Explain the damage that can be caused by performing presumptive drug tests as confirmatory tests. Proper spelling, grammar, and sentence structure are expected.

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Find the mass, in grams, of 5.00*10^23 molecules of f2