Question

calculate the percentage composition of oxygen in magnesium nitrate crystals.

Answer 1

Answer:

Explanation:

Generally, in chemistry composition is meant by mass composition.

MgNO3 mass = 24+14+(16*3)=86

Mass of oxy. in it=48

Composition of oxy =48/86

.558

Answer 2

Answer:

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Molar mass of Mg(NO3)2.6H2O=256.4 g

So, % of oxygen =192×256.4100=75