According to reference Table J, which reaction will occur spontaneously?
1) Co2+ + Cu(s) → Co(s) + Cu2+
2) Ag+ + Cu(s) → Ag(s) + Cut
3) Fe2+ + Hg(e) → Fe(s) + Hg2+
4) Mg2+ + Sn2+ + Mg(s) + Sn++

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter