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Question 3 1 pts The bond length of HCl is 1.2746 Å. The mass of the 1H isotope of hydrogen is 1.007825 g/mol and the m...
Tim Question 1 1 pts Atte OM The force constant for the bond in an HCl...
Tim Question 1 1 pts Atte OM The force constant for the bond in an HCl molecule is k = 5 16 J m2. The mass of an 1H atom is 1.008 g/mol and the mass of a 35CI atom is 34.97 g/mol. Use this information to calculate the vibrational frequency, Ve, for a molecule of 1H35CI. Report your answer in units of 1/s. Question 2 1 pts The vibrational frequency for the H2 molecule is v=1.32x 1014 s 1...
The molecule 'H'F has a bond length of 0.9256 Å (9.256 x 10-11 m) and a...
The molecule 'H'F has a bond length of 0.9256 Å (9.256 x 10-11 m) and a spring constant, k, of 920 Nm"! The atomic masses are 1.007825 g mol-' for 'H and 18.998403 g mol-' for ''F. (a) Calculate the energy difference between the two lowest rotational states for 'H°F? Express your answer in cm! Calculate the energy difference between the two lowest vibrational states for 'H'F? Express your answer in cm! Assuming that we have a 1 cm x...
Question 10 1.5 pts Given that a chlorine-oxygen bond has an enthalpy of 243 kJ/mol, an...
Question 10 1.5 pts Given that a chlorine-oxygen bond has an enthalpy of 243 kJ/mol, an oxygen-oxygen bond has an enthalpy of 498 kJ/mol, and the standard enthalpy of formation of ClO2 102.5 kJ/mol, calculate the value for the enthalpy of formation per mole of ClO(g). What is the value for the enthalpy of formation per mole of CIO(g)? Enter your answer numerically, in terms of kJ, and to three significant figures.
5. Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) →...
5.
Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.202 gram piece of metal and combine it with 62.2 mL of 1.00 M HCl in a coffee-cup calorimeter. If the molar mass of the metal is 48.51 g/mol, and you measure that the reaction absorbed 111 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
Question 1 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq)...
Question 1 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.241 gram piece of metal and combine it with 60.4 mL of 1.00 M HCl in a coffee- cup calorimeter. If the molar mass of the metal is 57 g/mol, and you measure that the reaction absorbed 131 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
Question 1 1 pts Calculate the mass of potassium chloride, KCI, (in grams) formed when 7.00 g of chlorine gas is allowe...
Question 1 1 pts Calculate the mass of potassium chloride, KCI, (in grams) formed when 7.00 g of chlorine gas is allowed to react with 5.00 g of potassium. (write the chemical reaction first) 7.36 7.38 14.7 4.77 9.53 Question 2 1 pts Carbon dioxide is produced in the following reaction: 5 H2C204(aq) + 2 KMnO4 (aq) + 3 H2SO4 (aq) → 10 CO2(g) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H20 (1) What is the limiting reagent...
Question 3 1 pts The molar mass of carbon dioxide is g/mol. Use the periodic table...
Question 3 1 pts The molar mass of carbon dioxide is g/mol. Use the periodic table on the inside cover of your textbook. Question 4 1 pts A sample of NaHCO3 weighs 2.80g. The number of moles of NaHCO3 in the sample is .0333 moles. Question 5 1 pts A 2.83g sample of carbon dioxide contains .0643 moles of carbon dioxide.
Magnesium metal reacts with hydrochloric acid to give hydrogen gas. Mg + 2 HCl → MgCl2...
Magnesium metal reacts with hydrochloric acid to give hydrogen gas. Mg + 2 HCl → MgCl2 + H2 Use the following reaction information to answer the subsequent questions. Show all of your work. 92 mm Length of Magnesium ribbon: Barometric Pressure: 762.9 mmHg Water Temperature: 29 °C Initial Gas Volume: 0.00 mL Final Gas Volume: 67.35 mL 0.7559 Mass = Length (in mm) x (1000 mm) 1. Magnesium is usually found in the laboratory as a ribbon strip. Find the...
Question 6 1 pts Which of the following reactions is a standard formation reaction (i.e. АHræn...
Question 6 1 pts Which of the following reactions is a standard formation reaction (i.e. АHræn = AH) at T = 298 K? O 2 Fe (s) + 1.5 O2() → Fe2O3(s) O N2(1) + 2 O2(1) ► N204(1) O CO(g) + 2H2(g) + CH3OH(1) O C(s, graphite) + H2(g) + O2(g) → C6H1206(s) O Cl2(g) + H2(g) →2 HCl(g) Question 4 1 pts A sample of 1.71 moles of a substance was burned in a constant pressure calorimeter. The...
