Which of the following pairs of aqueous solutions will form a precipitate when mixed?
a) na2 so4 + koh
b) cas + na2so4
c) k2co3 + nacl
d) none of these solution pairs will produce a precipitate.
e) all of these solution pairs will produce a precipitate.

How would you reduce the volume of gas

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.