Question

The molecular mass of h2so4 is 98amu
,calculate the number of moles of each element in 294 g of h2so4

Answer 1

total number of moles of H2SO4 in 294 g is 3 moles
number of moles of hydrogen is 3×2 =6 moles
number of moles of sulphur is 3 moles
and number of moles of oxygen is 3×4=12 moles

Answer 2

Answer:

Moles of H,S,O are 6,3 and 12 respectively

Explanation

Number of moles of H2SO4=294/98

=3

From the formula H2SO4,we know that 1 molecule of H2SO4 contains 2 atoms of H,1 atom of S and 4 atoms of O.

Thus,1 mole of H2SO4 will contain 2 mole of H,1 mole of S and 4 mole of O atoms.

Therefore,in 3 mole of H2SO4

No. of moles of H=2×3=6

No. of moles of S=1×3=3

No. of moles of O=4×3=12