The relationship between the Kelvin temperature and volume of a gas is linear until the temperature begins to approach 0 K. why?

See explanation

Explanation:

We must remember that gases exhibit ideal gas behavior at ordinary temperature and pressure.

As the system approaches absolute zero gas laws begin to break down and the relationship linear  between volume and temperature (Charles law is broken).

Recall that, at absolute zero, the volume of an ideal gas would be zero and all molecular motion stops due to the fall in temperature and kinetic energy of the molecules.

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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.

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