chem study

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8 Terms

1
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mass in grams → moles

mass in grams / molar mass

2
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moles → mass in grams

moles * molar mass

3
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#of atoms → moles

atoms / 6.022 × 10²³

4
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mass → atoms

(mass in g/molar mass)(6.022 × 10²³)

5
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moles → atoms

(moles)(6.022 × 10²³)

6
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its a sigfig when…

zeros after nonzeros (ex 20.00, 4 sigfigs)

7
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how should we round w sigfigs?

by the fewest amt

8
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leading zeros are….

not sigfigs