Question
What is the number of oxygen atoms present in 5 moles of sulphuric acid (H2SO4)?
Answer: Option A
:
A
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A
The molecular formula of sulphuric acid is H2SO4 .
One molecule of H2SO4 has 4 atoms of oxygen. So, one mole of sulphuric acid will have 4 moles of oxygen. Therefore, 5 moles of sulphuric acid will have
4× 5 = 20 moles of oxygen atoms.
One mole of any substance will have 6.022×1023 particles of that substance. Hence, the total number of oxygen atoms in 5 moles of H2SO4
=20×6.022×1023
=120.44×1023 atoms.
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