What is the molarity of a solution that contains 28g of koh in 2l of solution?

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

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?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.