# 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:

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

###### 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.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Empirical Formula concept. You can view video lessons to learn Empirical Formula. Or if you need more Empirical Formula practice, you can also practice Empirical Formula practice problems.