The number of cars sold per day at a local car dealership, along with its corresponding probabilities, is shown in the succeeding table. Compute the variance and the standard deviation of the probability distribution by following the given steps.

Answer:
How do you calculate the boiling point of NaCl?
Solution. To find the temperature change elevation of a solvent by a solute, use the equation: ΔT = iKbm. ...
Calculate the Molality of the NaCl. molality (m) of NaCl = moles of NaCl/kg water. From the periodic table: ...
Find ΔT. ΔT = iKbm. ...
Answer. Adding 31.65 g of NaCl to 220.0 mL of water will raise the boiling point by 2.53 °C.
Explanation: