Question

find the number of Oxygen atoms present in 49g of H2SO4

Answer 1

Number of moles of H₂SO₄ = given mass/molar mass = 49/98 = 0.5

1 molecule of H₂SO₄ contains 4 atoms of Oxygen.

Also,

1 mole of H₂SO₄ contains Avogadro number of molecules

0.5 moles of H₂SO₄ contains 0.5 x Avogadro number of molecules.

so, 0.5 moles of H₂SO₄ contains 4 x 0.5 x Avogadro number of O atoms

→ 0.5 x 4 x 6 .022 x 10²³

→ 12 .044 x 10²³

→ 1.2 x 10²⁴ number of Oxygen atoms

Hope it helps!!

Answer 2

Answer:

1.2044 * 10^24 atoms

Explanation:

49 gram of sulfuric acid is 0.5 mole.

Since, no. if moles = given mass / molar mass

No. of oxygen atoms in one mole of sulfuric acid = 4 * 6.022 * 10^23

Thus, total no. of oxygen atoms = 0.5 * 4 * 6.022 * 10^23 = 1.2044 * 10^24