Abaker prepares two pans of cake batter. when one pan is put in an oven, the butter bakes into a cake. the other pan is left on a countertop and the batter remains unchanged. both pans contained the same chemicals. why do the chemical reactions involved in baking only occur in one of these pan of cake batter?

Because, the cake that was put into the oven was baked therefore changing its form and cooking the ingredients inside. The cake that was left out on the counter top had no changing factors because there was nothing being done to the cake, therefore remaining in its un-baked state.

the answer is c

tell me if wrong

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