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Question 15 2 pts By what length will a slab of concrete that is originally 18...
7. (15 pts) Liquid nitrogen boils at 77 K at 1 atm. A common demonstration of...
7. (15 pts) Liquid nitrogen boils at 77 K at 1 atm. A common demonstration of the Lei- denfrost effect is to stick stick your finger into a dewar of liquid nitrogen. Assume that your finger can be modeled as a horizontal cylinder with diameter 1.0 cm, length 5.0cm, and skin temperature 32°C. Use 100 K for the properties of the nitrogen vapor. Neglect radiation. The density of liquid nitrogen is 1.251 kg/m', and its enthalpy of vaporization is 1.99x10J/kg....
Chapter 13 Temperature and Kinetic Theory D) As shown in the figure, a bimetallic strip, consisting...
Chapter 13 Temperature and Kinetic Theory D) As shown in the figure, a bimetallic strip, consisting of metal G on the top and metal on the bottom, is rigidly attached to a wall at the left. The coefficient of linear thermal expansion for metal G is greater than that of metal H. If the strip is uniformly heated, it will A) curve upward. B) curve downward. C) remain horizontal, but get longer. D) remain horizontal, but get shorter. E) bend...
just need answers no explanation required. Question 23 1 pts At what Kelvin temperature does the...
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need answers no explanation required.
Question 23 1 pts At what Kelvin temperature does the rms speed of the oxygen (O2) molecules in the air near the surface of the earth become equal to the escape speed from the earth? (R-8.31 /mol K;molar mass of O, gas is 32 g/mol; radius of the earth Re - 6.37 x 10ºm; the escape speed from the earth is 11.2 km/s) 1.6 x 10K 8.0 x 10K 1.1 x 10K 3.6 x...
may absorb 11. Carbon monoxide rcacts with oxygen to form carbon dionide 2 CO(g)+ 0(g)2 COg)...
may absorb 11. Carbon monoxide rcacts with oxygen to form carbon dionide 2 CO(g)+ 0(g)2 COg) In a 1.00 L flask, 4.30 atm of CO reacts with 2.50 atm of O. Assuming that the temperature remains constant, what is the final pressure in the flask? a. 4.30 atm b. 6.80 atm 1.80 atm d. 4.65 atm 2.50 atm c. e. 12. A balloon is filled with He gas to a volume of 2.10 L at 35 °C. The baloon is...
please explain why the answer is what it is! thank you! 6. (4 pts) What is...
please explain why the answer is what it is! thank you!
6. (4 pts) What is the value of K for the b for the hypothetical reaction: athetical reaction: 2D = A + 2B If the following information is known about the following elementary rxns: A + 2B Sc K = 3.3 CS2D K = 0.041 A) 81 B) 24 [041] C) 7.4 D) 0.45 E) 0.012 [3.3] 7. 14 pts) For the above Q6 hypothetical reaction, calculate the AG...
i need help with all these questions please Question 23 4 pts Which of these liquids...
i need help with all these questions please
Question 23 4 pts Which of these liquids is most likely to have the lowest (slowest) rate of evaporation (g/min) and why? Select the single best answer. H H H HH :01 IH terbaru H 11 HHH cnc- 7 H H H ica H 나 Hit 4 c B A ΟΟΟΟΟΟ C, because it has the highest molar mass. A, because this molecule has the lowest molar mass.. B, because it has...
Question 4 2 pts What is the percent mass of bicarbonate (HCO3 ) in if the...
Question 4 2 pts What is the percent mass of bicarbonate (HCO3 ) in if the original sample of alka-seltzer, at 0.4312g, had determine there was 0.00075 moles of HCO3? O 11% O 10.61% O 10.6% O 10.613% 2 pts Question 3 You have set up the apparatus for this experiment, as described in the lab manual, and collected the following data: Atmospheric pressure 728.0torr Temperature 25.8 °C Gas constant 0.08206 Latm/mol K You then ran the experiment using 0.3234...
0/ 1 pts Question 2 During a certain titration, 35.0 mL of 0.175 M aqueous sulfuric...
0/ 1 pts Question 2 During a certain titration, 35.0 mL of 0.175 M aqueous sulfuric acid was required to exactly neutralize 49.0 mL of sodium hydroxide. Determine the molarity of the base. H2SO4 (aq) + 2NaOH(aq) + 2 H2O (0) + Na2SO4 (aq) [balanced] 0.125 M 6.00 x 10 M 0.250 M 0.175 M 0.600 M 2ct Question 6 0/1 pts Calculate the pressure exerted by 5.12 grams of chlorine gas in a 850 mL sealed flask at 27.0°C....
5.(16 pts, 8min) Do either (a) or (b) (a) A sample of Ar(g) having a mass of 0.0166 g is collected over water. If t...
5.(16 pts, 8min) Do either (a) or (b) (a) A sample of Ar(g) having a mass of 0.0166 g is collected over water. If the temperature and total pressure of the system are 48.0°C and 676 mmHg respectively, what is the volume of the gas expressed in liters? Data: is 83.71 mmHg. R= 0.0821 L atm/(K mol), 1 atm 760 mmHg Atomic mass of Ar-39.95 and the vapor pressure of water at 48.0°C (b) Consider the following reaction: 2 NAOH(aq)+2...
