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Science CBSE Homework Assignments
Class 9
Atoms and molecules
Mole concept
2.
Mole concept
Task:
2
m.
1.
How many moles of magnesium phosphate,\( Mg_3(PO_4)_2\) will contain 0.25 mole of oxygen atoms?
\(3.125\) x \(10^-{^2}\)
\(2.5\) x \(10^-{^2}\)
\(0.2\) x \(10^-{^2}\)
\(1.25\) x \(10^-{^2}\)
2.
The number of g-atom of oxygen in \(6.02\) × \(10^2{^4}\) CO molecules is
0.5
5
1
10
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