State the $SI$ unit of thermodynamic temperature and provide an explanation for this unit.

In the equation of state of an ideal gas $PV = nRT$,the value of the universal gas constant $R$ depends only on:

At what temperature will the values of $^\circ C$ and $^\circ F$ be equal?

$A$ student performs a titration with different burettes and finds titre values of $25.2 \ mL$,$25.25 \ mL$ and $25.0 \ mL$. The number of significant figures in the average titre value is

One fermi is $....$ (in $cm$).

Convert the following into basic $SI$ units:
$(i)$ $28.7 \, pm$
$(ii)$ $15.15 \, pm$
$(iii)$ $25365 \, mg$