6.5 18. (8 pts) The Diffusivity of nitrogen in y-iron is 4 times higher at 1200°C...
6.5 18. (8 pts) The Diffusivity of nitrogen in y-iron is 4 times higher at 1200°C than at 950 C. (a) Find the activation energy for nitrogen diffusion in iron. R 1.987 cal/mol-K Do exp (1.987- wal vevisit lo ala exo 29 26, 451 l 2430. 10 alalS 29 24.851 2430 29 2a 24 30. 19. (10 pts) To improve the wear resistance of a steel gear, a carburization process is employed to harden the surface of the machine element...
7. (15 pts) Liquid nitrogen boils at 77 K at 1 atm. A common demonstration of the Lei- denfrost effect is to stick stick your finger into a dewar of liquid nitrogen. Assume that your finger can be modeled as a horizontal cylinder with diameter 1.0 cm, length 5.0cm, and skin temperature 32°C. Use 100 K for the properties of the nitrogen vapor. Neglect radiation. The density of liquid nitrogen is 1.251 kg/m', and its enthalpy of vaporization is 1.99x10J/kg....
Chapter 13 Temperature and Kinetic Theory D) As shown in the figure, a bimetallic strip, consisting of metal G on the top and metal on the bottom, is rigidly attached to a wall at the left. The coefficient of linear thermal expansion for metal G is greater than that of metal H. If the strip is uniformly heated, it will A) curve upward. B) curve downward. C) remain horizontal, but get longer. D) remain horizontal, but get shorter. E) bend...
just
need answers no explanation required.
Question 23 1 pts At what Kelvin temperature does the rms speed of the oxygen (O2) molecules in the air near the surface of the earth become equal to the escape speed from the earth? (R-8.31 /mol K;molar mass of O, gas is 32 g/mol; radius of the earth Re - 6.37 x 10ºm; the escape speed from the earth is 11.2 km/s) 1.6 x 10K 8.0 x 10K 1.1 x 10K 3.6 x...
may absorb 11. Carbon monoxide rcacts with oxygen to form carbon dionide 2 CO(g)+ 0(g)2 COg) In a 1.00 L flask, 4.30 atm of CO reacts with 2.50 atm of O. Assuming that the temperature remains constant, what is the final pressure in the flask? a. 4.30 atm b. 6.80 atm 1.80 atm d. 4.65 atm 2.50 atm c. e. 12. A balloon is filled with He gas to a volume of 2.10 L at 35 °C. The baloon is...
please explain why the answer is what it is! thank you!
6. (4 pts) What is the value of K for the b for the hypothetical reaction: athetical reaction: 2D = A + 2B If the following information is known about the following elementary rxns: A + 2B Sc K = 3.3 CS2D K = 0.041 A) 81 B) 24 [041] C) 7.4 D) 0.45 E) 0.012 [3.3] 7. 14 pts) For the above Q6 hypothetical reaction, calculate the AG...
i need help with all these questions please
Question 23 4 pts Which of these liquids is most likely to have the lowest (slowest) rate of evaporation (g/min) and why? Select the single best answer. H H H HH :01 IH terbaru H 11 HHH cnc- 7 H H H ica H 나 Hit 4 c B A ΟΟΟΟΟΟ C, because it has the highest molar mass. A, because this molecule has the lowest molar mass.. B, because it has...
Question 4 2 pts What is the percent mass of bicarbonate (HCO3 ) in if the original sample of alka-seltzer, at 0.4312g, had determine there was 0.00075 moles of HCO3? O 11% O 10.61% O 10.6% O 10.613% 2 pts Question 3 You have set up the apparatus for this experiment, as described in the lab manual, and collected the following data: Atmospheric pressure 728.0torr Temperature 25.8 °C Gas constant 0.08206 Latm/mol K You then ran the experiment using 0.3234...
0/ 1 pts Question 2 During a certain titration, 35.0 mL of 0.175 M aqueous sulfuric acid was required to exactly neutralize 49.0 mL of sodium hydroxide. Determine the molarity of the base. H2SO4 (aq) + 2NaOH(aq) + 2 H2O (0) + Na2SO4 (aq) [balanced] 0.125 M 6.00 x 10 M 0.250 M 0.175 M 0.600 M 2ct Question 6 0/1 pts Calculate the pressure exerted by 5.12 grams of chlorine gas in a 850 mL sealed flask at 27.0°C....
5.(16 pts, 8min) Do either (a) or (b) (a) A sample of Ar(g) having a mass of 0.0166 g is collected over water. If the temperature and total pressure of the system are 48.0°C and 676 mmHg respectively, what is the volume of the gas expressed in liters? Data: is 83.71 mmHg. R= 0.0821 L atm/(K mol), 1 atm 760 mmHg Atomic mass of Ar-39.95 and the vapor pressure of water at 48.0°C (b) Consider the following reaction: 2 NAOH(aq)+2...
6.5 18. (8 pts) The Diffusivity of nitrogen in y-iron is 4 times higher at 1200°C than at 950 C. (a) Find the activation energy for nitrogen diffusion in iron. R 1.987 cal/mol-K Do exp (1.987- wal vevisit lo ala exo 29 26, 451 l 2430. 10 alalS 29 24.851 2430 29 2a 24 30. 19. (10 pts) To improve the wear resistance of a steel gear, a carburization process is employed to harden the surface of the machine element...
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