Barium chloride reacts with cooper (ii) sulfate, to produce 0.0546 moles of barium sulfate how many moles of copper (ii) sulfate was needed to produce this amount?

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

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?

Which of the following units is not an official si unit