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

Options

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

Explanation

Given that density of solution =`312g mL^(-1)`
Volume of solution = 15mL
For a solution Mass =volume xx density
`=1.5mL xx3.12 g mL^(-1)=4.68g`
The digit 1.5has only two significant figures, so the answer must also be limited to two significant figures, So, it is rounded off to reduc e the number of significant figures. Hence, the answer is reported as 4.7g .