11) Calculate the osmotic pressure associated with 90.0 g of an enzyme of molecular weight 98,000 g/mol dissolved in 2700 mL of benzene at 30.0 °C. A) 5.99 torr B) 1.96 torr C) 6.43 torr D) 2.48 torr 12) The rate constant for the first order reaction AB+C is k-44 x 10 min-¹ at 57 K. What is the half-life for this reaction at 57 K? A) 32 min D) 1200 min B) 16 min 13) Consider the following reaction: 2 N₂O(g) If the half-life for the reaction is 0.610 s, the rate constant is: A) 1.14 s¹ B) 0,69 sl 14) The decomposition of N:Os(g)-> NO2(g) + NO(g) proceeds as a first order reaction with a half-life of D) 0.32 s¹¹ 30.0 seconds at a certain temperature. If the initial concentration [N2Oslo -0.600 M, what is the concentration after 120 seconds? 4 A) 0.038 M a C) 9.1 min 2 NO(g) + O2(g); rate-k[N₂0] B) 0.100 M C) 0.400 M D) 0.013 M 15) Which equation below best gives the concentration of N₂Os versus time in the previous question Q14? A) [N₂0s] ([N₂Os])/t12 B) [N₂Os] = [N₂O₁Joe C) [N₂0₂]=kt D) 1/[N₂Os] - 1/[N2Oslo + kt C) 0.86 s 16) Given: N2(g) + 3 H₂(g) <-> 2NH₂(g) At equilibrium at a certain temperature, the concentration of NH3(g), H₂(g) and N₂(g) are 0.49 M, 1.61 M and 0.14 M, respectively. Calculate the value of Ke for this reaction. A) 1.26 B) 0.612 D) 1.96 C) 0.411 17) Consider the following reaction: 4 PCb(g) Pa(g) + 6 Cl₂(g) If the initial concentration of PCI(g) is 2.0 M, and "x" is the equilibrium concentration of P4(g), what is the correct equilibrium relation? A) Kc=6x7 B) Ke-6x7/(2.0-x)* 18) Consider the reaction represented by the equation: N2(g) + 3H₂(g) <-> 2NH3(g) Calculate the C) Ke=x7/(2.0-x) D) Kc-(x)(6x)/(2.0-4x)* equilibrium pressures at a certain temperature: PNH)-2.9 x 10 atm, PN-9x10 atm, PH₂-2.7x 10 atm A) 4.9 x10* B) 2.9x10 C) 6.3x10 55 D) 7.8x10 20) A particular vinegar solution has a H₂O concentration A) 17.3 B) 12.1 19) Consider the reaction represented by the equation: Fe (aq) + SCN- (aq) → FeSCN²+ (aq) 6.00 M Fe (aq) and 10.0 M SCN (aq) are mixed at a certain temperature and at equilibrium the concentration of FeSCN2(aq) is 3 M. A) 250x10 B) 95 x10-³ C) 143x10³ D) 303 x104 of 0.013 M. What is the pOH of the solution? C) 12.3 D) 15.8 22) The OH- concentration in a 0.089M of Ca(OH)2 solution is A) 0.178 M B) 0.108 M 21) What is the pH of 42.0 M aqueous solution of NH3 (ammonia). It's Ks- 1.8 x 10¹5. A) 12.4 B) 0.0104 C) 0.778 C) 1.3x10-¹² M D) 12.6 D) 1x10-7 M 23) A solution of 9.00 MHCHO₂ is 0.77% ionized in water. Calculate the K. value for the acid (HCHO2). A) 2.3x10* B) 5.4x10* C) 0.2x10³ D) 0.23 24) When a weak acid is titrated with a strong base, the pH at the equivalence point is ALWAYS A) 7 B)<7 C)>7 D) <1 25) Which one of these statements about strong acid is true A) Strong acid produce solutions with a higher pH than weak acids B) All strong acids have H atom bonded to electronegative oxygen atom C) Strong acids are very concentrated acids D) Strong acids are 100% ionized in water

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Convert 76.9 L to cm3. O76900 cm3 O 7690 cm3 O 769000000 cm³ O769000 cm3

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A cylinder measuring 9.8 cm wide and 12. cm high is filled with gas. The piston is pushed down with a steady force measured to be 46. N. gas kPa piston cylinder Calculate the pressure of the gas inside the cylinder. Write your answer in units of kilopascals. Be sure your answer has the correct number of significant digits. x10 X Ś

The force that one object exerts on another object when they rub against each other in opposite direction and slows down an object is __.

Part C F10 BO O 3.04 × 10³ 6.27 x 10-1 The dosage of quinine when a 145-lb adult takes a 200.-mg tablet is equivalent to ug drug per kg of body weight. ► View Available Hint(s) O 627 O 1.38 × 10³ P Pearson * Education Inc. All rights reserved. | Terms of Use Privacy Policy. Permissions Contact Us | Bb Home L End Insert ■ Review |- Constants | Periodic Table 1 2