Which of the following solutions has the GREATEST concentration?

Question 4 options:

A. 1g of NaCl dissolved in 100mL of water
B. 2g of NaCl dissolved in 100mL of water
C. 1g of sugar dissolved in 500 mL of water
D. 2g of sugar dissolved in 500 mL of water

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Tell me the iupac name of the following compounds:

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.