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How many grams of hydrogen are in 46 g of CH4OH?

Answer is 6.97



2 Answers

4 votes

Answer is: 6.97 grams grams of hydrogen.

m(CH₄OH) = 46 g; mass of compound.

M(CH₄OH) = Ar(C) + 5·Ar(H) + Ar(O) · g/mol.

M(CH₄OH) = 12 + 5 · 1 + 16 · g/mol.

M(CH₄OH) = 33 g/mol; molar mass.

n(CH₄OH) = m(CH₄OH) ÷ M(CH₄OH).

n(CH₄OH) = 46 g ÷ 33 g/mol.

n(CH₄OH) = 1.4 mol.

In one molecule of CH₄OH, there are five atoms of hydrogen:

n(CH₄OH) : n(H) = 1 : 5.

n(H) = 5 · 1.4 mo.

n(H) = 6.97 mol.

m(H) = n(H) · M(H).

m(H) = 6.97 mol · 1 g/mol.

n(H) = 6.97 g.

User Jdsurya
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7.1k points
4 votes
No! The answer is 5.75 g
Below is the solution.
How many grams of hydrogen are in 46 g of CH4OH? Answer is 6.97-example-1
User Saagar
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7.4k points