Question

How many molecules of sucrose, C12H22O11, are there in 454 grams of sucrose?

Answer 1

Moles of sucrose=454⋅g342.30⋅g⋅mol−1=1.33⋅mol . Now it is a fact that in a mole of stuff there are 6.022×1023 individual items of stuff......... So 1.33⋅mol×6.022×1023⋅mol−1≅8×1023 individual sucrose molecules.