5 45, Balance each of the following oxidation-reduction
reactions, which take place in acidic solution, by us-
ing the "half-reaction" method.
a. Mg(s) + Hg2+ (aq) → Mg2+ (aq) + Hg22+(aq)
b. NO3- (aq) + Br (aq) → NO(g) + Brz(1)
c. Ni(s) + NO3- (aq) → Ni2+ (aq) + NO2(8)
d. C104 (aq) + Cl(aq) → ClO3- (aq) + Cl2(8)

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

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?

Amixture with the same composition throughout is!