How many grams of water are produced when 8.25 mol hydrogen reacts with hydrogen? H2 + O2 --> H2O

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03-12-2021
Chemistry

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How many grams of water are produced when 8.25 mol hydrogen reacts with hydrogen? H2 + O2 --> H2O

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StudiousStud3ntidn StudiousStud3ntidn · Answer 1 · 2021-12-03T21:38:02-05:00

Answer:

148.7grams

Explanation:

We need to balance the equation first

2H2 + O2 --> 2H2O

now we set up a mole ratio where we know the mole ratio of hydrogen is 2 and the mole ratio of water is 2 as well. SInce the moles are the same, nH2O = nH2

now we can calculate mass

(m is mass of water, n is moles of water, M is molecular mass of water)

molecular mass of H2O can be found by adding atmoic mass of 2 hydrogen and one oxygen (1.01+1.01+16.00)

n = m/M rearrange to m = n*M

m = 8.25mol*18.02mol

m = 148.665g

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