Write the formulae of the following compounds: Sodium hydroxide, sulfuric acid, ammonia, and sodium carbonate.

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Solution

Chemical formula: The chemical formula of a molecule employs symbols to denote the molecule of an element or of a compound.
The oxidation number rule of chemical formula is that sum of the charge should be neutral.
Steps are writing chemical formula:
Write the chemical element symbol and its valency.
Criss cross the valency numbers use it as subscripts.
Simply the ratio of the numbers if it is possible.
Answers:
The formula for sodium hydroxide is $NaOH .$
The formula for sulphuric acid is $H_{2} {SO}_{4}$ .
The formula for ammonia is ${NH}_{3}$ .
The formula for sodium carbonate is ${Na}_{2} {CO}_{3}$ .

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