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What will be the ratio of magnesium atoms to oxygen atoms in four formula units of magnesium oxide?

Answer and explanation

Correct answer: One to one

The formula of magnesium oxide is MgO, so each formula unit contains one magnesium atom and one oxygen atom. Four formula units therefore contain four magnesium atoms and four oxygen atoms. The ratio is 4:4, which simplifies to 1:1. The number of formula units changes the totals but not the simplest ratio. Hence option A is correct; the other ratios do not follow from MgO.

Related tags

ScienceClass10Chemical FormulaMagnesium OxideAtomic RatioChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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