Question

how many molecules of o2 are needed to obtain 16 molecules of h2o​

Answer 1

Answer:

8 molecules of o2 are required to make 16 molecules of h2o.

Explanation:

Oxygen

Each molecule of o2 contains 2 oxygen atoms. Therefore, 8 molecules of o2 have 8x2=16 atoms of oxygen. As each molecule of h2o requires only 1 atom of oxygen, therefore, 16 molecules of h2o require 16x1= 16 atoms of oxygen.

As already said, we require 2 atoms of oxygen to make 1 molecule of oxygen, the number of molecules formed in this case are 16/2= 8 molecules.

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