Problem: 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.

FREE Expert Solution

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:


% mass=mass of Xtotal mass×100


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.


56 g V×1 mol V50.94 g V =  1.10 mol V


44 g O×1 mol O16.00 g O =  2.75 mol O



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Problem Details

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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