(Q1) Select the correct answer: 1. How many grams of aluminum (27g/mol) are required to prepare 16.0g of potassium alum (474g/mol) ? a. 0.35g b. 0.91g 2. A 0.350go c. 1,21g d. 8.13g of 699torr. What is occupies a measured volum a.70.2g/molb.34.8g/mol 3. How many g/mol) ? a. 16.3mL. c. 82.9g/mol 3. How many mL of 0.11MNaOH solution are required to react wit. 66.4g/mol 4. A 3.11g sample of unknown triprotic acid is dissolved in 50mL of waler, and then it d. 14.0ml is titrated with 48.60mL of a standard 0.69MNAOH solution. What is the molar mass of the unknown aci a. 278.2g/mol b. 30.8g/mol c. 106.5g/mol d. 133.3g/mot 5. A 10.0mL sample of original bleach solution (density =1.084gmL ) was diluted to 100mL. A 50.0mL is titrared with 28.2mL of 0.25M of NaS2O, solution. Calculate the percent by weight of the availahie chlorine in the onginal bleach sample? (Cl. (71g /mol). a. 4.6% b. 5.6% c. 3,6% a. 63% 6. A sample weighing 65.2g or unkngwn netal at 85.1C was dropped into a coffeeccup calorimerer containing 55.6g of water at 250C, the temperature of water increased to 29.3C. What is the atomic nass of the metai? Theat capacity of calorimeter =0J/C, spectific heat of watel a.39.6g/molb.91.0g/molc.132.1gmol