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In this reaction n2o4(g)→2no2(g) what changes in color would you expect as pressure is increased at a constant temperature

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

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?