Multiple choice

What is the mass of one molecule of water?

  1. 0.33 X 10-23

  2. 2.66 X 10 -23

  3. 6.02 X 1023

  4. 1.99 X 10 -23

  5. 2.99 X 10 -23

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

 Molecular mass of water = 2 + 16 = 18 g 1 mole of water (6.023 X 1023 molecules) weighs 18 g. Weight of 1 molecule of water = 18 / 6.023 X 1023 = 2.99 X 10 -23

Thus, this is correct.