Zn(s)+S(s)-ZnS(s)
What is the physical state of both the reactants and the products?

The Reactants are Zinc (Zn) and Sulfur (S).

The Product is Zinc Sulfide (ZnS).

All of them are solids.

The combined masses of the reactants must be 14 grams, too. Later in Chemistry you'll learn that's not really true, but it is for now.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.