The density of the solution is 2.15 ~g ~mL^ -1 , then mass of 2.5 ~mL solution in correct significant figures is

Correct answer: B. 5.4 ~g aligned & Explanation: Density = Mass Volume & Density =2.15 g / mL , Volume of solution =2.5 mL & 2.15= Mass 2.5 Mass =5.375 g aligned The correct significant figure should have the same number of significant digits as the number with least number of significant digits. Mass =5.4 g

NEET 2022

Exam: NEET
Year: 2022
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

NEET 2022 · Chemistry · Some Basic Concepts of Chemistry

The density of the solution is 2.15 ~g ~mL^ -1 , then mass of 2.5...

The density of the solution is

2.15 \mathrm{~g} \mathrm{~mL}^{-1}

, then mass of

2.5 \mathrm{~mL}

solution in correct significant figures is

Options

A $5375 \times 10^{-3} \mathrm{~g}$
B $5.4 \mathrm{~g}$
C $5.38 \mathrm{~g}$
D $53.75 \mathrm{~g}$

Correct answer

B. $5.4 \mathrm{~g}$

Step-by-step solution

\begin{aligned} & \text{Explanation: Density }=\frac{\text{ Mass }}{\text{ Volume }} \\ & \text{Density }=2.15 \mathrm{ g} / \mathrm{mL} \text{, Volume of solution }=2.5 \mathrm{ mL} \\ & \therefore 2.15=\frac{\text{ Mass }}{2.5} \Rightarrow \text{ Mass }=5.375 \mathrm{ g} \end{aligned}

The correct significant figure should have the same number of significant digits as the number with least number of significant digits.

\therefore \text{ Mass }=5.4 \mathrm{ g}

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