Question

How many molecules are in 49.0 g of H2SO4? Answer in units of molec.

Answer 1

= 3.01×
`10^(23)` molecules.

Step-by-step explanation:

1 mole of
`H_(2)SO_(4)` - 98g

? moles of
`H_(2)SO_(4)` - 49g

= 49 ÷ 98 = 0.5 moles of O2 in 49g.

But 1 mole of any substance = 6.023 ×
`10^(23)` molecules

∴ 0.5 moles = 0.5 × 6.023 ×
`10^(23)` molecules

= 3.01×
`10^(23)` molecules.