If the density of a solution is $3.12 g m L^{- 1}$ , the mass of 1.5 mL solution in significant figures is .......

(a) 4.7 g (b) $4680 \times 10^{- 3} g$ (c) 4.680 g (d) 46.80 g

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Solution

(a)

Given that, density of solution $= 312 g m L^{- 1}$

Volume of solution = 1.5 mL

For a solution, Mass = Volume $\times$ density

$= 1.5 m L \times 3.12 g m L^{- 1} = 4.68 g$

The digit 1.5 has only two significant 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

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If the density of a solution is 3.12 g mL−1, the mass of 1.5 mL solution in significant figures is ....... (a) 4.7 g (b) 4680×10−3g (c) 4.680 g (d) 46.80 g

If the density of a solution is $3.12 g m L^{- 1}$ , the mass of 1.5 mL solution in significant figures is .......

(a) 4.7 g (b) $4680 \times 10^{- 3} g$ (c) 4.680 g (d) 46.80 g