A mixture consisting of 0.120 mol N2, 0.018 mol O2, 0.112 mol CH4, and an unknown amount of CO2 occupies a volume of 9.04 L at 25°C and 1.17 atm pressure. Assuming that the gases all behave as ideal gases, how many moles of CO2 are there in this sample?

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 !

answerspecific gravity;