1. At 25 °C, the base ionization constant for NH3 is 1.8 x 10-5. a. Determine the pH of a solution prepared by adding 0.0500 mol of solid ammonium
chloride to 100 mL of 0.150 M ammonia.
b. Determine the percentage ionization of a 0.150 M solution of ammonia at 25 °C.
c. If 0.0800 mole of solid magnesium chloride is dissolved in a solution prepared by
adding 0.0500 mol of solid ammonium chloride to 100 mL of 0.150 M ammonia, will a
precipitate of magnesium hydroxide form? (Assume the volume of the solution is
unchanged. The solubility product constant for magnesium hydroxide is 1.5x10-11.)

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 to your question is c

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.