$A$ sample was weighed using two different balances. The results were $(I)$ $3.929 \ g$ and $(II)$ $4.0 \ g$. How would the weight of the sample be reported in $g$?

How many significant figures are present in the following?
$(i)$ $0.0025$
$(ii)$ $208$
$(iii)$ $5005$
$(iv)$ $126.000$
$(v)$ $500.0$
$(vi)$ $2.0034$

The highest temperature among the following is

What would be the $SI$ unit for the quantity $\frac{p V^{2} T^{2}}{n}$?

The number of significant figures in $6.02 \times 10^{23}$ is

The dimensions of an aluminum block are $3.0 \, \text{inch} \times 4.0 \, \text{inch} \times 5.0 \, \text{inch}$. What is the mass of this block in grams? The density of aluminum is $2.7 \, \text{g/cm}^3$ and $1 \, \text{inch} = 2.54 \, \text{cm}$.