Problems 307 How many milliliters of a 2.5 M NaCl solution would be needed to prepare each solution? a. 1.5L of a 0.75m solution ​

450 mL

Explanation:

First we calculate how many NaCl moles would there be in 1.5 L of a 0.75 M solution, using the definition of molarity:

Once again using the definition of molarity, we now calculate how many liters of a 2.5 M solution would have 1.125 moles:

Finally we convert 0.45 liters to mL:

the answer would be c

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds