Find no. of moles in
(i) 392 g of sulphuric acid
(ii) 44.8 lt of CO2 at STP
(iii)6.022x1023 molecules of O2

Dear student.
1) Given mass of H2SO4 = 392 g.
Molar mass of H2SO4 = 98 g/mol .
n = 392/98 = 4 moles

ii) Number of moles of 22.4 L of CO2 at STP = 1 Mole .
Number of moles of 44.8 L = 44.8 / 22.4 = 2 moles.

iii)1 mole contains Avagadro number [6.023 x 1023] of molecules.
Thus 6.023 x 1023 molecules of oxygen indicates 1 mole.

. Regards

  • -1
What are you looking for?