12 a buffering solution is made from acetic acid (ch, co2h) and its conjugate base (ch3002 7. which reaction describes the buffering effect of the solution when an acid is
added to the solution?
ch, co2 (aq) + h+ (aq) + ch3coh(aq)
ch, co, h(aq) + oh(aq) - ch3c02"(aq) + h2o()
ch3co2 (aq) + h20(1) -- ch3co2h(aq) + oh(aq)
ch, co2h(aq) -- ch3c02 (aq) + h*(aq)

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Plz mark brainliest 30 points1) 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?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space