Chem Exam 3 PLQ Questions With 100% Correct Answers.

10.46 g CO2 reacts with 5.29 g H2O to give 5.60 g C6H12O6. Determine the percent yield of glucose from this reaction. 6 CO2(g) + 6 H2O(l) → C6H12O6(aq) + 6 O2(g) Use the periodic table provided to calculate your molar masses. Enter your calculated percent yield below to 1 decimal place. Do NOT include units. - 78.4 36.5 mL of HCl (aq) was added to 36.5 mL of an aqueous NaOH solution in a coffee cup calorimeter. The temperature of the reaction solution increased from 20.0°C to 25.5°C. The density of the solution is 1.00 g/mL, and the concentration of both the hydrochloric acid and sodium hydroxide solutions were 1.25 M. cwater = 4.184 J/g·°C Calculate the enthalpy change for the reaction in kJ per mole of HCl. Enter your answer to 3 significant figures. Do NOT include units. Round only at the end of the whole calculation to avoid rounding errors. - -36.8 A 0.02325 L sample of xenon gas was originally at 7.5°C and 0.998 atm pressure. If its final volume is 13.64 mL and its final pressure is 685 mmHg, what is its final temperature in degrees Celsius? Enter your answer to one decimal place. Do not round until the end of the calculation. Do not enter units. - -124.5 A 1.225 g sample of lactose, C12H22O11 (342.34 g/mol), is ignited in the presence of excess O2 inside a bomb calorimeter. The temperature increased from 17.2°C to 27.2°C. Given that the heat capacity of the bomb calorimeter is 801.1 J/°C, determine ΔUrxn for the combustion of lactose in units of kJ/mol of lactose. C12H22O11(s) + 12 O2(g) → 12 CO2(g) + 11 H2O(l) Enter your answer to 3 significant figures. Do NOT enter units. Do not round until the last calculation to avoid rounding errors. Do not use scientific notation. - -2,240A 13.98 g sample of a metal with a temperature of 85.25°C was placed in 8.45g of water at 12.12°C. The final temperature of the system was 18.46°C. Calculate the specific heat of the metal in units of J/g·°C to determine which of the metals in the table below it was most likely to have been. cwater = 4.184 J/g·°C chromium lead sodium zinc silver gold aluminum tin iron - silver A 15.25 g sample of a pure elemental metal with a temperature of 85.25°C was placed in 8.45 g of water at 12.12°C. The final temperature of the system was 18.46°C. Identify the metal element using the table below. cwater = 4.184 J/g·°C lead silver sodium chromium aluminum iron tin zinc gold - tin A 724 mL sample of argon gas, initially at 5.0°C, is heated at constant pressure. If the final volume of the gas is 0.958 L, what is the final temperature in °C?Do not round any number until your final answer during your calculation. Enter your answer to 3 significant figures. Do NOT include units. - 94.9 A gas, initially at 2.05 atm and 3.45 L, expands to a volume of 12.35 L. What is the new pressure of the gas in atmospheres? Enter your answer to the correct significant figures. Do NOT include units. - 0.573