Answer:
= 3.01× [tex]10^{23}[/tex] molecules.
Explanation:
1 mole of [tex]H_{2}SO_{4}[/tex] - 98g
? moles of [tex]H_{2}SO_{4}[/tex] - 49g
= 49 ÷ 98 = 0.5 moles of O2 in 49g.
But 1 mole of any substance = 6.023 × [tex]10^{23}[/tex] molecules
∴ 0.5 moles = 0.5 × 6.023 × [tex]10^{23}[/tex] molecules
= 3.01× [tex]10^{23}[/tex] molecules.
