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How many atoms are there in one mole of hydrogen gas? [Avogadro's constant = 6.02...

Chemistry
WAEC 2007

How many atoms are there in one mole of hydrogen gas? [Avogadro's constant = 6.02 x 1023mol-1]

  • A. 1.2 x 10 23
  • B. 6.0 x 10 23
  • C. 1.2 x10 24
  • D. 6.0 x 10 24
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Correct Answer: Option C
Explanation

One mole of hydrogen gas has 6.02 x 1023 molecules, and one molecule of hydrogen gas contains 2 atoms of hydrogen

therefore, one mole of hydrogen gas will contain 2 x 6.02 x10^23 atoms 

= 1.2 x 10^24 hydrogen atoms

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