Question

If the value of Avogadro number is ` 6.023 xx 10^(23) mol^(-1)` and the value of Boltzmann constant is `1.380 xx 10^(-23)J K^(-1)`, then the number of significant digits in the calculated value of the universal gas constant is

Answer 1

Correct Answer - 4
`K= (R)/(N_(A)):. R = k.N_(A)`
`=6.023 xx 10^(23)xx1.380 xx10^(-23)J.mol^(-1) .k^(-1)`
There are 4 significant figures in each term.
Hence, these be 4 significant figure in R.