2 Answers

Danilo Akamine · Answer 1 · 2016-12-29T15:26:31+0000

1.Molar mass of phos.=30.97g/mol

2.n=m/M
=2.3g/30.97g/mol
=0.07mol

3. therefore the amount of moles in 2.3g of phosphorus is 0.07mol

Rakesh Singh · Answer 2 · 2017-01-03T21:03:12+0000

The Molecular Mass for Phosphorus is 31 grames / mole.

So, 31g. P.....................1 mole
2.3g. P ..........................x mole

$x= (2,3)/(31) = \boxed {0,07} \hbox { moles }$

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