Question

a student is trying to measure 3.00 ml of water with a mohr pipet. they measure the water, dispense it into a beaker, and take a mass. the mass of the water turns out to be 2.985 g. the temperature in the lab is 22.0 °c. if the density of water at that temperature is 0.9977 g/ml, what volume of water did the student measure? select one: 3.00 ml 2.985 ml 2.992 ml 2.978 ml 0.9977 ml

Explanation:

Step1: Recall density formula

The density formula is $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume. We need to solve for $V$, so we can re - arrange the formula to $V = \frac{m}{
ho}$.

Step2: Identify given values

We are given that $m = 2.985$ g and $
ho=0.9977$ g/mL.

Step3: Calculate volume

Substitute the values into the formula: $V=\frac{2.985}{0.9977}\approx2.992$ mL.

Answer:

2.992 mL