Two gas cylinders have identical volumes and contain gases at identical temperatures and pressures. cylinder a contains hydrogen and cylinder b contains carbon dioxide. assuming ideal-gas behavior, which of the following variables differ for the two gases:
(a) number of gram-moles,
(b) number of molecules,
(c) masses,
(d) specific molar volumes (l/mol),
(e) mass densities (g/l)?
for each of the quantities that differ, which one is bigger and by how much? (assume ideal-gas behavior.)

a

explanation:

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 !

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

the answers would be

the first one and the second one