Question -
What is the number of oxygen atoms present in 5 moles of sulphuric acid (H2SO4)?
Options:
A .  120.44×1023
B .  90.33×1023
C .  60.22×1023
D .  75.55×1023
Answer: Option A : A The molecular formula of sulphuric acid isH2SO4 . Onemolecule ofH2SO4has 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 = 20moles of oxygen atoms. One mole of any substance will have6.022×1023particles of that substance. Hence, thetotal numberof oxygen atoms in 5 moles ofH2SO4 =20×6.022×1023 =120.44×1023 atoms.
Submit Your Solution hear: