1. Suppose you want to know the formula of a hydrate of magnesium bromide. If you heat 1.205g of the hydrate until all of the water is vaporized, the mass of anhydrous MgBr2 is 0.759g. What is the formula of the hydrate, i.e. what is the value of x in MgBr2xH2O ? (The formula weight of anhydrous magnesium bromide is 184.11g/mol ) 2. Balance the following equations by supplying the lowest whole numbers for w,x,y, and z : (a) wP4+xS8yP4S3 (b) wAs2S3+xO2yAs4O10+zSO2 (c) wCH4+xO2yCO2+zH2O 3. The elements sulfur and chlorine react to give sulfur dichloride according to the balanced equation: S8+8Cl28SCl2 Suppose you have 0.6445molS8. (a) How many moles of Cl2 are needed for complete reaction? (b) What mass of SCl2, in grams, can be produced? (The molar mass of SCl2 is 102.9714g/mol )