Which represents the balanced double displacement reaction between sodium chloride (na+cl-) and copper sulfate (cu2+(so4)2-) ? nacl + cu(so4) --> na2(so4) + cucl2 nacl + cu(so4) --> na(so4) + cucl 2nacl + cu(so4) --> na2(so4) + cucl2 nacl + cu(so4) --> cl(so4) + nacu

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

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?

What can be found in the ionosphere