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Olegator [25]
3 years ago
11

PLEASE HELP

Chemistry
1 answer:
DENIUS [597]3 years ago
3 0

I believe that it is B

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Formulae for calculating number of moles​
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You would use this number, 6.02×1023 (Avogadro's number) to convert from particles, atoms, or molecules to moles. Whenever you go to the mole, divide by Avogadro's number. When you go to the unit from moles, multiply by Avogadro's number.
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Enlist any four examples of chemical change ?
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Suppose you have a mixture of solid mg(oh)2 and baso4, how do you separate the mixture
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This separation technique is a 4-step procedure. First, add H₂SO₄ to the solution. Because of common ion effect, BaSO₄ will not react, only Mg(OH)₂.

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MgSO₄ + 2 NaOH = Mg(OH)₂ + Na₂SO₄

Na₂SO₄ is soluble in water, while Mg(OH)₂ is not. Filter this solution again. The Mg(OH)₂ is retrieved in solid form on the filter paper.
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