moles unit all lessons

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12 Terms

1
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definition of a mole

the amount of substance that contains as much particles as there are in exactly 12 grams of carbon 12

2
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molar mass

the mass of one mole of a pure substance in g/mol

3
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particles for monoatomic

atoms

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particle for covalent bonds

molecule

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particle for ionic bond

formula units

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law of definite proportions

a compound always has elements in the same amounts by mass regardless of sample size

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empirical formula definition

the lowest whole number ratio of atoms/ions in a compound

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molecular formula

formula that gives exact number of atoms of each element in a compound

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molecular formula template

compound molar mass
———————————
empirical formula

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how do hydrates occur

When an ionic compound crystallizes from water solution and traps some water molecules inside its structure, it’s called a hydrate.

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what does a raised dot indicate

a weak bond with water molecules

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anhydrous

compounds with no water incorporated into them