Question

The interatomic distances in h2 and cl2 molecules are 74&198 pm respectively.the bond length of hcl is

Answer 1

rH2= 74pm/2=37pm

rcl2=198/2=99 pm

∴bond length of HCl=rH2+rCl2=37+99=136 pm

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Answer 2

Answer: The bond length of HCl is 136 pm.

Explanation:

We are given:

Bond length of hydrogen molecule = 74 pm

Bond length of chlorine molecule = 198 pm

To calculate the bond length of HCl, we use the formula:

$l_{HCl}=\frac{l_{H_2}}{2}+\frac{l_{Cl_2}}{2}$

Putting values in above equation, we get:

$l_{HCl}=\frac{74}{2}+\frac{198}{2}\\\\l_{HCl}=136pm$

Hence, the bond length of HCl is 136 pm.