Stoichiometry Question Preview (ID: 46410)


Chapter 12 Test. TEACHERS: click here for quick copy question ID numbers.

What is the percent yield of product if you produce 15.3 g of product in the lab and your theoretical yield is 13.1g?
a) 85.6%
b) 117%
c) .856%
d) 116%

Which of the follow is a balanced chemical reaction?
a) C8H20 (l) + O2 (g) → CO2 (g) + H2O (l)
b) C8H20 (l) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (l)
c) 2 C8H20 (l) + 13 O2 (g) → 10 CO2 (g) + 8 H2O (l)
d) C8H20 (l) + 7 O2 (g) → 8 CO2 (g) + 10 H2O (l)

Which of the follow is a balanced chemical reaction?
a) 2 Pb(NO3)2 (aq) + 4 NaI (aq) → 2 PbI2 (s) + 4 NaNO3 (aq)
b) Pb(NO3)2 (aq) + NaI (aq) → PbI2 (s) + NaNO3 (aq)
c) Pb(NO3)2 (aq) + 2 NaI (aq) → PbI2 (s) + 2 NaNO3 (aq)
d) 2 Pb(NO3)2 (aq) + 3 NaI (aq) → 2 PbI2 (s) + 3 NaNO3 (aq)

If you end up with 70.4% yield, how much sodium nitrate did you make in lab if your theoretical yield is 8.52g of sodium nitrate?
a) 6.00g sodium nitrate
b) 8.52g sodium nitrate
c) .704g sodium nitrate
d) 25.0g sodium nitrate

If you end up with 65.3% yield, how much zinc sulfate did you make in lab if your theoretical yield is 201g of zinc sulfate?
a) 65.3g zinc sulfate
b) 161g zinc sulfate
c) .653g zinc sulfate
d) 131g zinc sulfate

What is the theoretical yield of water if you begin a combustion reaction with 25.6g of C8H20 and 17.2g of oxygen gas?
a) 77.5g water
b) 14.6g water
c) 7.45g water
d) 18.0g water

If your theoretical yield is 14.6g of carbon dioxide, and you mass out 5.23g of carbon dioxide in lab, what is your percent yield?
a) 70.2%
b) 35.8%
c) 279%
d) .358%

What is the theoretical yield of carbon dioxide if you begin a combustion reaction with 25.6g of C8H20 and 17.2g of oxygen gas?
a) 77.5g carbon dioxide
b) 14.6g carbon dioxide
c) 7.45g carbon dioxide
d) 44.1g carbon dioxide

In the lab, you perform a combustion reaction. 2 C2 H6 (l) + 7 O2 (g) → 4 CO2 (g) + 6 H2 O(l) If 35.65 g of C2H6 and 45.27 g oxygen were used how much carbon dioxide was formed?
a) 104.4g carbon dioxide
b) 35.58g carbon dioxide
c) 35.62g carbon dioxide
d) 45.27g carbon dioxide

The reaction of calcium hydroxide and sulfuric acid yields calcium sulfate and water. You begin with 2.305 g of calcium hydroxide and 5.347 g of sulfuric acid. • Write the chemical reaction and balance from the word chemical reaction above.
a) Ca(OH)2 (aq) + H2SO4 (aq) → 2 CaSO4 (s) + 2 H2O (l)
b) CaOH (aq) + HSO4 (aq) → CaSO4 (s) + H2O (l)
c) CaOH (aq) + H2S (aq) → CaS (s) + 2 H2O (l)
d) Ca(OH)2 (aq) + H2SO4 (aq) → CaSO4 (s) + 2 H2O (l)

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