WorksheetsStoichiometry
Total questions: 13
Worksheet time: 1hrs 5mins
2H2 + O2 → 2H2O How many moles of oxygen are needed if 8 moles H2 are used?
3mol Mg : 2 mol Fe
2 mol Mg : 3 mol Fe
1 mol Fe : 2 mol Fe
3 mol MgO : 2 mol Fe
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
2Na + 2H2O → 2NaOH+ H2 How many grams of hydrogen are produced if 120 g of Na are available? M(Na)= 23 g.mol-1 M (H) = 1 g.mol-1
5.22 g
2.67 g
45.0 g
Cl2 + 2 KBr → Br2 + 2 KCl How many grams of potassium chloride can be produced from 356 g of chlorine? M(Cl)= 35.5 g.mol-1 M(K)= 39 g.mol-1
747 g
CH4 + 2 O2 → CO2 + 2 H2O How many moles of carbon dioxide are produced from the combustion of 110 g of CH4? M(C)= 12 g.mol-1 M(H) = 1 gmol-1
6.88 mol
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2? M(O2)= 32 gmol-1
B2H6 + 3O2 -->2 HBO2 + 2 H2O What mass of O2 will be needed to burn 36.1 g of B2H6? M(O)= 16 g.mol-1 M(B)= 11 g.mol-1 M(H) = 1 gmol-1
CH4 + 4 Cl2 → CCl4 + 4 HCl
If 437 g of HCl is produced, how many moles of HCl were there? M(HCl) = 36.5 gmol-1
10
13
12
16
CH4 + 4 Cl2 → CCl4 + 4 HCl
When do we use the coefficients in front of these compounds?
When finding the mass of one mole of a compound.
When finding the total mass that we have of a compound.
When determining the number of moles of unknown compounds by comparing ratios.
When finding the number of moles from a mass of a known compound.
CH4 + 4 Cl2 → CCl4 + 4 HCl
If 12 moles of HCl are produced, how many moles of CH4 were used in this reaction?
1
3
4
12
CH4 + 4 Cl2 → CCl4 + 4 HCl
If we have 12 moles of HCl come out of the reaction, how many moles of Cl2 had to go in to the reaction?
1
4
6
12
CH4 + 4 Cl2 → CCl4 + 4 HCl
If we have 3 moles of CH4 go in to the reaction, how many grams of CH4 was there? M(C) = 12 gmol-1 M(H) = 1 gmol-1
32.0 g
16.0 g
48.0g
49.0g
