Consider the energy transfers and transformations that occur when a person rides a bicycle. Describe this process by selecting the correct options from the drop-down menus.

Chemical energy is transformed into energy in the person's muscles.

(kinetic) - answer

Kinetic energy is from the person's legs to the pedals.

(transferred) - answer

Kinetic energy is

thermal energy due to friction when the wheels get warm.

(transformed into) - answer

aluminum

i guess but i think im right

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

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