Chemistry
Grade-9
Easy
Question
What is the percentage composition of magnesium in MgO?
0.5
0.2
1.5
0.6
0.5
0.2
1.5
0.6
Hint:
One MgO has one Mg atom.
The correct answer is: 0.6
Mass of MgO is 40g, atomic mass of Mg is 24g and that of oxygen is 16g.
One MgO has one Mg atom.
The percentage of magnesium in MgO = (24
40)
100% = 60%
The percentage composition of magnesium in MgO is 0.6
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