Fe + S → FeS

0.8 moles of Fe are allowed to react an excess of S. What is the mass of FeS produced?

(A_r of Fe = 56, A_r of S = 32)

2CO + O₂ → 2CO₂

What is the mass of CO₂ produced by reacting 2 moles of O₂ with an excess of CO?

(A_r of C = 12, A_r of O = 16)

2H₂ + O₂ → 2H₂O

How many moles of water can be made from 100 g of hydrogen?

(A_r of H = 1, A_r of O = 16)

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

What is the mass of C₂H₆ used to produce 2 moles of CO₂?

(A_r of C = 12, A_r of H = 1, A_r of O = 16)

CH₄ + 2O₂ → CO₂ + 2H₂O

24 g of CH₄ will produce how many grams of CO₂?

(A_r of C = 12, A_r of H = 1, A_r of O = 16)

Zn + 2HCl → ZnCl​₂ ​​+ H​₂​​

When 14.6 g of HCl is used, what is the mass of H₂ produced?

(A_r of H = 1, A_r of Cl = 35.5)

2NaClO₃ → 2NaCl + 3O₂

What is the mass of O₂ produced from 213 g of NaClO₃?

(A_r of Na = 23, A_r of Cl = 35.5, A_r of O = 16)

2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂

What is the mass of aluminum sulfate formed if 147 g of sulfuric acid completely reacted with aluminum?

(A_r of Al = 27, A_r of H = 1, A_r of S =32, A_r of O = 16)

CuCl₂ + 2NaOH → Cu(OH)₂ + 2NaCl

After adding an excess of aqueous NaOH to 54 g of aqueous CuCl₂, what is the mass of Cu(OH)₂ obtained?

(A_r of Cu = 64, A_r of Cl = 35.5, A_r of Na = 23, A_r of O = 16, A_r of H = 1)