While ms. brown's science class is studying changes in particle motion during phase changes, they add a few pieces of dry ice to a flask and cover it with a balloon. after a few minutes they observed the balloon starting to inflate. predict what will happen if they put the flask with the inflated balloon onto a hot plate and raise its temperature from room temperature to 40 °c.
a) no change occurs.
b) the balloon will deflate.
c) the dry ice precipitates.
d) the balloon inflates further.

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 answer would be a

you didnt put any of the following

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante