# chemistry h/w help

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The concentration of lead nitrate (Pb(NO3 )2 ) in a 0.726 M solution is __________ molal. The density of the solution is 1.202
g/mL.

• chemistry h/w help -

M = moles/L
0.726 means 0.726 moles/L.
mass = volume x density
mass = 1000 mL x 1.202 g/mL = 1202 grams.
Convert 0.726 moles to grams and subtract that from 1202 g to find grams solvent then convert to kg solvent.
Finally, m = moles/kg solvent.

• chemistry h/w help -

thanks i was able to solve it...

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