Write the net ionic equation for each of the following sets of reactants. a. Ba(OH)2(aq) + HNO3(aq)

b. (NH4)2CO3(aq) + CaCl2(aq)

c. Na2S(aq) + ZnCl2(aq)

d. KCl(aq) + NaNO3(aq)

Compare and contrast physical changes with chemical changes.

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: