3. In which compound is the oxidation state of oxygen -1? (Show why) (a) 02 (b) H20 (c) H2SO4 (d) H2O2 (e) KCH3COO

4. Which of the following metals will be oxidized by Pb(NO3)2: Zn, Cu, Fe? Why?

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Which tool is least in predicting weather