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Question

What is meant by a chemical formula? Write the formulae of one element and one compound.


Solution

An expression which states the number and type of atoms present in a molecule of a substance.

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

Examples: The element Carbon has the symbol C and Hydrogen has HThere are 6 C atoms and 14 H atoms in a hexane molecule, which has a molecular formula of C6H14.

 A formula for an element - C (carbon)

 A formula for compound, Water - H2O

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