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11 Nov 2019
I need help with number 7 and 10 could you please explain step by step how you got the Answer.
6. Consider the reaction dD + eE The rate law is Rate A[BITC Which of the following statements is incorrect? A)) The C catalyst exponents q and r are always equal to the coefficients a and b, respectively The exponent s must be determined experimentally C) The symbol k represents the rate constant D) The overall reaction order is q+rts E) The exponents q, r, and s are often integers. 7. The rate con tant for a first-order reaction is 1.8 x 10', ' at 710 K and 35x10" st 846 K. What is the activation energy? A) 10 kJ/mol B) 24 kJ/mol C)11 kJ/mol Constant =å 8, 314 D) 2900 kJ/mol E) 24 kJ/mol 8. What is the mole fraction of urea in a solution that contains 2.2 mol of urea and 3.0 mo of water? A) 0.62 B) 0.58 C) 0.42 D) 0.52 E) 0.77 9, What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.17 g of the nonvolatile solute urea, CO(NHz2, to 36.3 g of methanol, CHOH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg A) 15.8 mmHg B) 73.2 mmHg C) 5.14 mmHg 83.9 mmHg 79.8 mmHg D) Assume the density of the solution is 1.0 g/mL. (R 0.0821 L atm/(K mol) A) 2.0 atm B) 0.20 atm C) 1.0 atm D) 0.10 atm E) 1.2x 102 atm 10. At 29°C, what is the osmotic pressure of a 0.24% NaCl by weight aqueous solution? the freezing point of 103 g of benzene hy 0.36°C? (K for benzene is 5.12°C/m.)r A)140g/rnol B)2200gmo! (Cy93 grmoã. D) 160 gmol E) 35 gmol 11. What is the molar mass of an aromatic hydrocarbon if 0.67 g of the compound depresses lu 12. How many moles of urea (60, g/mol) must be dissolved in 77.1 g of water to give a 3.0 10? ual D1810 ml E) 0.23 mol
I need help with number 7 and 10 could you please explain step by step how you got the Answer.
6. Consider the reaction dD + eE The rate law is Rate A[BITC Which of the following statements is incorrect? A)) The C catalyst exponents q and r are always equal to the coefficients a and b, respectively The exponent s must be determined experimentally C) The symbol k represents the rate constant D) The overall reaction order is q+rts E) The exponents q, r, and s are often integers. 7. The rate con tant for a first-order reaction is 1.8 x 10', ' at 710 K and 35x10" st 846 K. What is the activation energy? A) 10 kJ/mol B) 24 kJ/mol C)11 kJ/mol Constant =å 8, 314 D) 2900 kJ/mol E) 24 kJ/mol 8. What is the mole fraction of urea in a solution that contains 2.2 mol of urea and 3.0 mo of water? A) 0.62 B) 0.58 C) 0.42 D) 0.52 E) 0.77 9, What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.17 g of the nonvolatile solute urea, CO(NHz2, to 36.3 g of methanol, CHOH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg A) 15.8 mmHg B) 73.2 mmHg C) 5.14 mmHg 83.9 mmHg 79.8 mmHg D) Assume the density of the solution is 1.0 g/mL. (R 0.0821 L atm/(K mol) A) 2.0 atm B) 0.20 atm C) 1.0 atm D) 0.10 atm E) 1.2x 102 atm 10. At 29°C, what is the osmotic pressure of a 0.24% NaCl by weight aqueous solution? the freezing point of 103 g of benzene hy 0.36°C? (K for benzene is 5.12°C/m.)r A)140g/rnol B)2200gmo! (Cy93 grmoã. D) 160 gmol E) 35 gmol 11. What is the molar mass of an aromatic hydrocarbon if 0.67 g of the compound depresses lu 12. How many moles of urea (60, g/mol) must be dissolved in 77.1 g of water to give a 3.0 10? ual D1810 ml E) 0.23 mol
Bunny GreenfelderLv2
24 May 2019