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9 Cards in this Set
- Front
- Back
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what is the number of a mole? |
6.023 x 10^23 |
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what is the definition of one mole? |
one mole of atoms of any substance will have a mass in grams equal to the relative formula mass of that substance. |
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carbon had an Ar/Mr of 12. what is the mass of one mole of carbon? |
one mole weighs 12 g. |
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what is the formula for the number of moles? |
number of moles = mass in g / Mr |
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how many moles are there in 66g of carbon dioxide? |
1.5 moles |
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what mass of carbon is there in 4 moles of carbon dioxide? |
48 g |
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work out the percentage composition of 42.9g K of potassium in 61.6g of potassim hydroxide KOH? |
(42.9/61.6) x 100 = 69.6% or (39/56) x 100 = 69..6% |
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What does empirical formula? |
Is the simplest ratio of atoms in a compound. |
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The empirical formula of ethane C2H6? |
CH3 |
