Question

HELP ASAP! PLEASE PLEASE PLEASE Suppose a reaction begins with 54 molecules of B2 and 126 molecules of A2 which react as completely as possible according to the equation B2 + 3 A2 --> 2 BA3. How many B2 molecules will be present in the container at the end of the reaction?

Answer 1

Answer:

Explanation:

For one B2 molecule 3 A2 molecules are reacting means,

the ratio is  1:3

Out of 126 molecule = 126/3 =42 molecules are required for the reaction,

therefore the 54-42= 10 molcules of B2 will reamin in the  end of reaction.