A car traveled a distance of 30 km in 20 seconds (1/3 hour). What was the speed of the car?

90.1km/hr

Explanation:

Given parameters:

Distance  = 30km

Time  = 20s  = 0.33hr

Unknown :

Speed of the car  = ?

Solution:

To solve this problem;

     Speed  =  

Now insert the parameters and solve;

 Speed  =   = 90.1km/hr

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

the answer is a and have a great day