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3241004551 [841]
4 years ago
14

How to find number of valence electrons using electron configuration?

Chemistry
1 answer:
choli [55]4 years ago
7 0
<span>You find the valence electrons in an atom's electronic arrangement by consulting the periodic table.Hope this was helpful.

</span>
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If excess sulfuric acid reacts with 30 grams of sodium chloride, how many grams of HCl are produced
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Consider the Chemical Reaction first:

Reaction: H₂SO₄ + 2 NaCl → 2 HCl + Na₂SO₄

Now, Given mass of NaCl = 30 g
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Now, Number of moles of NaCl = 30/58 = 0.517 mol

Balance the equation, For every 2 molecules of NaCl, 2 molecules of HCl formed, so the number of moles would be same.

Hence, Number of moles of HCl = 0.517 mol

Now, Mass of HCl = Molar mass of HCl * Number of moles
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