Alfred Wallace’s contribution to evolutionary theory was:

Which feature of pea plants made them especially useful for Mendel’s experiments?

Which genotype produces a recessive phenotype?

(WCSU25) For each reaction listed below, select the most appropriate category from the drop down menu. a. This reaction occurs in your stomach when you take antacid tablets: 2 HCl (aq) + CaCO3 (s)

Ice floats in water due to the physical properties determined by the chemical arrangement of solid water (ice). Physically, why does ice float in water (2 points) and what is the chemical arrangement of ice that allows it to float (2 points)? 

(WCSU25) Acetylene (C2H2) gas is burned in welding and produces enough heat to melt metals and allow them to be fused together. a. Balance the chemical reaction below. C2H2(g)    +    O2(g)      

Which side effect is associated with MDMA?

(WCSU25) Provide the formal charges of the nitrogen and starred (*) oxygen in the following molecule.   N: O*:

(WCSU25) Select the intermolecular force(s) that are present in: CH3CH2OH

23. (WCSU25., 6 points) The balanced combustion reaction for methane is shown. CH4 (g)       +       2 O2 (g)