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Kruka [31]
3 years ago
13

12g of magnesium ribbon was heated in a crucible. At the end of the reaction 20g of magnesium oxide had been produced. What mass

of oxygen had reacted with the magnesium?
Chemistry
1 answer:
sasho [114]3 years ago
6 0

Answer: 16 g of O_{2} reacted with the magnesium

Explanation:

from the equation of reaction: 2Mg + O_{2}→2MgO

48g of Mg requires 32g of O2 to yield 80g of MgO

That is :

    48 : 32 : 80

Hence 12 : x: 32

xg of O2  =\frac{12(32)}{48}

= 16 g of O_{2}

Therefore:

16 g of O_{2} reacted with the magnesium

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