The average molar mas | Chemistry

JEE MAINN 2020

06-09-2020 S2

Question

The average molar mass of chlorine is 35.5 g $\mathrm{mol}^{-1}$. The ratio of ${ }^{35} \mathrm{Cl}$ to ${ }^{37} \mathrm{Cl}$ in naturally occuring chlorine is close to

Select the correct option:

1 : 1

2 : 1

3 : 1

4 : 1

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\begin{aligned} & \text { Average molar mass }=\frac{35 \times 3+37 \times 1}{4}=35.5 \\ & \Rightarrow \quad{ }^{35} \mathrm{Cl}:{ }^{37} \mathrm{Cl}=3: 1\end{aligned}$

Question Tags

JEE Main

Chemistry

Easy

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