Question

find the number of oxygen atoms in 98 gram of sulphuric acid??

Answer 1

The number of oxygen atoms in 98 grams of sulphuric acid is 3728534.

Answer 2

Concept:

• Mole concept
• Calculating molar mass
• Avagadro's number

Given:

• The compound is sulphuric acid,  H2SO4
• The amount of sulphuric acid w = 98 g

Find:

• The number of oxygen atoms in 98 g of H2SO4

Solution:

The molar mass of sulphuric acid is m = 2(1) + 32 + 16 (4) = 98 g/mol

The number of moles of H2SO4 = w/m = 98/98 = 1 mol

1 mole of H2SO4 contains 4 moles of oxygen

So 98g of H2SO4 contains 4 moles of oxygen

1 mole of atoms contains 6.022*10^23 atoms

4 moles of atoms contain 4*6.022*10^23 = 24 *10^23  atoms

The number of oxygen atoms is 24 *10^23.

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