$5 \times 10^2 \, cm = .......... \, dm$

$0.1 \, mol \, L^{-1}$ means how much $mol \, m^{-3}$ and how much $mol \, cm^{-3}$?

Which of the following has the dimension of $[ML^{2} T^{-2}]$?

$1 \, kg \, m^{-3} = \dots \, g \, cm^{-3}$

Perform the following calculations for the given exponential numbers:
$(i)$ $(6.7 \times 10^4) \times (8.4 \times 10^7)$
$(ii)$ $\frac{(3.4 \times 10^{-3})}{(6.5 \times 10^{-7})}$

The prefix $10^{18}$ is