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mass in grams → moles
mass in grams / molar mass
moles → mass in grams
moles * molar mass
#of atoms → moles
atoms / 6.022 × 10²³
mass → atoms
(mass in g/molar mass)(6.022 × 10²³)
moles → atoms
(moles)(6.022 × 10²³)
its a sigfig when…
zeros after nonzeros (ex 20.00, 4 sigfigs)
how should we round w sigfigs?
by the fewest amt
leading zeros are….
not sigfigs
