Na2s(aq)+cu(no3)2(aq)→nano3(aq)+cus (s)
express your answer as a chemical equation. identify all of the phases in your answer.

Explanation:

              Na₂S+Cu(NO₃)₂ → NaNO₃+ CuS

To balance the above chemical equation,

 let us put coefficients a, b, c and d at the back of the compounds. The coefficients are needed to balance the equation of the reaction.

                 aNa₂S+bCu(NO₃)₂ → cNaNO₃+ dCuS

Conservation of Na: 2a = c

                            S:   a = d

                            N:   2b = c

                            O:  6b = 3c

    let a = 1, c = 2, b = 1 , d = 1

         Na₂S + Cu(NO₃)₂ → 2NaNO₃  +  CuS

The phases:

          Na₂S + Cu(NO₃)₂ → 2NaNO₃  +  CuS

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

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 !