Question

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In water the hydrogen to oxygen mass ratio is
a)1 : 8
b)1 : 16
c)1 : 32
d)1: 34

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Answer 1

Answer:

Question: In water, the hydrogen to oxygen mass ratio is what!?

Mentioned options:

• (a) 1:8
• (b) 1:16
• (c) 1:32
• (d) 1:34

Solution:

In water, the hydrogen to oxygen mass ratio is 1:8 (1 is to 8).

• Henceforth, option (a) is correct!

Explanation:

→ We know that the atomic mass of hydrogen is one that is 1.

→ We also know that the atomic mass of oxygen is sixteen that is 16.

→ We know that the chemical formula for water is ${\sf{H_2O}}$

• Where, there are 2 atoms of hydrogen and 1 atom of oxygen.

Therefore,

The atomic mass of hydrogen in water molecule will be 1u × 2 = 2u and the mass of oxygen will be 16u × 1 = 16u.

→ Now as we know that we are finding ratio therefore,

$:\implies \sf Water \: \longrightarrow Hydrogen \: = Oxygen \\ \\ :\implies \sf Water \: \longrightarrow 2u \: = 16u \\ \\ :\implies \sf Water \: \longrightarrow \dfrac{2u}{16u} \\ \\ :\implies \sf Water \: \longrightarrow \dfrac{1u}{8u} \\ \\ :\implies \sf Water \: \longrightarrow 1:8$

• Henceforth, in water, the hydrogen to oxygen mass ratio is 1:8