We are asked to give the name of the fourth oxide fo vanadium.
Get Empirical formula.
100 % = % V + % O
%O = 100% - 56 %
%O = 44 %
Recall that mass percent is given by:
Assuming we have 100 g of the compound, this means we have 56 g C and 44 g O.
Now, we need to get the moles of each element in the compound.
The atomic masses are 50.94 g/mol C and 16 g/mol O.
= 1.10 mol V
= 2.75 mol O
Vanadium forms four different oxides in which the percent by mass of vanadium is respectively 76 % , 68 % , 61 % , and 56 % .
Give the name of the fourth oxide.
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