1 25.0 mL of 0.30 M HCl is used to completely neutralize 20.0 mL of KOH solution, what is the molarity of the base?
(1) 0.24 M
(2) 0.60 M
(3) 0.38 M
(4) 0.15 M

a polar bond is formed when electrons are shared unevenly between atoms

sure im new too!

explanation:

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