Question

3. What is meant by the term chemical formula? 4. How many atoms are present in a (i) HS molecule and (ii) PO 3- ion? 4​

Answer 1

Answer:

• A chemical formula is a symbolic representation of a chemical compound . It tells us about the type and number of atoms present in the compound
• In an H2S molecule three atoms are present; two of hydrogen and one of sulphur.
• PO43- ion has 1 atom of phosphorus and 4 atoms of oxygen hence 5 atoms in totality.

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