Which one of the following is a balanced equation? a. na (s) + mgf2 → 2naf (s) + mg (s) b. 2na (s) + mgf2 → 2naf (s) + mg (s) c. na (s) + o2 (g) → na2o d. zn (s) + hcl (g) → zncl2 (s) + h2 (g)

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?

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon

20 look at the clock and the data table below. based on the data and on your knowledge of potential and kinetic energy, what is the best conclusion you can make about potential and kinetic energy? the total amount of energy stays the same. the clock has the most potential energy at point b since it is moving the fastest. there is always more potential energy than kinetic energy. potential energy can never be 0, but you can have 0 kinetic energy.