The charcoal from a tree killed in the volcanic eruption that formed a crater contained 43.5% of the carbon-14 found in living matter. if the half-life of carbon-14 is 5700 years, about how old is the crater?

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 !

it's filtration, but this is an assumption so my apologies if i got this

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the answer is c. nacl