Question

No of neutrons in 5g of d2o

Answer 1

Answer:

The number of neutrons in 5 g of D_2O is 1.5055\times 10^{24} neutrons.

Explanation:

Mass of  = 5 g

Molar mass of  = 20 g/mole

First we have to calculate the moles of .

1 mole of  has  molecule of

0.25 moles of  has  molecule of

Now we have to calculate the number of neutrons in .

The number of neutrons present in 1 molecule of  is,

Number of neutrons = Atomic mass - Atomic number = 20 - 10 = 10 neutrons

Number of neutrons present in 1 molecule of  = 10 neutrons

Number of neutrons present in  molecule of  =  neutrons

Therefore, the number of neutrons in 9 mg of  is  neutrons.

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