Which reactions are oxidation-reduction reactions? check all that apply.
2na+ cl2 → 2naci
pb(oh)2 → pbo + h2o
cu + 2agno3 → cu(no3 h + 2ag
znbr2 + 2agno3 → 2agbr + zn(no3)2
ch, +202 -co2 +h20

Name the intersection of plane bpq and plane cpq.

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.