Stoichiometry

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Stoichiometry

Mixed Stoichiometry Problems

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Use this balanced equation for problems 1-3

2 Na + Pb(NO3)2 --> 2 Na(NO3) + Pb

1. If you start with 5 moles of Na, how many moles of Pb will be produced? *

1 point

1 mole

5 moles

2.5 moles

10 moles

2. If you start with 5 grams of Na, how many grams of Pb will be produced? *

1 point

0.5 g

113 g

23 g

5 g

3. If you start with 10 grams of Na, how many moles of Pb will be produced? *

1 point

0.22 moles

0.435 moles

1 mole

2 moles

Use this equation to answer questions 4-7.

C3H8 + 5O2 --> 3CO2 + 4H2O

4. You need 100 moles of H2O. How many moles of C3H8 do you start with? *

1 point

6.25 moles

25 moles

400 moles

Need more info

5. You need to make 100 grams of H2O. How many grams of C3H8 do you start with? *

1 point

25 g

44 g

61 g

121 g

6. How many liters of O2 are needed to make 1000 grams of H2O *

1 point

22.4 liters

1000 liters

996 liters

1556 liters

7. Mr Kolias burned 2000 grams of C3H8 riding around on his motorcycle, How many liters of CO2 did it give off? *

1 point

136 liters

3054 liters

4073 liters

5185 liters

Use this equation to answer questions 8-10

16Cu + S8 --> 8Cu2S

8. How many moles of Cu2S are formed when starting with 8 moles of Cu? *

1 point

9. How many molecules of Cu2S are formed when starting with 8 moles of Cu? *

1 point

4.8 x 10^24

6.8 x 10^24

1.2 x 10^24

2.4 x 10^24

10. The coefficients 16, 1, 8 DO NOT represent...

1 point

moles

atoms or molecules

grams

Clear selection

11. How many liters of S are formed when starting with 32 liters of Cu2S? *

1 point

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