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elp Center 3.03 Incorrect Question 10 0/2 pts A sample of propane gas cocuples 27 centimeter...
A sample of propane gas occupies 691 centimeter cube at 195 K. What is the final volume (in liters) at 272K?} A sample of Xenon gas at 55.7 psi and 100°C compressed from 3.00L to 0.500 L. If the temperature remains constant, what is the final pressure in atm?}
Question 2 15 pts A sample of sulfur hexafluoride gas occupies 9.10 L at 198°C. Assuming that the pressure remains constant, what temperature (in °C) is needed to reduce the volume to 2.50 L? - Previous Next
Incorrect 0/2 pts Question 1 A gas with a volume of 40 ml when pressure is 4 atm and the temperature is 298K. What is the pressure when the volume of the gas changed to 15 ml at 298K2 51
question 1&3 Incorrect 0/2 pts Question 1 What is the volume of 2.09 g of Ne gas at STP? 2.33 Question 2 2/2 pts What is the density of Xe (g) at STP? g/L 5.86 Incorrect Question 3 0/2 pts How many molecules of NH3(g) are present in 19.3 L at STP? molecules 5.189x10^23
Incorrect Question 8 0/1 pts 0.28 litre of an ideal monatomic gas (Cv.m 3R/2) initially at 2 °C and 95 atm pressure undergo an expansion against a constant external pressure of 1.02 atm, and do 1.2 k of work. The final pressure of the gas is 1.02 atm. Calculate the change in enthalpy, AH. Report your answer in J 3660
Incorrect Question 1 0/2.5 pts A container has 704 torr of gas in 666mL container. If after heating to 61C the pressure is 1.32 atm find the moles of gas that were in the container. 25.7 Incorrect Question 2 0/2.5 pts 2 NO + O2 -> 2 NO2 The NO in the reaction is 28C, 786torr, 984mL. What volume in Liter of Oz is required at 47C, 790 torr? 98.6
Question 10 of 22 A 4.05 g sample of an unknown gas at 35 °C and 1.05 atm is stored in a 2.15 L flask. What is the density of the gas? density: 1.88372 g/L What is the molar mass of the gas? molar mass: g/mol Incorrect Question 14 of 22 A gas mixture is made by combining 6.7 g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 15.14 L. What...
Incorrect Question 9 0/1 pts A water sample is contaminated by benzene at a concentration of 40 mg/L. If you have only 20 g of activated carbon, what is the volume of water (in mL) that can be treated to the final concentration of 5 mg/L. The Freundlich isotherm coefficients are K = 5 and n = 2.5 for concentrations in g/L. 205 mL 343 mL 292 mL 505 mL
0/2 pts Incorrect Question 8 What is the term for the pressure exerted by gas molecules in the air? Vapor pressure Partical pressure Barometric pressure Gas pressure Not yet graded/5 p Question 15 Free Response Calculate the moles of carbon dioxide produced at 22°C and 3 psi when 1.41 g of calcium carbonate reacts with 15.0 mL of 2M hydrochloric acid. Your Answer: 0.123 L
Please explain the correct answer for both questions. Thank you! Incorrect Question 5 0/1 pts A 25.0 mL sample of 0.723 M HCIO4 is titrated with 0.27 M KOH solution. The H30* concentration after the addition of 80.0 mL of KOH is M. (Cl is chlorine, not carbon and iodine) 0.4 3x10-13 1x107 0.7 4x10-2 Incorrect Question 6 0/1 pts What could be the pKof this weak acid according to the titration curve below? Weak Acid Titration Curve PH 10...