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vredina [299]
3 years ago
15

Without calculation what is the approximate atomic mass of neon

Chemistry
1 answer:
Aleksandr [31]3 years ago
8 0

20 u

You can’t do this without some calculation.

The easiest way is to argue that most atoms of neon have <em>10 protons</em> and 1<em>0 neutrons</em>.

Each proton and neutron has a mass of about 1 u, so the approximate atomic mass of neon is 20 u.


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Explanation:

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<u><em>Using cross multiplication:</em></u>

1.0 mol of hydrogen occupies → 22.4 L.

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∴ The no. of moles of hydrogen that occupies 1.47 L = (1.0 mol)(1.47 L)/(22.4 L) = 6.563 x 10⁻² mol.

  • Now, we can get the no. of grams of hydrogen in 6.563 x 10⁻² mol:

<em>The no. of grams of hydrogen = no. of hydrogen moles x molar mass of hydrogen</em> = (6.563 x 10⁻² mol)(2.0 g/mol) = <em>0.1313 g.</em>

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