What mass of h2o is formed when h2 reacts with 384 grams of o2?

Question

Chemistry

Amira

22 April, 10:05

What mass of h2o is formed when h2 reacts with 384 grams of o2?

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Answers (1)

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Irene Walton · Answer 1

Answer is: mass of water is 432 grams.

Chemical reaction: 2H₂ + O₂ → 2H₂O.

m (O₂) = 384 g.

M (O₂) = 2 · 16 g/mol = 32 g/mol, molar mass.

n (O₂) = m (O₂) : M (O₂).

n (O₂) = 384 g : 32 g/mol.

n (O₂) = 12 mol, amount of substance.

From chemical reaction: n (O₂) : n (H₂O) = 1 : 2.

n (H₂O) = 12 mol · 2 = 24 mol.

m (H₂O) = n (H₂O) · M (H₂O).

m (H₂O) = 24 mol · 18 g/mol.

m (H₂O) = 432 g.