25. (06.06 MC) A
Theo created the following table for his observations on balanced and unbalanced forces. Which two measurements correctly complete the table? (2 points)
Amount of Force
Balanced,
Unbalanced
85 N
Unbalanced
30 N
Unbalanced
O 85 N in row one and 35 N in row two
O 90 N in row one and 30 N in row two
O 80 N in row one and 35 N in row two
O 85 N in row one and 100 N in row two

3 1/4 %

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