What will happen to the density of a substance if it contracts when it freezes? 1. density will decrease 2. density will increase 3. density will remain the same 4. change in density cannot be predicted

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.

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

What causes most sediment to wash or fall into a river