To a solution of NaCl, a crystal of NaCl is added and the crystal dissolved. How would you classify the original solution?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

What type of matter is made of only one kind of atom