CHEMISTRY: A Study of Matter - Weebly

Worksheet: Mole/Mole Problems

Name________K_E_Y_________

Answer each of the following questions using the equation provided. BE SURE TO BALANCE EACH EQUATION BEFORE SOLVING ANY PROBLEMS. SHOW ALL WORK.

1.

__2 _NO + ___O2

__2_NO2

a. 2 moles of NO will react with ____1__ mole(s) of O2 to produce ____2__ mole(s) of NO2.

b.

? moles NO = 3.6 moles O

2

2

?

2 moles NO 2 =

1

moles O 2

7.2 moles NO2

c. How many moles of NO must react to form 4.67 moles of NO2?

2 mol NO ? mol NO = 4.67 mol NO2 ? 2 mol NO = 4.67 mol NO

2

2. _4__NH3 + __3_O2 __2_N2 + __6_H2O

a. 20 moles of NH3 are needed to produce ___3_0__ moles of H2O.

6 mol H O

? mol H2O = 20 mol NH3

?

2

4 mol NH

= 30 mol H2O

3

b. How many moles of N2 will be produced if 3.5 moles of O2 react?

2 mol N

? mol N2 = 3.5 mol O2

?

2

3 mol O

= 2.3 mol N2

2

CHEMISTRY: A Study of Matter

? 2004, GPB

8.7a

3. __4 _AlF3 + __3_O2 __2_Al2O3 + __6 _F2

a. 20 moles of AlF3 will produce ___3_0__ moles of F2.

6 mol F

? mol F2 = 20 mol AlF3

?

2

4 mol AlF3

= 30 mol F2

b. ___0._8 __ moles of AlF3 will react with 0.6 moles of O2.

? mol AlF3 = 0.6 mol O2

?

4 mol AlF3 3 mol O

= 0.8 mol AlF3

2

4. ___C3H8 + __5_O2 __3_CO2 + __4_H2O

a. How many moles of oxygen react with 11 moles of C3H8?

? mol O2 = 11 mol C3 H8

?

5 mol O2 1 mol C3 H8

= 55 mol O2

b. How many moles of CO2 are produced if 3.5 moles of water are produced?

? mol CO2 = 3.5 mol H2O

?

3 mol CO2 4 mol H O

= 2.6 mol CO2

2

5. __3_O2 + __4_Fe

__2 _Fe2O3

a. Fill in the following word equation--__t_hr_ee__ moles of oxygen gas react with __f_ou_r__ moles of iron to produce __t_wo__ moles of iron (III) oxide.

b. ___2___ moles of O2 are required to produce 3.0 moles of iron (III) oxide.

? mol O2 = 3.0 mol Fe2O3

?

3 mol O2 2 mol Fe O

= 4.5 mol O2

23

CHEMISTRY: A Study of Matter

? 2004, GPB

8.7b

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