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33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran...
34. The phase changes B-C and D - E are not associated with temperature increases because...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH =...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH = change in enthalpy, soln = solution) AH = ΔΗ + ΔΗ + ΔΗ soln 'solute solvent mix A) AH mix will always be an endothermic process B) AHsolute and AHsolvent are sometimes exothermic processes C) Holvent makes no contribution to the overall AH,on D) AHsolute and AHsolvent will always be endothermic processes E) None of the statements are true 39. What are the three...
32. A solvent has a pure vapor pressure of 160.0 torr at room temperature. 0.50 mol...
32. A solvent has a pure vapor pressure of 160.0 torr at room temperature. 0.50 mol of a nonvolatile solute is added to 5.50 mol of the solvent to form a solution. The vapor pressure of the liquid above this solution is A) 174.7 torr B) 13.4 torr C) 160 torr D) 146.7 torr 33. The following scheme depicts what type of chemical reaction? Page 5 » H-N-CH2N-H + n HOC(CH3COH - Adipic acid -CICH) cf. + 2 H20 Nylon...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change in enthalpy, soln = solution) ΔΗ. = ΔΗ. + ΔΗ. + ΔΗ. 'soln 'solute 'solvent 'mix A) AH mix will always be an endothermic process B) AHsolute and AH solvent are sometimes exothermic processes C) Aholven makes no contribution to the overall AHoln D) AHolue and AHolvent will always be endothermic processes E) None of the statements are true 37. What type of concept...
36. How much heat is gained by nickel when 500 g of nickel is warmed from...
36. How much heat is gained by nickel when 500 g of nickel is warmed from 22.4 to 584"C? me specific 0.444 J/KB C). 37. Given the following data of the standard enthalpy changes, find the heat required for the reaction converting solid sulfur to gaseous sulfur at 298 K and I atm pressure. heat of nickel is A) 2000J B 4000 C) 60003D) 8000 E) 100003 A)-1013k/rnol B)+618klmol C)-618 kimiol D)-223 kinol E)+223 kinnol 38. Calculate the standard heat...
Which of the following factors determines what state a substance exists in (select all that apply) a. Size of mol...
Which of the following factors determines what state a substance exists in (select all that apply) a. Size of molecules b. Attractive forces between molecules c. Temperature d. The potential energy of the molecule e. Pressure f. Location of the molecules (in a jar/lab vs. 'outside' in the atmosphere or ocean) The term for changing from a liquid to a solid is _______ and is _________. Put endothermic or exothermic in the second blank. The term for changing from a...
Gas pressure is caused by: A) barometers B) temperature C) gas molecules condensing into a liquid...
Gas pressure is caused by: A) barometers B) temperature C) gas molecules condensing into a liquid D) gas molecules hitting other gas molecules E) gas molecules colliding with surfaces 7) 8) What is the molarity of a solution that results when 21.3 g of (NH4)3PO4 (MM- 149 g/mol) is dissolved C) 0.357 M E) 1.61 x 10- water and brought to a total volume of 250.0 mL? D) 85.2 M B) 2.28 M A) 0.572 M 9) What is the...
5) What is the major product of the following reaction? сн. H HBr CH, OO CHE...
5) What is the major product of the following reaction? сн. H HBr CH, OO CHE H CHS A) CH CH:CH-CH:Br B) CH3 CH3 -CH-CHE C) CH: CH--C-CH Br Br D) CH,Br CH3 -CH-CH Br E) CHE CH-C-CHE Br
please help me with these annoying multiple choice questions. Thanks Which of the following statements about the reaction shown on the right, in figure 2, is correct? 8. a.) The activation...
please help me with these annoying multiple choice
questions. Thanks
Which of the following statements about the reaction shown on the right, in figure 2, is correct? 8. a.) The activation energy of the reverse reaction is smaller than that On patential of the forward reaction b.) The reaction is endothermic c.) The second step of the reaction mechanism is the rate determining step d.) This mechanism is composed of two steps Figure 2: Potential energy diagram of a hypothetical...
