When pumping air into a tire, you have to pull back on the pump plunger to fill the pump with air. This increases the volume of the air inside the pump. This increase in volume has what effect on the gases inside the pump? Question 9 options:

the gas molecules inside the pump are able to spread out more which decreases the pressure of the gas.

the gas molecules inside the pump get compressed and packed closer together which decreases the pressure of the gas.

the gas molecules inside the pump are able to spread out more which increases the pressure of the gas.

the gas molecules inside the pump get compressed and packed closer together which increases the pressure of the gas.

Pulling back on the plunger allows you to put in more air into the pump and the more air you have inside a fixed volume, the greater the pressure becomes. (D)

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !