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Transcript 
1.
A compound is made from 72 g of carbon and 12 g of
hydrogen. Work out its empirical formula.
2.
A common salt is analysed and is found to have 52.9 g of
sodium and 81.7 g of chlorine. What is its empirical formula?
3.
Aluminium ore may consist of 156 g of aluminium and 278 g
of oxygen. Is its empirical formula AlO2 or AlO3?
4.
A commercial paint thinner has the following composition:
carbon 25.2 g; hydrogen 8.5 g; oxygen 33.7 g. What is its
empirical formula?
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