A molecular compound containing only phosphorus and oxygen has the formula PxOy. A sample of the compound is found to contain 0.161 g of phosphorus and 0.290 g of oxygen. Determine the empirical formula of the compound. What is the subscript of oxygen in the formula (i. e. - 'the value of 'y')

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

wher is the rest of the question

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.