Question:1
You dissolve 312 mg of a compound(AwBxCyDz) in waterproducing 14.31 mL of solution and use the photometer and standardsolutions to find that the concentration of the A is 1.24 x10-2 M. The molar mass of A is 114.52 g/mol.
Moles of A in the solutionsample:________________________________
Mass of A in the solution sample:_________________________________
Mass % of A in the compound: _______________________________
Moles of A in 100 grams of the compound:________________________________
Question:2
The compound, AwBxCy, like allcompounds has an oxidation number of 0 (zero). The oxidation numberof A is +1, the oxidation number of B is +2, and the oxidationnumber of C is –1. If there are two moles of A for every 3 moles ofC in one mole of the compound, what is the empirical formula of thecompound?
Question:3
Given the compound,KwAlx(SO4)y(H2O)z.100.00 grams of the compound contains 8.24 grams of potassium and5.69 grams of aluminum. What is the formula of the compound?
