im timed help another student found and unlabeled marker in a desk and wants to know what kind it is permanent or wet erase they tested the solubility by writing on a piece of plastic 5 times then dipping it in 5 diffrent liquids

just use a white board then try to wipe it off if it doesn't come off then permanent then if permanenet use a dry erase marker over it to get it of

Explanation:

it works trust

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 !

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates