Given the following data/observations for experiment #43B [39B]: a. the mass of Benzyltriphenylphosphonium Chloride (BTPC)(limiting reactant) used was 0.486g. b. the observed melting point of the purified product was 145-149 °C. c. the mass of the purified product was 0.217 g. Calculate the theoretical and the percent yield of the purified product from the above data (show all appropriate calculations and units).

Purpose: The purpose of this lab is to determine the percent yield of hydrogen gas produced in the reaction of magnesium solid with hydrochloric acid under conditions of Standard Temperature and Pressure (STP). Directions: Begin by printing out the Generating Hydrogen Lab (pdf file) posted below, and read the introduction. Please watch the videos posted below, which will show you how the experiment was done and also explain the calculations needed in this lab exercise. The video explaining the calculations uses the data given in the lab manual, not the actual data from performing the experiments. Make sure to use the data given below as your data for trials 1 and 2. TRIAL 1 (from the 3-part video): Mass of Mg: 0.083 g Volume of H2 in cylinder: 73.2 mL Temperature of H2 gas: 298 K Barometric Pressure: 761 torr TRIAL 2: Mass of Mg: 0.066 g Volume of H2 in cylinder: 62.0 mL Temperature of H2 gas: 295 K (note a different temperature here, so there will be a different vapor pressure of…

Using the thermodynamic tables find the enthalpy of reaction for the reaction      B2H6 (g)   +   6 F2 (g)    -->    2 BF3 (g)   +    6 HF (g)     a. – 3877 kJ b. – 3912 kJ c. + 3877 kJ d. + 3947 kJ e. – 3947 kJ f. none of these g. + 572 kJ

Write and balance the reaction for the complete combustion of hexene, C6H12. (Use the lowest possible whole number coefficients. Omit states-of-matter from your answer.)