Chem: The mole and Avogadros constant

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IGCSE

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9 Terms

1
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Define mole

the untit of amount of substance, it contains 6.02×10²³ particles

2
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State avogadros constant

6.02×10²³

3
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Formula for moles in a solid

Moles= mass / Molar mass

4
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Forumla for moles in a liquid

Mole= cincentration

5
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Formula for moles in a gas

moles = Gas volume in DM³ / 24

6
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State the formula for finding concentration from mass and volume

Concentration = mass / volume

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Percentage yield formula

Percentage yield= Actual yield / predicted yield * 100

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Percentage purity formula

Percentage purity = mass of pure product / mass of impure product * 100

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Formula for percentage composition by mass

Percentage composition by mass= Mass of component (g) . Total mass (g) * 100