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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

A sample of the compound magnesium oxide is synthesized as follows. 60. g of magnesium is burned and produces 100. g of magnesium oxide, indicating that the magnesium combined with 40. g of oxygen in the air. If 30. g of magnesium had been used, what mass of oxygen would have combined with it? What law of chemistry is used in solving this problem?

Interpretation Introduction

Interpretation:

The amount of oxygen gas required in the combustion reaction and the law of chemistry used to calculate the amount of oxygen gas has to be given.

Concept introduction:

Law of definite proportion:

A given compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

Explanation

The amount of oxygen used is calculated as,

  AmountofO2used:60g of Mg required 40g of O2 gas,Thus,30g of Mg requires (y)g of O2 gas,

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