how is the potential voltage of a redox determined and what is the voltage for cucl2 + zn -> zncl2 + cu?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous

An unsaturated hydrocarbon is a hydrogen-carbon compound with a. a network solid structure b. single bonds c. single bonds in a branched-chain structure d. double or triple bonds