The decomposition of potassium chlorate is used as a source of oxygen in the lab. How many moles of KCIO3 are needed to produce 15 moles of oxygen gas? Step 1: balance the equation: KCIO3 → 2 KCI + 3 02 Step 2: PLAN: given = 15 g 02 unknown mol KCIO3 Step 3: MOLE RATIO: from your balanced equation, what is your conversion unit: 2 KCIO3 3 02 Step 4: Set up equation and calculate: 15 g O2 1

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.

In a ball-and-stick molecular model, what do the sticks represent?

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils