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# Environmental Chemistry

### ARCHAEOLOGICAL CHEMISTRY

Answer the following questions, showing calculations and equations where appropriate: 1. Your analytical technique directly and accurately measures the concentration of iron-54 in your samples. How would you calculate the total iron concentration from these concentrations? What if you wanted to know the iron-oxide concentrati

### Wet Limestone Process

Assume that the wet limestone process requires 1 metric ton of calcium carbonate to remove +35.0% of the sulfur from 4 metric tons of coal containing +4.0% S. Assume that the sulfur product is calcium sulfate. Calculate the percentage of the limestone (calcium carbonate) converted to calcium sulfate.

### Calculating the average number of air molecules at a specific altitude and atmospheric temperature.

At an altitude of 55.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude? Hint: Solve the equation for the pressure as a function of height and temperature and from this use the ideal gas equation to calculate the volum