Question

How many grams are in 2.50 moles of `"H"_2"O"` ?

Answer 1

`"45.0 g"`

Explanation:

Molar mass of `"H"_2"O"` is `"18.0 g/mol"`. Mass of `2.50` moles of `"H"_2"O"` is

`2.50 cancel"moles" × 18.0 "g"/cancel"mol" = "45.0 g"`