Question #05d9c

1 Answer
Michael · Ernest Z. · Stefan V.
Apr 14, 2015

There are 0.75 moles.

#A_r# of phosphorus = 30.97. This means that 1 mole of phosphorus atoms weighs 30.97g

So 1 mole of #P_4# molecules weighs #4xx30.97= 123.88"g"#

The number of moles #n# = mass/mass of 1 mole:

#n=m/M_r=92.91/123.88=0.75#

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