How many hydrogen atoms are in 51 amu of pure ammonia (NH₃)?

Name: How many hydrogen atoms are in 51 amu of pure ammonia (NH 3 )?
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Question

Quizplus · Accepted Answer

The molar mass of NH3 (ammonia) is approximately 17 g/mol. Therefore, 51 amu of pure ammonia is equivalent to 51/17 = 3 moles of NH3. Since each mole of NH3 contains 3 hydrogen atoms, 3 moles of NH3 contain 3 x 3 = 9 hydrogen atoms. Therefore, the correct answer is choice B) 9 H atoms.

How Many Hydrogen Atoms Are in 51 Amu of Pure