If you burn 45.2g of hydrogen and produce 404g of water, how much oxygen reacted

Explanation:

1. Write the balanced equation:

2. Find the quantity of produced by 45.2g of hydrogen:

So, 45.2g of produce 404g of

3. Find the quantity of that reacted with 45.2g of :

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

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