3. A compound was found to contain 30% nitrogen
and 70% oxygen by mass.
1. A compound containing only copper and chlorine
is decomposed, and the masses measured to find
the mass composition:
Mass of copper present = 12.84g
Mass of chlorine present = 7.16g
i) Find the empirical formula.
il) Name the compound.
1) Find the empirical formula.
are
il) It is later found that its molecular formula is a 2
times multiple of the empirical. Write the molecular
formula.
iii) Name the compound.

2. 1) Find the empirical formula of a compound
containing carbon and hydrogen; a sample was
found to contain 1.5g of carbon and 0.5g of
hydrogen.
li) Name the compound, given that its empirical and
molecular formulas are the same.

Someone please help me I don’t get this question, it’s really hard especially the empirical formula bit