Im confused How could crystals of a pure salt be prepared from dilute
sulfuric acid?
A add an excess of aqueous sodium hydroxide, filter, evapora
the filtrate to crystallisation point
B add an excess of copper (II) carbonate, filter, evaporate the
Tholunte
filtrate to dryness
copper sulfate
C add an excess of copper metal, filter, evaporate the filtrate
crystallisation point
add an excess of zinc oxide, filter, evaporate the filtrate to
crystallisation point

Soluble
insoluble​

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.

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li