The half life of Nickel-59 is days . If we started with 80g of Nickel and ended up with 2.5g of Nickel how many days have passed.

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?

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What if it is did darwin used to support his theory of evolution