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Balancing Equations
Limiting Reactant
MM & Mole Ratio Conversions
Theoretical Yield
Percent Yield
100

__Cl2 + __KI --> __I2 + __KCl

What is Cl2 + 2KI --> I2 + 2KCl

100

The limiting reactant if 5 mol of H2 and 6 mol of O2 react as 2H2 + O2 --> 2H2O

What is H2?

100
When converting from moles to grams you _______ by the molar mass
What is multiply
100

CH4  +  2O2  →  CO2  +  2H2O
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.

66 grams CO2

100

What is the formula for finding percent yield?

What is (actual yield / theoretical yield)x 100 = percent yield.

200

__Cu2 + __S --> __Cu + __S

What is Cu2 + S--> 2Cu + S

200

The limiting reactant if 7 mol of H2 and 6 mol of O2 react as 2H2 + O2 --> 2H2O.

What is H2?

200
Number of grams in 88.1 moles of magnesium
What is 2140 grams
200

Given the reaction
Na2S(aq) + 2AgNO3(aq) → Ag2S(s) + 2NaNO3(aq)
How many grams of Ag2S will form when 3.94 g of AgNO3 and an excess of Na2S are reacted together?

2.87 g of Ag2S will be produced from 3.94 g of AgNO3

200

What is the percent yield if you have an actual yield of 143g of H and a theoretical yield of 167g of H. Calculate to one decimal place.

What is 85.6%.

300

__CaF2 + __H2SO4 --> __CaSO4 + __HF

What is CaF2 + H2SO4 --> CaSO4 + 2HF

300

If H2 is the limiting reactant in the reaction 2H2 + O2 --> 2H2O, oxygen would be known as this kind of reactant.

What is "excess reactant"?

300

MgF2 + Na2O --> MgO + 2 NaF


Given the balanced chemical equation above, how many moles would you need of sodium oxide (Na2O) to make 4.5 moles of NaF?

What is 2.25 moles

300

If 4.50 g of HCl are reacted with 15.00 g of CaCO3, according to the following balanced chemical equation, calculate the theoretical yield of CO2. 

2HCl + CaCO3 → CaCl2 + H2O + CO2

2.71g CO2

300

2Fe2O3  +  C  →  Fe  +  3CO2
You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2? (Hint: calculate theoretical yield of CO2 first)

15.8%

400

__BaO + __Al --> __Al2O3 + __Ba

What is 3BaO + 2Al --> Al2O3 + 3Ba

400

DOUBLE JEOPARDY: The mole ratio of silicon carbide to carbon monoxide in SiO2 + C --> SiC + CO. (balance first)

What is 1:2?

400
Number of moles in 68 grams of copper (II) hydroxide
What is 0.70 moles
400

For the balanced equation shown below, if 93.8 grams of PCl5 were reacted with 20.3 grams of H2O, how many grams of H3PO4 would be produced?

PCl5 + 4 H2O => H3PO4 + 5 HCl

27.63 grams of H3PO4

400

Produced from 16 g H2 ( molar mass: 2.01588), the actual yield of H2O (molar mass: 18.0153) is 138 g. What is the percent yield? Round to one decimal place. 

2H2+O2=2H2O

What is 96.7%.

500

__CuSO4 + __KI --> __CuI + __I2 + __K2SO4

What is 2CuSO4 + 6KI --> 2CuI + I2 + 2K2SO4

500

The limiting reactant if 755 g chromium reacts with an excess of phosphoric acid to form chromium phosphate as follows: 2Cr + 2H3PO4 --> 3H2 + CrPO4.

What is chromium?

500

Mg(s) + H2O(l)  -->  MgO(aq) + H2(g)


Given the balanced chemical equation above, how many moles of hydrogen gas (H2) would you produce if 7.8 moles of magnesium reacted with excess water?

What is 7.8 moles of H2

500

For the balanced equation shown below, if 18.3 grams of C2H5Cl were reacted with 37.3 grams of O2, how many grams of Cl2 would be produced?

4 C2H5Cl + 13 O2 => 8 CO2 + 10 H2O + 2 Cl2

10.1 grams of Cl2

500

What is the percent yield of the following reaction if 60 grams of CaCO3(100.087) produces 15 grams (actual yield) of CaO(56.0774)? CaCO3→CaO + CO2

What is 44.6% .