Answer
Answer: 11.02 grams of gas
Work Step by Step
1. Use the Law of Conservation of Mass.
2. .85 grams of wood + 9.45 grams of air = .28 grams ash + (unknown)
3. Due to the Law of Conservation of Mass, the mass of the reactants (wood + air) must equal the product.
4. .85 grams wood + 9.45 grams air = 11.3 grams of reactant
5. .28 grams ash produced + x amount of gas = 11.3 grams of reactant
6. 11.3 grams of reactant - .28 grams of ash = x amount of gas
7. 11.02 grams of gaseous product = x amount of gas