Answer:
65.25%
Step-by-step explanation:
To determine the percent composition of oxygen in H₂SO₄, we need to calculate the mass of oxygen relative to the total molar mass of H₂SO₄ and express it as a percentage.
Step 1: Calculate the molar mass of H₂SO₄.
H₂SO₄ consists of two hydrogen atoms (H), one sulfur atom (S), and four oxygen atoms (O). The atomic masses of these elements are:
H = 1.01 g/mol
S = 32.07 g/mol
O = 16.00 g/mol
Molar mass of H₂SO₄ = (2 × H) + S + (4 × O)
= (2 × 1.01) + 32.07 + (4 × 16.00)
= 98.09 g/mol
Step 2: Calculate the mass of oxygen in H₂SO₄.
Since there are four oxygen atoms in one molecule of H₂SO₄, the mass of oxygen is:
Mass of oxygen = 4 × (molar mass of O)
= 4 × 16.00
= 64.00 g
Step 3: Calculate the percent composition of oxygen.
Percent composition of oxygen = (mass of oxygen / total molar mass of H₂SO₄) × 100
= (64.00 / 98.09) × 100
≈ 65.25%
Therefore, the percent composition of oxygen in H₂SO₄ is approximately 65.25%.
Hope this helps!