Mole - Gram Conversions

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Problem

Determine the mass in grams of 3.60 mol of H₂SO₄.

Solution

First, look up the atomic masses for hydrogen, sulfur, and oxygen from the Periodic Table. The atomic mass is 1.008 for H; 32.06 for S; 16.00 for O. The formula mass of H₂SO₄ is:

2(1.008) + 32.06 + 4(16.00) = 98.08

Thus, one mole of H₂SO₄ weights 98.08 grams. This relation provides a conversion factor to go from grams to moles. Using the factor 98.08 g / 1 mol:

grams H₂SO₄ = 3.60 mol x 98.08 g / 1 mol = 353 g H₂SO₄

Answer

353 g H₂SO₄

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