Which is true if the weak base is stronger than the weak acid?

⚛ The stronger the base, the weaker its conjugate acid. ⚛ The weaker the base, the stronger its conjugate acid. In introductory chemistry courses, this relationship is usually expressed in the following terms: ⚛ A strong Brønsted-Lowry acid has a weak conjugate base.

Explanation:

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2