HELP PLEASE Choose all below that are correct for physical properties:

physical properties can be used to identify unknown substances

differences in physical properties can be used to separate mixtures

physical properties can describe a substance

mass, volume, and the relationship between them are physical properties

Explanation is in the file

cutt.ly/rzNrBcz

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 !

is there any options? maybe im just not seeing them but i need the options to

-love shrooms