Question

A volatile liquid was allowed to evorate in a 43.298g flask that has a total volume of 252mL.the temperature of the water bath was 100 celsius at the atmospheric pressure of 776 torr.the mask of the flask and condensed vapor was 44.173g.calculate the molar mass of the liquid.
252mL x 43.298/44.173=247mL

is this right?

Answer 1

no, no, no.

calculat the mass of the liquid, the final mass minus the mass of the flask.

calcuate the moles of liquid.
n=PV/RT t is in Kelvins

molar mass=massliquid/number moles.

Answer 2

is the answer for this one 7.22

Answer 3

Molar mass of 7.2? Not likely. What elements could it consist of?

Answer 4

would you please tell me the calculation....please

Answer 5

Try following the instructions.
<b>From Bob Pursley.</b><i>
calculat the mass of the liquid, the final mass minus the mass of the flask.
</i>
<b>44.173-43.298 = ?? = mass liquid.</b><i>

calcuate the moles of liquid.
n=PV/RT t is in Kelvins
</i><b>
substitute into n = PV/RT</b><i>
molar mass=massliquid/number moles. </i>

<b>You have the mass liquid from the first part and the number of moles from the n = PV/RT. Just follow the process. If you still have problems, show your work to these calculations.</b>