3. Why is the electron cloud model of the atom considered more accurate than Bohr's model?
A. Individual electrons are known to orbit the nucleus in predictable paths.
B. The exact location of any single electron in an atom cannot be predicted.
C. The electron cloud is too far away from the nucleus in Bohr's model.
D. Bohr's model is too specific on which part of an atom has an electric charge.

A6.10 m nacl can be made by adding [x]g of nacl to a container and making the volume of water up to the 1.00 l line

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption