Hydrogen and oxygen are combined to form water according to the equation below: 2H2 + O2→2H2O How many moles of water are produced if 10 g of oxygen gas are reacted? Type your answer as a number with 1 significant figure. Make sure to include the correct units in your answer. Units are a type of measurement i. e. gram (g) or mole (mol). Do not include the chemical formula in your answer.

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.