Question #7a9ae

1 Answer
Apr 22, 2017

Answer:

We need to determine molar equivalence.......

Explanation:

Magnesium oxidizes according to the following stoichiometric equation:

#Mg(s) +1/2O_2(g)rarrMgO(s)#

#"Moles of metal"=(10*g)/(24.3*g*mol^-1)=0.412*mol#.

And thus we need half an equivalent of dioxygen gas.........i.e.

#1/2xx0.412*molxx32.0*g*mol^-1=6.58*g# #O_2# gas........

What is the mass of the oxide collected?