Question

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What is the mass of
(a) 0.2 mole of oxygen atoms?
b) 0.5 mole of water molecules?​

Answer 1

Answer:

Hope it will help you to solve the problem

Answer 2

Answer:

Step-by-step explanation:

Molar mass of oxygen=16u (M)

no. of moles=0.2 (N)

So,

mass=?

We know that

mass=N×M

=16×0.2

=3.2 g of oxygen

Similarly, for water

M=18u and N=0.5

so,

mass=18×0.5

=9g of water