Write the formula of the following compounds: I Chalk II Sulphuric acid
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Explanation:
Lead (Pb) is not a compound. It is an element present in its pure form so it a single homogeneous identity. Compounds have two or more elements present in the uniform composition in the compound state.
Sulphur dioxide (SO
2
) is formed by two elements namely, sulphur and oxygen.
Sulphuric acid (H
2
SO
4
) is a compound formed by hydrogen, sulphur and oxygen.
The chemical formula for chalk is CaCO3 which is made up of carbon, calcium and oxygen.
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