Question

... by
Choose the most correct option.
A. A sample of pure water, whatever the
source always contains .......
mass of oxygen and 11.1 % by mass of
hydrogen.
a. 88.8 b. 18 c. 80 d. 16​

Answer 1

A sample of pure water, whatever the  source always contains 88.8   mass of oxygen and 11.1 % by mass of  hydrogen.

Explanation:

Given that,

A sample of pure water

As we know,

The composition of pure water contains:

$H_{2} O$ = 2g H + 16g O

Therefore,

The percentage of oxygen mass in the sample of pure water = Mass of oxygen/Total mass * 100

= 16g/18g * 100

= 88.8

Thus, option A is the correct answer.

Learn more: Mass of compound

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