select the correct answer from each drop - down menu. to prepare a 2 m solution of potassium nitrate (kno₃)…

select the correct answer from each drop - down menu. to prepare a 2 m solution of potassium nitrate (kno₃), which quantities must be measured? the mass of the and the volume of the must be measured.

select the correct answer from each drop - down menu. to prepare a 2 m solution of potassium nitrate (kno₃), which quantities must be measured? the mass of the and the volume of the must be measured.

Answer

Explanation:

Step1: Recall molarity formula

Molarity ($M$) is defined as $M=\frac{n}{V}$, where $n$ is the number of moles of solute and $V$ is the volume of the solution in liters. To find the number of moles of solute ($n$), we use $n = \frac{m}{M_m}$, where $m$ is the mass of the solute and $M_m$ is the molar - mass of the solute.

Step2: Determine required measurements

To prepare a solution of a given molarity, we need to measure the mass of the solute to calculate the number of moles and the volume of the solution. For a 2 M solution of potassium nitrate ($KNO_3$), the solute is potassium nitrate and the solution is the combination of potassium nitrate and the solvent.

Answer:

The mass of the potassium nitrate ($KNO_3$) and the volume of the solution must be measured.