If a sample of pure calcium (ca) contains 4.69 x 1022 atoms of iodine, how many moles of calcium are in the sample? . a) 0.0779 mol. b) 0.130 mol. c) 7.78 mol. d) 12.8 mol

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.

How manyatoms of mercury are in 1.4214e+1 ml sample

Why is the structure of molecule important to its function?