Answer:
1.534x10²³
Step-by-step explanation:
One mole of any compound has N molecules.
Where N is the Avogadro's number
Molecular weight of H2SO4 is
H2 = 2
SO4 = 96
H2SO4 = 2+96
98g/mol
Hence the number of mole of H2SO4 in 25g = 25/98 = 0.2551mol
Number of molecules = 25/98 × 6.022×10^23
= 1.536×10^23 molecules