Which compound can act as both a brønsted-lowry acid and a brønsted-lowry base?
a. water
b. oxygen
c. sodium hydroxide
d. hydrochloric acid

Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Which element is the least metallic between cadmium, silver, zinc, or iron?