What is the kb of a 0.0200 m ( at equilibrium) solution of methyl amine, ch3nh2, that has a ph of 11.40? why won't it let me answer this? i have the correct answer and a detailed explanation, but the answer on there currently is incorrect. they find an incorrect ka because they use the concentration of the base in the denominator of the ka equation, which should be the acid. you get the poh from 14-11.4=2.6 and then get oh- concentration= 10^-2.6 and the kb= (10^-2.6)^2/.02m so kb= 3.15 × 10−4

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

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

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?