Water can undergo a decomposition reaction, as shown in the following balanced equation. 2H2O(g) → 2H2(g) + O2(g) How many grams of oxygen gas O2 will be formed by the decomposition of 72.0 g of water vapor (H2O)?
- Water can undergo a decomposition reaction, as shown in the following balanced equation. 2H2O(g) → 2H2(g) + O2(g) How many grams of oxygen gas O2 will be formed by the decomposition of 72.0 g of water vapor (H2O)? Show all work. (5 marks)
(1) balance equation, list Givens, and Molar mass (M)
2 H2O(g) → 2 H2(g) + O2(g)
m = 72.0 g _______ = m
M = _______ _______ = M
n = _______ _______ = n
(2) convert mass of given (m) to amount of given (n) ***Use molar mass (M)
(3) convert the amount of given (n) to the amount of required. ***Use mole ratios
(4) convert the amount of required substance to required mass ***Use molar mass (M)
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