(02.01 MC) Which of the following explains how one of the postulates in John Dalton's
atomic theory later became robust knowledge? (5 points)
Select one:
a. Some scientists found that some atoms of a particular element have
different number of neutrons.
b. Various scientists found that atoms combine in simple whole number ratios
to form compounds.
C. Some scientists found that atoms consist of subatomic particles with varying
mass and charge.
d. Various scientists found that sometimes a fraction of an atom can take part
in a chemical reaction.

What neutral atom is isoelectronic to mn+4

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?