Multiple choice

What is the correct number of hydrogen atoms in 0.25 moles of water?

  1. 2

  2. 12.05 x 1023

  3. 0.18 x 1023

  4. 3.01 x 1023

  5. 0.75 x 1023

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

1 mole of H2O atoms contains 2 moles of H atoms. = 2 X 6.023 X 1023 hydrogen atoms So, 0.25 moles of H2O contains 2 x 6.023 X 1023 X 0.25 H atoms. = 3.01 X 1023 H atoms. Thus, this is the correct answer.

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