What does subsistence mean?

In order for the reaction: Ca + CuSO4--> Cu + CaSO4 to occur, which of the following must be true? • Cu. must be above Ca on the activity series. • Ca must be above Cu on the activity series. • Heat must be applied to the reaction.

Which of the following provides the most evidence for the theory of plate tectonics?

Why are elements sometimes called pure

Which of the following compounds is a molecule? NaCl MgBr2 H2 AlCl3 Which of the following compounds is a molecule? NaCl MgBr2 H2 AlCl3

According to newtons first law of motion an object at rest tends to stay at rest unless what?

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?

Which one of the following Acids is most likely to hurt you? Acid A: 1.0 M; Acid B: 0.0001M

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.