In the spring of 1984, concern arose over the presence of ethylene dibromide, or edb, in grains and cereals. edb has the molecular formula c2h4br2 and until 1984 was commonly used as a plant fumigant. the federal limit for edb in finished cereal products is 30.0 parts per billion (ppb), where 1.0 ppb = 1.0 ✕ 10−9 g of edb for every 1.0 g of sample. how many molecules of edb are in 1.9 lb of flour if 31.5 ppb of edb is present?

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?