Question

Consider the following balanced equation: 4A + 5B ---> 4CD + 6EF. How many moles of A arerequired to completely react with 1 mole of B?O 1.25O 0.80O2.50O 20.00

Answer 1

We have the balanced equation. To determine how many moles of A are required we must review the stoichiometric coefficients of the reaction. The stoichiometric coefficients are the numbers that come before the molecule.

The stoichiometric coefficient of A is equal to 4 and that of B is 5, therefore the ratio of A to B is equal to 4/5.

If we have 1 mole of B, the moles of A needed are:

`molA=givenmolB*(4molA)/(5molB)`
`molA=1molB*(4molA)/(5molB)=0.80molA`

Answer: Second option. Are needed 0.80 mol of B