MCQ
If the density of a solution is $3.12\ gm/ml$, the mass of $1 5\ ml$ solution in significant figures is ............ $\mathrm{gm}$
- ✓$4.7$
- B$4680 \times {10^{ - 3}}$
- C$4.680$
- D$46.80$
✓
Answer
Correct option: A.
$4.7$
a
Density of solution $=3.12 \mathrm{g} \mathrm{mL}^{-1}$
Density of solution $=3.12 \mathrm{g} \mathrm{mL}^{-1}$
Volume of solution $=1.5 \mathrm{mL}$
Mass of solution = Volume $\times$ Density
$=1.5 \mathrm{mL} \times 3.12 \mathrm{g} \mathrm{mL}^{-1}$
$=4.68 \mathrm{g}=4.7 \mathrm{g}$ (up to $2$ significant figures)
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