Why does every chemical reaction require a certain amount of activation energy? OA.
Energy is released when the reactants begin to react.
OB.
Energy lost to the environment during the reaction must be replaced.
O C.
Forming the activated complex requires energy.
OD.
The products have more potential energy than the activated complex.
E.
The reactants have less potential energy than the products.

the temperature of the gas, in k, not celsius.

the answer is d. 74.02

може ли да зареждате повече информация, моля

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