What does the law of conservation of mass say?

a) the mass of the products in a chemical reaction is unrelated to the mass of the
reactants.

b) the mass of the reactants is greater than the mass of the products in a chemical
reaction.

c) the mass of the products in a chemical reaction is equal to the mass of the
reactants.

d) the mass of the reactants is less than the mass of the products in a chemical
reaction.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.

How do you determine the percent yield of a chemical reaction