Cu + 2AgNO3 2Ag + Cu(NO3)2How many moles of copper must react to form 3.50 mol of Ag?

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A
0.175 mol
B
1.75 mol
C
7.00 mol
D
17.0 mol
25

Which statement correctly describes the relationship between reactant and yield?

A
The actual yield is calculated from the amount of the excess reactant present.
B
The actual yield is calculated from the amount of the limiting reactant present.
C
The theoretical yield is calculated from the amount of the excess reactant present.
D
The theoretical yield is calculated from the amount of the limiting reactant present.

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