There are atoms of hydrogen in 300 molecules of ch3co2h.

600 atoms

Explanation:

Molecules are formed when two atoms of the SAME or DIFFERENT combine together.

Atoms are the smallest unit of matter that combines to form a compound.

Given number of molecules = 300 molecules

In 1 mole of the given chemical compound, there are 2 atoms of carbon, 4 atoms of hydrogen and 2 atoms of oxygen

Number of atoms of oxygen = 2× Number of molecules of compound.

i.e

Number of atoms of oxygen = 2× 300

600 is the answer.

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(i just googled and found the answer, so sorry if this isn’t what you’re looking for.)