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

Answer:

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

Explanation:

Step1: Recall molarity formula

Molarity ($M$) = $\frac{n}{V}$, where $n$ is the number of moles and $V$ is the volume of the solution in liters.

Step2: Find moles from mass

The number of moles ($n$) of a substance can be calculated as $n=\frac{m}{M_m}$, where $m$ is the mass and $M_m$ is the molar - mass. To prepare a solution of a given molarity (2 M in this case), we first need to know the number of moles of the solute ($KNO_3$). We find the number of moles from the mass of $KNO_3$ using its molar - mass. And we also need to measure the volume of the final solution to achieve the desired molarity.