Homework Answers
methanol is a covalent compound which remains in molecular form in solution.
NaCl is a salt and produces two ions per molecule in solution.
NaCl (aq) -----------> Na+ (aq) + Cl-(aq)
Thus in methanol solution we have 0.1 mole of methanol particles while in NaCl solution we have 2 x0.1 moles of ions (total Na+ and Cl-) .
Thus OPTION 2 IS CORRECT.
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VZW Wi-Fi 20:29 @ 4 31% E 55:32:56 Exit D 1. Which contains more solute particles:...
chm 1045c )2(aq)+ NaClag) no 4) a) The molarity of 64.7 g LiCi in 250.0 mL...
chm 1045c
)2(aq)+ NaClag) no 4) a) The molarity of 64.7 g LiCi in 250.0 mL solution is b) The volume of 18.8 M H2SO4 solution required to prepare 4.00 L of 1.50 M H2SO4 is Li 5) Which contains more solute particles: a 0.10 Maqueous solution of methanol (CH3OH) or a 0.10 Maqueous solution of salt (NaCI)? They contain the same number of solute particles. The salt solution contains twice as many particles as the methanol a. b. solution....
18. Diluting 1.0 mL of a 1.0 M solution to 1000 mL results in a solution...
18. Diluting 1.0 mL of a 1.0 M solution to 1000 mL results in a solution that is 0.001 M. Repeating this 1000-fold dilution process five more times results in a concentration of A. 1.0 x 10-8 M B. 5.0 x 10-'M C. 1.0 x 10-18 M D. 1.0 x 10-12 M E. 2.0 x 10+M 19. Which of the following statements is true regarding electrolytes and nonelectrolytes? A. Molten ionic compounds are usually considered to be weak electrolytes. B....
1 31% all VZW Wi-Fi 20:30 Exit 55:33:15 3. Calculate parts per million Br in a...
1 31% all VZW Wi-Fi 20:30 Exit 55:33:15 3. Calculate parts per million Br in a sample of seawater that is 0.865 mM Br witha density of 1.025 g/mL 69.1 ppm 70.8 ppm 67.4 ppm 94.7 ppm 79.9 ppm Submit
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
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44. Which of the following molecules central stem requires p'd hybridization? 2. SF. SO 4. NH...
44. Which of the following molecules central stem requires p'd hybridization? 2. SF. SO 4. NH d. PC Use the following information to answer questions 45-48. A solution is prepared by mixing 23.5g of NaCl with 100.0 g of H.O. Given Density of H:0 - 0.997 g/mL Density of Solution - 0.9700 g/mL (Mixture of H:0 and NECT) 45. What volume of H:0 was used in this solution? a. 99.7 ml. b. 100 mL c. 103 mL d. 97.9 ml...
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chm 1045c
)2(aq)+ NaClag) no 4) a) The molarity of 64.7 g LiCi in 250.0 mL solution is b) The volume of 18.8 M H2SO4 solution required to prepare 4.00 L of 1.50 M H2SO4 is Li 5) Which contains more solute particles: a 0.10 Maqueous solution of methanol (CH3OH) or a 0.10 Maqueous solution of salt (NaCI)? They contain the same number of solute particles. The salt solution contains twice as many particles as the methanol a. b. solution....
18. Diluting 1.0 mL of a 1.0 M solution to 1000 mL results in a solution that is 0.001 M. Repeating this 1000-fold dilution process five more times results in a concentration of A. 1.0 x 10-8 M B. 5.0 x 10-'M C. 1.0 x 10-18 M D. 1.0 x 10-12 M E. 2.0 x 10+M 19. Which of the following statements is true regarding electrolytes and nonelectrolytes? A. Molten ionic compounds are usually considered to be weak electrolytes. B....
1 31% all VZW Wi-Fi 20:30 Exit 55:33:15 3. Calculate parts per million Br in a sample of seawater that is 0.865 mM Br witha density of 1.025 g/mL 69.1 ppm 70.8 ppm 67.4 ppm 94.7 ppm 79.9 ppm Submit
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
8/30/2018 Dosage Forms Pharmaceutical calculations Anne Chapter 1 Practice Problems 1. If an insulin injection contains 100 units originemine, how many milliers should be injected to receive 40 units of insulin 2. An injection contains me of medicati in each militer (ml). If a physician prescribes dose or 0.5 mg to be administered to a hospital patient three times daily, how many of injection will be required over a 5-day period? 3. In a clinical study, a drug produced drowsiness...
44. Which of the following molecules central stem requires p'd hybridization? 2. SF. SO 4. NH d. PC Use the following information to answer questions 45-48. A solution is prepared by mixing 23.5g of NaCl with 100.0 g of H.O. Given Density of H:0 - 0.997 g/mL Density of Solution - 0.9700 g/mL (Mixture of H:0 and NECT) 45. What volume of H:0 was used in this solution? a. 99.7 ml. b. 100 mL c. 103 mL d. 97.9 ml...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
1. Which of the following is not considered a nutrient a Vitamin B. Water c.Carbohydrate (d) Alcohol e Mineral 2. For which of the following causes of death does a person's diet play a part? a. Lung disease (6) Cancer Chronic lower respiratory diseases d. Infections of the blood e AIDS 3. Researchers repeatedly report that people who consume a variety of foods such as fruits, vegetables, legumes, nuts, and whole grains have reduced risks of which of the following...
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