2 pts) Which of the following reactions represents a standard formation reaction? a. 2C+02 → 2...
2 pts) Which of the following reactions represents a standard formation reaction? a. 2C+02 → 2 CO ) (bH20 (2)→ H2 (0+:02 (8) c. C+%2020 → CO2) d. Hz (+ 1.026 → Hz () (Brief!) explanation of your choice: 3) (2.5 pts) Based on the heating curve for iron pictured below, what temperature is the melting point of iron? Heating Curve for Iron a. (1.0 pts) Label with a letter / the segment in which iron 3500 exists as a...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH = change in enthalpy, soln = solution) AH = ΔΗ + ΔΗ + ΔΗ soln 'solute solvent mix A) AH mix will always be an endothermic process B) AHsolute and AHsolvent are sometimes exothermic processes C) Holvent makes no contribution to the overall AH,on D) AHsolute and AHsolvent will always be endothermic processes E) None of the statements are true 39. What are the three...
32. A solvent has a pure vapor pressure of 160.0 torr at room temperature. 0.50 mol of a nonvolatile solute is added to 5.50 mol of the solvent to form a solution. The vapor pressure of the liquid above this solution is A) 174.7 torr B) 13.4 torr C) 160 torr D) 146.7 torr 33. The following scheme depicts what type of chemical reaction? Page 5 » H-N-CH2N-H + n HOC(CH3COH - Adipic acid -CICH) cf. + 2 H20 Nylon...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change in enthalpy, soln = solution) ΔΗ. = ΔΗ. + ΔΗ. + ΔΗ. 'soln 'solute 'solvent 'mix A) AH mix will always be an endothermic process B) AHsolute and AH solvent are sometimes exothermic processes C) Aholven makes no contribution to the overall AHoln D) AHolue and AHolvent will always be endothermic processes E) None of the statements are true 37. What type of concept...
36. How much heat is gained by nickel when 500 g of nickel is warmed from 22.4 to 584"C? me specific 0.444 J/KB C). 37. Given the following data of the standard enthalpy changes, find the heat required for the reaction converting solid sulfur to gaseous sulfur at 298 K and I atm pressure. heat of nickel is A) 2000J B 4000 C) 60003D) 8000 E) 100003 A)-1013k/rnol B)+618klmol C)-618 kimiol D)-223 kinol E)+223 kinnol 38. Calculate the standard heat...
Gas pressure is caused by: A) barometers B) temperature C) gas molecules condensing into a liquid D) gas molecules hitting other gas molecules E) gas molecules colliding with surfaces 7) 8) What is the molarity of a solution that results when 21.3 g of (NH4)3PO4 (MM- 149 g/mol) is dissolved C) 0.357 M E) 1.61 x 10- water and brought to a total volume of 250.0 mL? D) 85.2 M B) 2.28 M A) 0.572 M 9) What is the...
5) What is the major product of the following reaction? сн. H HBr CH, OO CHE H CHS A) CH CH:CH-CH:Br B) CH3 CH3 -CH-CHE C) CH: CH--C-CH Br Br D) CH,Br CH3 -CH-CH Br E) CHE CH-C-CHE Br
please help me with these annoying multiple choice
questions. Thanks
Which of the following statements about the reaction shown on the right, in figure 2, is correct? 8. a.) The activation energy of the reverse reaction is smaller than that On patential of the forward reaction b.) The reaction is endothermic c.) The second step of the reaction mechanism is the rate determining step d.) This mechanism is composed of two steps Figure 2: Potential energy diagram of a hypothetical...
2 pts) Which of the following reactions represents a standard formation reaction? a. 2C+02 → 2 CO ) (bH20 (2)→ H2 (0+:02 (8) c. C+%2020 → CO2) d. Hz (+ 1.026 → Hz () (Brief!) explanation of your choice: 3) (2.5 pts) Based on the heating curve for iron pictured below, what temperature is the melting point of iron? Heating Curve for Iron a. (1.0 pts) Label with a letter / the segment in which iron 3500 exists as a...
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