Asample of a certain binary compound contains 6.93 g of silicon and 7.89 g of oxygen. what is the percent composition of the compound?

Given, mass of the silicon = 6.93 g

mass of the oxygen = 7.89 g

Calculate the number of moles of both atoms:

Insert the given values of mass in above formula:

=

=

=

=

Thus,

Total number of moles =  number of silicon+ number of mole of oxygen

= =

Put the values in above formula:

=

=

Thus, percent composition of silicon and oxygen is and