2.58 L solution containing 1.58 mol L-1 hydrochloric acid (HCl) has been left on your bench. How many moles of sodium hydroxide (NaOH) are needed to neutralise the acid?

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".