Place several pounds of sugar and a gallon of water in a big pot and try to see how much sugar can dissolve in that gallon. Add more and more sugar, and finally it stops dissolving. a. Explain what happened to the molecules of water and sugar at this point.

Remember that temperature is a factor that affects solubility.

b. Describe what you can do to your pot of room temperature sugar water to get more sugar to dissolve, using this factor.

c. Explain the changes at the molecular level.

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.