Question

Calculate the number of molecules in 54 gm of H 2 O?

Answer 1

1.81 × 10 power 24 ...............

Answer 2

Explanation:

•   There are 6.022×1023 molecules in a mole.
•    From there, you can go from moles to molecules using 6.022×1023 molecules in a mole.
•    You are left with 1.8×1024 water molecules (rounded to two sig figs).