1. What would the relative humidity be if you had a 500 ml beaker with 200 ml of water in it? 2. How much water would the 500 ml beaker require to represent 90% humidity?

3. Briefly describe how this demonstration illustrates the correlation between air temperature and
relative humidity

a. What happens to the percentage of relative humidity as the temperature increases?

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The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

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.