When one applies a force over a distance causing the object to move in response to the force they have

When force is applied on an object, then the object responds to the applied force in one of the two ways: it can either remain in its original state/position or if the force is sufficient enough then it can move.

If the applied force moves the object then work is done on the object. It can be expressed as:

Work done = Force * Distance

Thus, When one applies a force over a distance causing the object to move in response to the force they have shown work

the awnser is group 12

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