Mass of Magnesium strip Use the length of your magnesium strip and the mass per m...
Mass of Magnesium strip Use the length of your magnesium strip and the mass per m provided by your TA to calculate the mass of your magnesium strip. Make sure to convert so that your units match! Mass of magnesium strip Moles of magnesium used Convert the mass of each magnesium strip into moles using the molar mass. Moles of magnesium Moles of hydrogen produced (n) Use the mole ratio from the balanced chemical equation to convert the moles magnesium...
Tim Question 1 1 pts Atte OM The force constant for the bond in an HCl molecule is k = 5 16 J m2. The mass of an 1H atom is 1.008 g/mol and the mass of a 35CI atom is 34.97 g/mol. Use this information to calculate the vibrational frequency, Ve, for a molecule of 1H35CI. Report your answer in units of 1/s. Question 2 1 pts The vibrational frequency for the H2 molecule is v=1.32x 1014 s 1...
The molecule 'H'F has a bond length of 0.9256 Å (9.256 x 10-11 m) and a spring constant, k, of 920 Nm"! The atomic masses are 1.007825 g mol-' for 'H and 18.998403 g mol-' for ''F. (a) Calculate the energy difference between the two lowest rotational states for 'H°F? Express your answer in cm! Calculate the energy difference between the two lowest vibrational states for 'H'F? Express your answer in cm! Assuming that we have a 1 cm x...
Question 10 1.5 pts Given that a chlorine-oxygen bond has an enthalpy of 243 kJ/mol, an oxygen-oxygen bond has an enthalpy of 498 kJ/mol, and the standard enthalpy of formation of ClO2 102.5 kJ/mol, calculate the value for the enthalpy of formation per mole of ClO(g). What is the value for the enthalpy of formation per mole of CIO(g)? Enter your answer numerically, in terms of kJ, and to three significant figures.
5.
Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.202 gram piece of metal and combine it with 62.2 mL of 1.00 M HCl in a coffee-cup calorimeter. If the molar mass of the metal is 48.51 g/mol, and you measure that the reaction absorbed 111 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
Question 1 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.241 gram piece of metal and combine it with 60.4 mL of 1.00 M HCl in a coffee- cup calorimeter. If the molar mass of the metal is 57 g/mol, and you measure that the reaction absorbed 131 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
Question 1 1 pts Calculate the mass of potassium chloride, KCI, (in grams) formed when 7.00 g of chlorine gas is allowed to react with 5.00 g of potassium. (write the chemical reaction first) 7.36 7.38 14.7 4.77 9.53 Question 2 1 pts Carbon dioxide is produced in the following reaction: 5 H2C204(aq) + 2 KMnO4 (aq) + 3 H2SO4 (aq) → 10 CO2(g) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H20 (1) What is the limiting reagent...
Question 3 1 pts The molar mass of carbon dioxide is g/mol. Use the periodic table on the inside cover of your textbook. Question 4 1 pts A sample of NaHCO3 weighs 2.80g. The number of moles of NaHCO3 in the sample is .0333 moles. Question 5 1 pts A 2.83g sample of carbon dioxide contains .0643 moles of carbon dioxide.
Magnesium metal reacts with hydrochloric acid to give hydrogen gas. Mg + 2 HCl → MgCl2 + H2 Use the following reaction information to answer the subsequent questions. Show all of your work. 92 mm Length of Magnesium ribbon: Barometric Pressure: 762.9 mmHg Water Temperature: 29 °C Initial Gas Volume: 0.00 mL Final Gas Volume: 67.35 mL 0.7559 Mass = Length (in mm) x (1000 mm) 1. Magnesium is usually found in the laboratory as a ribbon strip. Find the...
Question 6 1 pts Which of the following reactions is a standard formation reaction (i.e. АHræn = AH) at T = 298 K? O 2 Fe (s) + 1.5 O2() → Fe2O3(s) O N2(1) + 2 O2(1) ► N204(1) O CO(g) + 2H2(g) + CH3OH(1) O C(s, graphite) + H2(g) + O2(g) → C6H1206(s) O Cl2(g) + H2(g) →2 HCl(g) Question 4 1 pts A sample of 1.71 moles of a substance was burned in a constant pressure calorimeter. The...
Mass of Magnesium strip Use the length of your magnesium strip and the mass per m provided by your TA to calculate the mass of your magnesium strip. Make sure to convert so that your units match! Mass of magnesium strip Moles of magnesium used Convert the mass of each magnesium strip into moles using the molar mass. Moles of magnesium Moles of hydrogen produced (n) Use the mole ratio from the balanced chemical equation to convert the moles magnesium...
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