Which of the following reactions are redox reactions?
a. h2co3(aq) + 2nh3(aq) → 2nh4+(aq) + co32-(aq)
b. 2mg(s) + o2(g) + 2h2o(l) → 2mg2+(aq) + 4oh-(aq)
c. zn(no3)2(aq) + 2naoh(aq) → zn(oh)2(s) + 2nano3(aq)
d. 2h2o(l) + 2cl-(aq) → h2(g) + cl2(g) + 2oh-(aq)

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

What happens to the atomic radius when an elctron is lost

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.