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3 years ago

The number of moles in 2.93 g of Li2O in corrext sig figs

Chemistry

2 answers:

Bumek [7]3 years ago

7 0

Answer:

Mass of Li2O = 2.93g

Molecular mass of Li2O = 29.88g/mol

No of mole of Li2O = Mass/Molar mass

No of mole of Li2O = 2.93/29.88

No of mole of Li2O = 0.0981mol

jekas [21]3 years ago

4 0

Answer:

0.1 mol

Explanation:

Number of mole= mass/molar mass

lithium have a mass number of 7 and oxygen have a mass number of 16.

so, (7x2) + 16

= 30

therefore, number of moles = 2.93/30

= 0.10

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A solution of phosphoric acid was made by dissolving 10.0 g of H3PO4 in 100.0 mL of water. The resulting volume was 113 mL. Calc

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Molarity of the solution :

$=\frac{0.1020 mol}{0.113 L}=0.903 M$

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The number of moles in 2.93 g of Li2O in corrext sig figs​

The number of moles in 2.93 g of Li2O in corrext sig figs