The pH active species HCO − 3 (bicarb) then reacts with the water present. Bicarb is amphoteric and therefore can react with water as an acid or base. Identify the appropriate equilibrium reaction for the type of reaction and identify the appropriate equilibrium constant. Recall that K a1 refers to the first dissociation of carbonic acid ( H 2 CO 3 ) and K a2 refers to the second. It might be helpful to write the stepwise dissociation reactions. For the acid write the products and identify the appropriate K value.

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

What must occur for air masses to form fronts

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures