Mole Ratio
1 and 2 step conversions
3 step conversions
Limiting Reactant
Percent Yield
100
2 NaCl + F2 --> 2 NaF + Cl2
What is the mole ratio between NaF and Cl2?
2 mole NaF = 1 mole Cl2
100
1 N2 + 3 H2 --> 2 NH3
Convert 15 mole of H2 to moles of NH3
10 moles NH3
100
1 N2 + 3 H2 --> 2 NH3
Convert 34 grams of NH3 to grams of H2
6 grams H2
100
You have 10 H and 3 N and you need to make as many NH3 as possible.
What is your limiting reactant?
N --> you can only make 3 NH3 before you run out of H
100
150 grams of a substance were needed but only 87 grams were produced. What is the percent yield?
58%
200
2 NaCl + F2 --> 2 NaF + Cl2
What is the mole ratio between NaF and NaCl?
2 mole NaF = 2 mole NaCl
200
1 N2 + 3 H2 --> 2 NH3
Convert 12 mole of N2 to moles of NH3
24 moles NH3
200
1 N2 + 3 H2 --> 2 NH3
Convert 18 grams of H2 to grams of N2
84 grams of N2
200
You're making as many grilled cheese sandwiches as you possibly can with the ingredients you have at home (seen in picture).
What is the limiting reactant -- what ingredient do you run out of first?
bread
200
100 grams of a substance were made but 250 grams were needed. What is the percent yield?
40%
300
2 NaCl + F2 --> 2 NaF + Cl2
What is the mole ratio between F2 and NaF?
1 mole F2 = 2 mole NaF
300
1 N2 + 3 H2 --> 2 NH3
Convert 20 moles of NH3 to moles of H2
30 moles H2
300
1 N2 + 3 H2 --> 2 NH3
Convert 13.44 L of H2 to liters of NH3
8.96 L of NH3
300
What is the limiting reactant in this image?
Oxygen
300
A lab produced 291 grams but should have been able to make 300 grams. What is the percent yield?
97%
400
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
What is the mole ratio between oxygen and water?
25 moles O2 = 18 mole H2O
400
1 N2 + 3 H2 --> 2 NH3
Convert 6 moles of H2 to liters of NH3
89.6 L of NH3
400
1 N2 + 3 H2 --> 2 NH3
Convert 67.2 L of N2 to L of NH3
134.4 L of NH3
400
2 NaCl + F2 --> 2 NaF + Cl2
If you have 4 moles of NaCl and 4 moles of F2, what is the most amount of Cl2 that can be made AND what is the limiting reactant?
2 moles of Cl2 is the most that can be made, the limiting reactant is NaCl
400
A chemical reaction should have produced 450 grams of a substance, but the chemist only produced 202.5 grams. What is the percent yield?
45%
500
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
What is the mole ratio between C8H18 and CO2??
2 mole C8H18 = 16 mole CO2
500
1 N2 + 3 H2 --> 2 NH3
Convert 6 moles of NH3 to grams of N2
84 g N2
500
1 N2 + 3 H2 --> 2 NH3
Convert 67.2 L of N2 to grams of NH3
102 grams NH3
500
** Toughest Question **
2 NaCl + F2 --> 2 NaF + Cl2
Ms. Piskor wants to make NaF for a lab. The chemical room only has 29 grams of NaCl and 13.44 L of F2.
What is the most amount of moles of NaF that Ms. Piskor will be able to make?
0.5 moles --> 29 g of NaCl can only make 0.5 moles, so after the 29 grams are used up, no more NaF can be made
500
A procedure should have made 675 grams of a substance, but a chemist only produced 101.25 grams. What is the percent yield?
15%