Which nuclide is most likely to be radioactive and synthetic 24/12 mg237/93mg195/78mg230/84mg

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2

How many grams of mgbr2 are needed to produce 75g or metal?