If we approximate the atmosphere to be 78% nitrogen (n2) (by volume), 21% oxygen (02), an 196 argon (ar), estimate the density of air (in kg m3) at stp conditions (0 c, 1 atm).

the correct name for the n3 ion is azide. azide is a polyatomic anion with a -1 charge and is written as n3 -1. it consists of three nitrogen atoms bonded together. hope i . let me know if you need anything else.

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 previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter