Question

How do you calculate the percent by mass sulfur in sulfuric acid?

Answer 1

Sulfuric acid = H2SO4

Atomic weight...

H=1 gram/mole

S=32 gram/mole

O=16 gram/mole

Molecular weight of H2SO4

=2(H)+1(S)+4(O)

=2(1)+1(32)+4(16)

=2+32+64

=98 grams/mole

%Sulfur × Molecular weight = mass of sulfur × 100

%S = 3200÷98

%S = 32.65%