Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Q 18 please

Q 18 please

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question
Q 18 please
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 4 C) 6.43 torr D) 2.48 torr 12) The rate constant for the first order reaction A--> B+C is k-4.4 x 103 min¹ at 57 K. What is the half-life for this reaction at 57 K? A) 32 min C) 9.1 min. D) 1200 min 13) Consider the following reaction: If the half-life for the reaction is 0.610 s, the rate constant is: 2 N₂O(g) 2 NO(g) + O2(g); rate = k[N20] A) 1.14 s¹¹ B) 0.69 ¹ C) 0.86 s¹ B) 16 min. D) 0.32 s¹ 14) The decomposition of N₂Os(g)-NO2(g) + NO(g) proceeds as a first order reaction with a half-life of 30.0 seconds at a certain temperature. If the initial concentration [N2Oslo 0.600 M, what is the concentration after 120 seconds? A) 0.038 M 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] =([N₂Oslo)/t12 B) [N₂0s]-[N₂O3]oek C) [N₂O₁]=kt D) 1/[N2Os] = 1/[N2Os]o + kt 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 PCI(g)-> P4(g) + 6 Cl₂(g) If the initial concentration of PCI3(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)* C) Ke=x²/(2.0-x)* 18) Consider the reaction represented by the equation: N₂(g) + 3H2(g) <-> 2NH3(g) Calculate the D) Kc = (x)(6x)/(2.0-4x)" equilibrium pressures at a certain temperature: PNH₁-2.9 x 10 atm, PN2-89x10¹ atm, PH2-2.7x 10 atm A) 4.9 x10 B) 2.9x10 D) 7.8x104 C) 6.3x104 55 19) Consider the reaction represented by the equation: Fe" (aq) + SCN (aq) → FeSCN²+ (aq) 6.00 M Fe³+ (aq) and 10.0 M SCN (aq) are mixed at a certain temperature and at equilibrium the concentration of FeSCN³+ (aq) is 3 M. A) 250x10¹ B) 95 x103 20) A particular vinegar solution has a H3O* concentration A) 17.3 B) 12.1 C) 143x103 D) 303 x10 of 0.013 M. What is the pOH of the solution? D) 15.8 C) 12.3 21) What is the pH of 42.0 M aqueous solution of NH3 (ammonia). It's Ks- 1.8 x 10³. A) 12.4 B) 0.0104 C) 0.778 22) The OH concentration in a 0.089M of Ca(OH)2 solution is A) 0.178 M B) 0.108 M D) 1x 10-7 M 23) A solution of 9.00 MHCHO2 is 0.77% ionized in water. Calculate the K. value for the acid (HCHO₂). A) 2.3x104 B) 5.4x104 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 C) 1.3x10-¹2 M D) 12.6 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
Transcribed Image Text: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 4 C) 6.43 torr D) 2.48 torr 12) The rate constant for the first order reaction A--> B+C is k-4.4 x 103 min¹ at 57 K. What is the half-life for this reaction at 57 K? A) 32 min C) 9.1 min. D) 1200 min 13) Consider the following reaction: If the half-life for the reaction is 0.610 s, the rate constant is: 2 N₂O(g) 2 NO(g) + O2(g); rate = k[N20] A) 1.14 s¹¹ B) 0.69 ¹ C) 0.86 s¹ B) 16 min. D) 0.32 s¹ 14) The decomposition of N₂Os(g)-NO2(g) + NO(g) proceeds as a first order reaction with a half-life of 30.0 seconds at a certain temperature. If the initial concentration [N2Oslo 0.600 M, what is the concentration after 120 seconds? A) 0.038 M 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] =([N₂Oslo)/t12 B) [N₂0s]-[N₂O3]oek C) [N₂O₁]=kt D) 1/[N2Os] = 1/[N2Os]o + kt 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 PCI(g)-> P4(g) + 6 Cl₂(g) If the initial concentration of PCI3(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)* C) Ke=x²/(2.0-x)* 18) Consider the reaction represented by the equation: N₂(g) + 3H2(g) <-> 2NH3(g) Calculate the D) Kc = (x)(6x)/(2.0-4x)" equilibrium pressures at a certain temperature: PNH₁-2.9 x 10 atm, PN2-89x10¹ atm, PH2-2.7x 10 atm A) 4.9 x10 B) 2.9x10 D) 7.8x104 C) 6.3x104 55 19) Consider the reaction represented by the equation: Fe" (aq) + SCN (aq) → FeSCN²+ (aq) 6.00 M Fe³+ (aq) and 10.0 M SCN (aq) are mixed at a certain temperature and at equilibrium the concentration of FeSCN³+ (aq) is 3 M. A) 250x10¹ B) 95 x103 20) A particular vinegar solution has a H3O* concentration A) 17.3 B) 12.1 C) 143x103 D) 303 x10 of 0.013 M. What is the pOH of the solution? D) 15.8 C) 12.3 21) What is the pH of 42.0 M aqueous solution of NH3 (ammonia). It's Ks- 1.8 x 10³. A) 12.4 B) 0.0104 C) 0.778 22) The OH concentration in a 0.089M of Ca(OH)2 solution is A) 0.178 M B) 0.108 M D) 1x 10-7 M 23) A solution of 9.00 MHCHO2 is 0.77% ionized in water. Calculate the K. value for the acid (HCHO₂). A) 2.3x104 B) 5.4x104 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 C) 1.3x10-¹2 M D) 12.6 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
Expert Solution
Step 1

Chemistry homework question answer, step 1, image 1

steps

Step by step

Solved in 3 steps with 3 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Measurement
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS