Write the empirical formula for 4 ionic compounds that can be formed from the following ions: Pb4+, CrO2- 4 , Fe3+, C2H3O2-.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?

Will mark as brainliest ! how many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (ii) nitrate solution react with excess aluminum metal? show all work needed to solve this problem!