Applying the principle that the elements of a particular column in the periodic table share the same chemical properties, complete the following chart. the first one has been done for you.
formulanew combinationpredicted formula
cu₂osilver + oxygenag₂o
naclpotassium + chlorine
alcl₃aluminum + fluorine
co₂tin + oxygen
mgcl₂calcium + bromine
hclcesium + iodine
ccl₄silicon + bromine

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.)

Is powdered sports drink ionic or covalent ? 10pts !

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride