Students are confuse about proper answer to these questions. Do you have an answer?
When water boilers are used for a long period of time, the solid substances left behind as scale are
A| Magnesium trioxosilicate (IV) and calcium Tetraoxosulphate(VI)
B| Magnesium trioxosilicate(IV) and rust
C| Clay and magnesium trioxosilicate (IV)
D| clay and rust
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