Question

How many H atoms are in 6.43g x 10^24 molecules of water

Answer 1

`12.86* 10^(24)` atoms of hydrogen

Step-by-step explanation:

The molecular formula for a water molecule is
`H_2O`.

From the above formula, we can conclude that 1 molecule of water contains 2 atoms of hydrogen and 1 atom of oxygen.

There are
`6.43* 10^(24)` molecules of water.

1 molecule of water = 2 atoms of hydrogen.

∴
`6.43* 10^(24)` molecules of water =
`2* 6.43* 10^(24)=12.86* 10^(24)` atoms of hydrogen.

Therefore, there are
`12.86* 10^(24)` atoms of hydrogen in
`6.43* 10^(24)` molecules of water.