Question

isotopes of nitrogen is 14n7 and 15n7 in a ratio 272:1 fractional mass will be

Answer 1

Answer:

Natural nitrogen (7N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15. Fourteen radioisotopes are also known, with atomic masses ranging from 10 to 25,

Explanation:

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Answer 2

The correct question is

Isotopes of nitrogen are 14n7 and 15n7, percentage abundance in a ratio of 272:1 fractional mass will be?

The fractional mass of nitrogen is 14.

Given:

Isotopes of nitrogen are ¹⁴N₇ and ¹⁵N₇.

percentage abundance of ¹⁴N₇ and ¹⁵N₇ are in the ratio of 272:1.

To Find:

The average mass of nitrogen.

Solution:

• We are given the percentage abundance of isotopes of nitrogen.

• We are required to find a fractional mass or average mass of isotopes of nitrogen ¹⁴N₇ and ¹⁵N₇.

We know the formula for fractional mass,

Fractional mass =  Σxₙmₙ/ Σxₙ

where xₙ is the percentage abundance of a particular isotope

          mₙ is the mass number of a particular isotope

x₁ = 272, m₁ = 14 and x₂ = 1, m₂ = 15

Substituting the value of x and m in equation (1), we get

Fractional mass = 272*14 + 15*1/273

                        = 14.0036

                        ≈ 14

Hence, The fractional mass of nitrogen is 14.

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