Which of the following is an ionic compound?
O CO2
O H2O
O CH4
OKCI

the first one since it mean carbon oxide

Explanation:

and u need a cation and anion to create a compound which is what that is

6.4 cm (max) - 25 cm (min)

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )