Question

how many moles of H2SO4 are present in 20cm^3 of 2.0mol.dm^-3 of H2SO4​

Answer 1

Answer: Molar mass of H2SO4 = 98.07848 g/mol

Molecular weight calculation:

1.00794*2 + 32.065 + 15.9994*4

Percent composition by element

Element   Symbol   Atomic Mass   # of Atoms   Mass Percent

Hydrogen H 1.00794 2 2.055%

Oxygen O 15.9994 4 65.251%

Sulfur S 32.065 1 32.693%

I believe this is the right answer if im not wrong. hope this helps :D