The empirical formula will become CuO.
The formula of a specific chemical compound in its most basic form is known as an empirical formula. It's a condensed whole number ratio of the atoms in a formula.
Mass of copper = 15.33g
Mass of oxygen= 19.20g-15.33g = 3.87g
Calculations:
Moles of copper= 15.33 /63.54
Moles of copper =0.24
Moles of oxygen= 3.87 / 16
Moles of oxygen = 0.24
The number of moles of copper and oxygen are same. Hence, the empirical formula will become CuO.
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