HELP NEEDED, ASAP How many grams of calcium carbonate are decomposed to produce 22.4 L of carbon dioxide at STP? (At. Masses: Ca = 40, C = 12, O = 16)
Select one:
a. 50 grams
b. 1000 grams
c. 90 grams
d. 100 grams

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.

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

Who determined the nature of chemical bonds?