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Mole Ratio and Conversions

Total questions: 9

Worksheet time: 15mins

Name
Class
Date
1.

4NH+ 5O2-->4NO + 6H2O
What is the number of moles of H2O produced when 12 mole of NH3 is consumed? USE SCRATCH PAPER TO WORK OUT THE PROBLEM LIKE IN YOUR NOTES/HAND IN YOUR SCRATCH WHEN DONE WITH QUIZZIZ

a)
15
b)
18
c)
20
d)
24
2.

6CO2 + 6H2O --> C6H12O6 + 6O2 
What is the number of moles of water needed to make 2.5 moles of C6H12O6?

a)
2.5
b)
6
c)
12
d)
15
3.
3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe
What is the Ratio of moles of Mg to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
4.

Which of the following represent a mole ratio (FRACTION) between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag

a)
2 mol AgNO3 / 2 mol Ag
b)
2 mol Ag / 2 mol AgNO3 
c)
2 mol AgNO3 / 2 mol Cu(NO3)2
d)
2 mol AgNO3 / 1 mol Cu(NO3)2
5.

Where are the numbers for a mole ratio found?

a)

They are part of the chemical formulas for the reactants / products.

b)

They are given in the problem.

c)

They are found on the periodic table for those elements.

d)

They are found as coefficients in the reaction's balanced chemical equation.

6.

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

Ethane (C2H6) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

a)
b)
c)
d)
7.
What do the coefficients need to be in the following equation in order to be balanced?
_Mg + _Cl→ _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
8.
Balance this equation:
Al2O3 -> Al + O2 
a)
2Al2O3 -> 2Al + 3O2 
b)
2Al2O3 -> 4Al + 3O2 
c)
3Al2O3 -> 2Al + O2 
d)
2Al2O3 -> 3Al + 2O2 
9.

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

problem: How many moles of ethane (C2H6) are required to produce 13.5 moles of water from the above reaction?

a)

4.5 mol C2H6

b)

27 mol C2H6

c)

40.5 mol C2H6

d)

81 mol C2H6

e)

162 mol C2H6