A sample of a material has 40004000 radioactive particles in it today. Your mother measured 80008000 radioactive particles in it 3030 years ago. How many radioactive particles will the sample have 30 years30 years from today

Give the orbital configuration of the phosphorus (p) atom.

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?

Which of the following reactions represents an exothermic reaction? nh3(g) + 12.0 kcal ½n2(g) + 3/2 h2(g) ch4 + 2o2 co2 + 2h2o + 212,800 cal c + 2s cs2, h = 27,550 cal c(graphite) c(diamond), h = 0.45 kcal 2h2o 2h2 + o2, h = +58 kcal