Question

Find the moles no of moles at the following 12gof oxygen

Answer 1

Molar mass of O2 = 2 x 16 = 32 g

:-Number of moles in 12g O2 
= Given mass/Molar mass
= 12/32 =
0.375 mole.

Answer 2

Solution :

we need to find out number of moles in 12g of oxygen.

• Given mass = 12g

Now, we will calculate molar mass of Oxygen.

$\rm \: O_2 : - \\ = \rm \: 2 \times 16 \\ = \rm \: 32 \: g\:\:$

Number of moles in 12 g of oxygen :-

= Given mass/Molar mass

= 12/32

= 6/16

= 3/8

= 0.375 moles

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