A59.4-mg sample of the compound x4o6 contains 14.4 mg of oxygen atoms. what is the atomic mass of element x?

Explanation:

Hello,

One can solve this problem by using percent compositions, therefore, the first step is to compute 's percent as shown below:

Now, we define the formula for the percent composition of in as follows:

Whereas is the molar mass of the given compound and the atomic mass of , thus, we obtain:

Solving for the atomic mass:

The element having such atomic mass is arsenic (74.9g/mol).

Best regards.

it's c. elements are placed in rows based on how may valencies electrons have.