Question

QUESTION 9 The density of acetonitrile, C2H3N, is 0.786 g ml. mass of acetonitrile does this represent? Suppose 16.1 ml. of acetonitrile is added to a reaction vessel. What QUESTION 10 Suppose 62.9 ml. of dichloromethane, CH2Cl2, was added to a reaction vessel. Using the density of 1.3266 g ml", how many moles does this represent? QUESTION 11 Consider the following chemical reaction: 4HCI + MnO2 - MnCl2 + 2H2O + Cl2 When 0.494 mol of HCI reacts stoichiometrically with MnO2, how many grams of Cl2 is produced?

Answer 1

Answer & Density of actoniturile C2H3N -0.75 g mlet Voleme of 11 - 16.1mL mass of Acetonitrile (angN=2 mass (m) = density (d) x Volume (V) so mass of Caugh = 0.7869 X 16.1 ml. me = 12.655 g (10) mass of Chillz - density of Chill 2x volume of H22 = 1.32608 x 62.90 mt - 83-443 g mole of Chall2 = weight of CH₂Cl2 molar mass of chall2 mole of Challa = nole of Chall2 = 83. 4439 65.tsz 84.93 glmol -10.982 moll & Hill & Mnoz Macl2 + 2H20 + 2 Form above equation. 4 mat till react with 1 mol mnoz to Prodelced 1 mol Macla; 2 mol the end 1.0 mol cle: 4.0mol the prodered - 1.0 mol ll2 1.0 no Hell would Produced – 1.0 mol cl . . I

0.494 mol I till hcl would would proceed = produced - 10 x0.997 mol 1.0. 40 - 0.9gt molcl2 4.0 0.12 35 mol cez mass of Cla = mole of 42 x molar mash of Cl2 - 0.1235 ml x 71.08 = 18. 7.68 g not 2.2 us Conceat et ehto S.I. cnit we know that so 1 us = 10-65] 2-2 us = 2.2x10-65 Os 6. 36.6 kmbit Connect it into sol. onlit. we know that 1 km til = 0.278 mis so 36.6km/h = 0.278436.6 m/s = 10.166 mis - 10.2 mis "Please rate it