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If the value of Avogadro numberis 6.023x...

If the value of Avogadro numberis `6.023xx10^(23)mol^(-1)` and the vaueof Boltzmann constant is `1.380xx10^(-23)JK^(-1)`, then the number of significant digits in the calculated value of the universal gas constant is

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The correct Answer is:
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.
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