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21. 13.5 g of NaCl is dissolved in 100.0 g of H20. The boiling point of...
21. 13.5 g of NaCl is dissolved in 100.0 g of H20. The boiling point of...
21. 13.5 g of NaCl is dissolved in 100.0 g of H20. The boiling point of the water after the salt is added is The boiling point elevation constant for water: Kp = 0.512 °C/m. A) 102.4° C B) 101.2°C C) 104.5°C D) 108.4°C 22. A process has an equilibrium constant K of 2.5 x 10' at 300 K. What is AG° at that temperature? A) 19.5 kJ/mol B) 25 kJ/mol C) -19.5 kJ/mol D) 75 kJ/mol 23. In heterogeneous...
20. 25.87 mL of aqueous HCl is titrated to endpoint with 28.16 mL of aqueous NaOH....
20. 25.87 mL of aqueous HCl is titrated to endpoint with 28.16 mL of aqueous NaOH. The NaOH concentration is 0.1146 M. What is the HCl concentration? A) 0.1146 M B) 0.2292 M C) 0.1247 M D) 0.0624 M 21. 13.5 g of NaCl is dissolved in 100.0 g of H20. The boiling point of the water after the salt is added is The boiling point elevation constant for water: K = 0.512 °C/m. A) 102.4° C B) 101.2°C C)...
22. A process has an equilibrium constant K of 2.5 x 10' at 300 K. What...
22. A process has an equilibrium constant K of 2.5 x 10' at 300 K. What is AGⓇ at that temperature? A) 19.5 kJ/mol B) 25 kJ/mol C) -19.5 kJ/mol D) 75 kJ/mol 23. In heterogeneous catalysis, the catalyst and reactants are in A) the same B) different C) gaseous phases. D) liquid 24. If the reaction quotient Q. is smaller than K, the reaction will proceed A) to produce more product B) to produce more reactant C) nowhere D)...
What is the boiling point elevation of a solution containing 17.1 g of sucrose in 100.0...
What is the boiling point elevation of a solution containing 17.1 g of sucrose in 100.0 g of water? The molal elevation constant of water is 0.512°C/m and the molar mass of sucrose is 342 g/mol.
24. If the reaction quotient Qe is smaller than K., the reaction will proceed A) to...
24. If the reaction quotient Qe is smaller than K., the reaction will proceed A) to produce more product B) to produce more reactant C) nowhere D) to stoichiometric completion 25. The oxidation number (state) for iron (Fe) in FeCl2 is A)-1 B) +2 C) +3 D) -2 Page 4 26. In general, as temperature increases, reaction rate A) increases B) decreases C) remains constant D) stoichiometrically converts 27. A) Oxidation occurs at the anode of a spontaneous galvanic cell....
The boiling point of water is 100.0°C at 1 atmosphere. How many grams of manganese(II) bromide...
The boiling point of water is 100.0°C at 1 atmosphere. How many grams of manganese(II) bromide (214.7 g/mol), must be dissolved in 270.0 grams of water to raise the boiling point by 0.300°C? Refer to the table for the necessary boiling or freezing point constant Solvent Formula Water H20 Ethanol CH3CH2OH Chloroform CHCI: Benzene CH Diethyl ether CH2CH OCH CH3 K (°C/m) Kr(°C/m) 0.512 1.86 1.22 1.99 3.67 2.53 5.12 2.02 g manganese(II) bromide.
Will leave a thumbs up!! A) The boiling point of water is 100.0°C at 1 atmosphere....
Will leave a thumbs up!! A) The boiling point of water is 100.0°C at 1 atmosphere. How many grams of potassium nitrate (101.1 g/mol), must be dissolved in 268.0 grams of water to raise the boiling point by 0.500°C? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 _____g potassium nitrate. B)...
3. The normal boiling point for the chloro-fluoro- hydrocarbon C,C1,F3 is 47.6°C: C C1,F3(1) C_C1zFz (g)...
3. The normal boiling point for the chloro-fluoro- hydrocarbon C,C1,F3 is 47.6°C: C C1,F3(1) C_C1zFz (g) We have []Hºvap = 27.49 kJ/mol. What is [Sºvap for the vaporization of C ClzFz at its normal boiling point? a) b) c) d) 33.1 J/K mole 5.2 J/K mole 71.2 J/K mole 85.7 J/K mole 4. For the following chemical reaction: H2(g) + CO(g) CH,Og) we have [H°(298) = 1.9 kJ/mole and [S°(298) = -109.6 J/Kmole. What is []Gº(298) for this reaction? a)...
