Question

68g H2SO4= how much mol​

Answer 1

moles=Given mass number÷Atomic weight.

moles=68÷2×H+S+4×O

= 68÷2+32+64

= 68÷98

= 0.693 is the answer

Answer 2

Answer:

Mass of H=1×2=2u

Mass of S=32u

Mass of O=16×4=64u

.•. Molar mass of H2SO4= 2+32+64= 98u

No. of moles

$\frac{68}{98} = \frac{34}{49} = 0.693 \: moles$