Homework Answers
when -185.0 KJ of heat is involved, 1 mol of H2 is reacting
So,
for -44.6 KJ, mol of H2 = -44.6*1/-185.0 KJ
= 0.2411 mol
Molar mass of H2 = 2.016 g/mol
use:
mass of H2,
m = number of mol * molar mass
= 0.2411 mol * 2.016 g/mol
= 0.486 g
Answer: 0.486 g
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