What is the usual oxidation number of oxygen in a compound? a: +1 b: +2 c: –1 d: –2

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

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

Drug abuse will not lead to physical and psychological dependence. true or false ?