Determine the number of ch2cl2 molecules in 25.0 g ch2cl2.determine the number of ch2cl2 molecules in 25.0 g ch2cl2.

Answer : The number of molecules of are,

Explanation : Given,

Mass of = 25 g

Molar mass of = 85 g/mole

First we have to calculate the moles of .

Now we have to calculate the number of molecules of .

As, 1 mole of contains number of molecules of

So, 0.294 mole of contains number of molecules of

Therefore, the number of molecules of are,

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