Please help! use what you know of limiting reactants

Limiting reatant refers to a reatant that is used completely as the result its hinder the reaction to continue further .

In your problem you have to calculate number of moles for each reatant and the reatant having less moles is then limiting reatant . Then you will use it with its ratio to calculate t the moles of required . Then convert moles to grams

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