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iren2701 [21]
3 years ago
7

What are lone pairs of electrons?

Chemistry
1 answer:
ozzi3 years ago
5 0
A lone pair is a pair of valence electrons that are not shared with another atom and is sometimes called a non-bonding pair.
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3 years ago
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How many grams of sodium are in 0.820 moles of na2so4?
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<span>the molar mass of a compound is the sum of the products of the atomic masses by the number of atoms of the element.
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1 mol of </span>Na₂SO₄<span> has a mass of 142 g.
In 1 mol of </span>Na₂SO₄<span> the mass of Na is 23 g/mol x 2 = 46 g.
                             
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mass of Na in 0.820 mol of Na₂SO₄ - 46 g /1 mol x 0.820 mol = 37.72 g.
mass of Na is 37.72 g
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3 years ago
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