Question

what is the number of molecules in 9.0 g of water
​

Answer 1

Explanation:

18 gm of water-----1 mole of water

18 gm of water-----6×10²³ molecules

1 gm of water-------6/18×10²³ molecules

9 gm of water-------6/18(9)×10²³ molecules

9 gm of water-------6/2×10²³ molecules

9 gm of water-------3×10²³ molecules