8. What is the final boiling point of a 1.25 molal solution of sugar in water?...
8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether....
5) The reaction PC13(g) + Cl2(g) → PC15(g) has a AS of -170.2 J/molK and a...
5) The reaction PC13(g) + Cl2(g) → PC15(g) has a AS of -170.2 J/molK and a AHⓇ of -87.9 kJ/mol. Assuming the values of AHⓇ and AS are constant, what is the AGⓇ value for the reaction at 120°C? A) -108.3 kJ/mol B) -21.0 kJ/mol C) -154.8 kJ/mol D) -67.5 kJ/mol 6) Which of the following observations indicates that the enthalpy change of a reaction does NOT determine if a reaction is spontaneous? A) Organic compounds can burn in the...
21. 13.5 g of NaCl is dissolved in 100.0 g of H20. The boiling point of the water after the salt is added is The boiling point elevation constant for water: Kp = 0.512 °C/m. A) 102.4° C B) 101.2°C C) 104.5°C D) 108.4°C 22. A process has an equilibrium constant K of 2.5 x 10' at 300 K. What is AG° at that temperature? A) 19.5 kJ/mol B) 25 kJ/mol C) -19.5 kJ/mol D) 75 kJ/mol 23. In heterogeneous...
20. 25.87 mL of aqueous HCl is titrated to endpoint with 28.16 mL of aqueous NaOH. The NaOH concentration is 0.1146 M. What is the HCl concentration? A) 0.1146 M B) 0.2292 M C) 0.1247 M D) 0.0624 M 21. 13.5 g of NaCl is dissolved in 100.0 g of H20. The boiling point of the water after the salt is added is The boiling point elevation constant for water: K = 0.512 °C/m. A) 102.4° C B) 101.2°C C)...
22. A process has an equilibrium constant K of 2.5 x 10' at 300 K. What is AGⓇ at that temperature? A) 19.5 kJ/mol B) 25 kJ/mol C) -19.5 kJ/mol D) 75 kJ/mol 23. In heterogeneous catalysis, the catalyst and reactants are in A) the same B) different C) gaseous phases. D) liquid 24. If the reaction quotient Q. is smaller than K, the reaction will proceed A) to produce more product B) to produce more reactant C) nowhere D)...
24. If the reaction quotient Qe is smaller than K., the reaction will proceed A) to produce more product B) to produce more reactant C) nowhere D) to stoichiometric completion 25. The oxidation number (state) for iron (Fe) in FeCl2 is A)-1 B) +2 C) +3 D) -2 Page 4 26. In general, as temperature increases, reaction rate A) increases B) decreases C) remains constant D) stoichiometrically converts 27. A) Oxidation occurs at the anode of a spontaneous galvanic cell....
The boiling point of water is 100.0°C at 1 atmosphere. How many grams of manganese(II) bromide (214.7 g/mol), must be dissolved in 270.0 grams of water to raise the boiling point by 0.300°C? Refer to the table for the necessary boiling or freezing point constant Solvent Formula Water H20 Ethanol CH3CH2OH Chloroform CHCI: Benzene CH Diethyl ether CH2CH OCH CH3 K (°C/m) Kr(°C/m) 0.512 1.86 1.22 1.99 3.67 2.53 5.12 2.02 g manganese(II) bromide.
3. The normal boiling point for the chloro-fluoro- hydrocarbon C,C1,F3 is 47.6°C: C C1,F3(1) C_C1zFz (g) We have []Hºvap = 27.49 kJ/mol. What is [Sºvap for the vaporization of C ClzFz at its normal boiling point? a) b) c) d) 33.1 J/K mole 5.2 J/K mole 71.2 J/K mole 85.7 J/K mole 4. For the following chemical reaction: H2(g) + CO(g) CH,Og) we have [H°(298) = 1.9 kJ/mole and [S°(298) = -109.6 J/Kmole. What is []Gº(298) for this reaction? a)...
8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether....
5) The reaction PC13(g) + Cl2(g) → PC15(g) has a AS of -170.2 J/molK and a AHⓇ of -87.9 kJ/mol. Assuming the values of AHⓇ and AS are constant, what is the AGⓇ value for the reaction at 120°C? A) -108.3 kJ/mol B) -21.0 kJ/mol C) -154.8 kJ/mol D) -67.5 kJ/mol 6) Which of the following observations indicates that the enthalpy change of a reaction does NOT determine if a reaction is spontaneous? A) Organic compounds can burn in the...
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