Question 169521
</pre><font size=4><b>
It follows Ideal Gas Law: ---> {{{PV=nRT}}}
where--->{{{system(P=1.4atm,V=250ml=0.250L,n=moles,R=GasConstant=0.0821,T=75+273.15(K),mass=1.03(g))}}}
Subst.:
{{{(1.4)(0.250)=n(0.0821)(75+273.15)}}}
{{{0.35=n(28.583115)}}} --->{{{cross(0.35)0.0122449/cross(28.583115)=n*cross(28.583115)/cross(28.583115)}}}
{{{n=0.0122449(moles)}}}
.
We know that ---->{{{n=mass/MolecularWeight}}}
Then, {{{MW=mass/n=1.03(grams)/0.0122449(moles)}}}
{{{highlight(MW=84.12(grams/mole))}}},of Cyclohexane (Answer)
.
Thank you
Jojo</pre>