If the density of a solution is `3.12 g mL^(-1)`, the mass of 1.5 mL solution in significant figures is .........

Options

A. 4.7 g
B. `4680xx10^(-3)` g
C. 4.680 g
D. 46.80 g

Answer

C, D

Explanation

Density of solution `= 3.12 g mL^(-1)` (given)
Volume of solution `= 1.5` mL
For a solution,
Mass `= "volume" xx "density`
`= 1.5 mL xx 3.12 g mL^(-1)= 4.68g`
The digit 1.5 has only two significant figures, figures, so the answer must also be limited to two significant figures. So, it is rounded off to reduce the number of significant figures. Hence, the answer is reported as 4.7 g.