Question

Which compound contains the highest percent by mass of hydrogen? Select one:
a. HCl
b. H2O
c. HF
d. H3PO4​

Answer 1

Answer:

h20

Explanation:

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Answer 2

Answer:

Correct option is

B

H

2

O

The compound containing the highest percent by mass of hydrogen is water H

2

O.

For water, the percent by mass of hydrogen is

18

2×100

=11.11%.

For HCl, the percent by mass of hydrogen is

36.5

1×100

=2.74%.

For phosphoric acid, the percent by mass of hydrogen is

98

3×100

=3.06%.

For sulphuric acid, the percent by mass of hydrogen is

98

2×100

=2.04%.

For HF, the percent by mass of hydrogen is

20

1×100

=5%.