Question

How many molecules are in 41.8 g H2O?

Answer 1

7.63 × 10²³ molecules

Step-by-step explanation:

First, convert grams to moles using the molar mass of water (32.988 g/mol).

41.8 g ÷ 32.988 g/mol = 1.267 mol

Next, convert moles to molecules using Avogadro's number (6.022 × 10²³).

1.267 mol × 6.022 × 10²³ molecules/mol = 7.63 × 10²³ molecules