An acid (x) reacts with a base (y) to produce mg3(po4)2. what are x and y?

(d) liquid is being formed.

explanation:

the enthalpy of fusion of a substance (–hfus) is the change in its enthalpy when the substance changes its state from a solid to a liquid. it happens when heat is supplied to some quantity of substance which is originally in solid state & it turns into liquid.

example- melting of ice.

to melt ice energy is required. approximately, 333 kj of energy is needed to heat 1 kg ice to convert into liquid.

gases have the most amount of energy because there is space allowing more collisions

answer = 4.5

rationale:

the element mg comes with a 2+ ion and no3 comes with -1 ion thus 3 * 1.5 m = 4.5 basically look up what mg ion is on google and it says mg+2 and no3 ion no3- im assuming you cant though so look at the formula.

mg(no3)2, mg gave 2 to no3 but where is mg's number? its 1 so 2+1 = 3

* # m = ans