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8 Cards in this Set
- Front
- Back
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What are chemicals usually measured by? |
Mass or volume |
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On what scale do reactions take place? |
The atomic scale |
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What quantity do chemists use to count the number of particles in a substance? What unit is this measured in? |
A quantity called amount of substance 'n' is measured in a unit called the mole 'mol' |
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What is the Avogadro constant ? |
6.02 x 10²³ mol¹ which is the number of particles in each mole of carbon-12 |
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How can you easily find the mass of one mole of atoms of any element? |
It's the relative atomic mass on grams. |
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What is it important to mention when working in moles? |
The formula or unambiguous name of a substance for clarity. |
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What does the molar mass give? |
It gives the mass in grams in each mole of the substance. |
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What is the equation that links amount of substance n, mass m, and molar mass M? |
m = n x M |
