Determine the mass of hydrogen that will be required to interact with oxygen weighing 8 grams.

univerkov | January 17, 2021 | education

Given:
m (O2) = 8 g
To find:
m (H2)
Decision:
2H2 + O2 = 2H2O
n (O2) = m / M = 8 g / 32 g / mol = 0.25 mol
n (O2): n (H2) = 1: 2
n (H2) = 0.25 mol * 2 = 0.5 mol
m (H2) = n * M = 0.5 mol * 2 g / mol = 1 g
Answer: 1 g

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