Question

If the density of a solution is $3.12gm/m{l}^{-1}$, the mass of $1.5ml$ solution in significant figures is:

• A. $4.7g$
• B. $4680\times {10}^{-3}g$
• C. $4.680g$
• D. $46.80g$

Answer 1

Answer: (A)

$4.7g$

Density of solution, $\rho =3.12g/mL$

Mass of 1 mL solution $=3.12g$

Mass of 1.5 mL solution =$1.5\times 3.12=4.68g$

The answer should have 2 significant figure i.e. $4.7g$.

Hence, option $A$ is correct