Question

How many
(a) molecules
(b) hydrogen atoms
(c) oxygen atoms
are there in 0.5 mol of
water?​

Answer 1

0.5 mol of water = 3.011 × 10^23 molecules.

0.5 mol of water = 6.022 × 10^23 hydrogen atoms

0.5 mol of water = 3.011 × 10^23 oxygen atoms

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Answer 2

molecules of water=3.011×10²³

hydrogen atom=6.023×10²³

oxygen atom = 3.011×10²³

Explanation:

1mol water contain 6.023×10²³ molecules of water

then 0.5 mol water contain 0.5×6.023×10²³ molecules of water

i.e. 3.011×10²³ molecules of water

1 molecule of water contain 2 atoms of hydrogen and 1 atom of oxygen

Then no. of oxygen atom=3.011×10²³

no. of hydrogen atom=6.023×10²³