Consider the reaction below.
zn(s)+cu2+ (aq) —> zn2+ (aq) + cu(s)
which half reaction correctly describes the oxidation that is taking place?
zn(s) --> zn2+ (aq)+e-
zn(s)-> zn2+ (aq) + 2e-
cu2+ (aq) + 2e-- cu(s)
cu2+ (aq)+e-- cu(s)

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

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?