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  • (ii) Find (a) the total number of neutrons in 7 mg of 14 C. (Assume that mass of a neutron = 1.675 x 10^-27 kg).

2.2    (ii) Find (a) the total number of neutrons in 7 mg of 14C. (Assume that mass of a neutron = 1.675 \times 10^{-27}\ kg).

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As 1 atom of 14C contains = 14-6= 8\ neutrons.

and the number of atoms in 14C in 1 mole is 6.022\times10^{23} atoms.

Therefore, the number of neutrons in 14g of 14C in 1 mole =8\times 6.022\times10^{23}\ neutrons.

The number of neutrons in 7mg:

= \left ( \frac{8\times6.022\times10^{23}\times7}{14000}\right )

= 2.4088\times10^{21}\ neutrons.

Posted by

Divya Prakash Singh

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