Question

Calculate the mass of 0.1 mole of H2SO4

Answer 1

Mass of 1 mole H2SO4=
$((2 \times 1) + 32 +( 4 \times 16) = 98$gm
Hence mass of 0.1 mole of H2SO4=
$98 \div 10 = 9.8$ gm

Answer 2

Concept:

6.022 x 10²³ of any chemical unit, including atoms, molecules, ions, and others, is referred to as a mole. Due to a large number of atoms, molecules, or other components that make up any material, the mole is a useful measure to utilize .

Given:

0.1 mole of H₂SO₄.

Find:

Calculate the mass of 0.1 moles of H₂SO₄.

Solution:

The molar mass of H₂SO₄ = 98 g/mol.

1 mole of H₂SO₄ = Avogadro's number = 6.022 * 10²³ molecules

Thus, 1 mole of H₂SO₄ contains 6.022 * 10²³ molecules.

The number of moles is given by the following formula:

number of moles (n) = mass (m) / molar mass (M)

0.1 mole = m / 98 g/mol

0.1 mole * 98 g/mol = m

9.8 g = m

Therefore, the mass of 0.1 moles is 9.8 g.

Hence, the mass of 0.1 moles of H₂SO₄ is 9.8 g.

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