Fa sample of butene (c4h8) that has a mass of 136.6 g is combusted in excess oxygen, what is the mass of co2 that is produced?

c4h8 + 6 o2 --> 4 co2 + 4 h2o

Answer : The mass of produced will be, 429.264 grams

Explanation : Given,

Mass of = 136.6 g

Molar mass of = 56 g/mole

Molar mass of = 44 g/mole

First we have to calculate the moles of .

Now we have to calculate the moles of .

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 1 mole of react to give 4 moles of

So, 2.439 moles of react to give moles of

Now we have to calculate the mass of .

Therefore, the mass of produced will be, 429.264 grams.

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 number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.