If the average speed of a car is 110km/h how many hours would it take for the car to travel 715km?

6.5hrs

Explanation:

The following were obtained from the question ;

Speed = 110km/h

Distance = 715km

Time =?

Speed = Distance / Time

Time = Distance / Speed

Time = 715/110

Time = 6.5hrs

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.