That's how you can When atoms and molecules start getting Jumpy
This thing can make steak and potatoes that are lumpy.
Plastikos is the Greek word for this stuff made of crude.
We use it to make dishes and little boxes for our food.
Scientists call it sucrose but here's a hint you should take.
You eat it in candy. In juice and birthday cake.
It's liquid and important for life, no debate.
If we want it to be hard we put it here and just wait
Inside each small kernel is a drop of water you can't see
That's why it pops when it's hot and makes a snack for you and me
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2b2t

explanation:

2b2t

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

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