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A 7 08 g sample of elemental sulfur is dissolved in 75.0 g of CS_2 create...
1.) A 0.700 g sample of a nonvolatile yellow crystalline solid is dissolved in 16.3 g...
1.) A 0.700 g sample of a nonvolatile yellow crystalline solid is dissolved in 16.3 g of benzene, producing a solution that freezes at 5.10oC. Find the molar mass of the yellow solid in g/mol. 2.) What is the osmotic pressure in atm of a 0.130 M solution of NaCl at 0oC? 3.) Calculate the freezing point for a 1.55 m solution of CCl4 in benzene.
Question 7 (2 points) A 2.070-g sample of a monoprotic acid was dissolved in water. It...
Question 7 (2 points) A 2.070-g sample of a monoprotic acid was dissolved in water. It took 16.35 mL of a 0.4159 M NaOH to neutralize the acid. Calculate the molar mass of the acid. Provide your answer to two places after the decimal. No points for units. Your Answer: Answer units Hide hint for Question 7 The reaction stoichiometry between the monoprotic acid and NaOH is 1:1.
An unknown sample weighs 0.2436 g was dissolved in 20.0 mL of cyclohexane (density = 0.779...
An unknown sample weighs 0.2436 g was dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL). The freezing point depression (∆Tf) was 2.5°C. Calculate the molar mass of the unknown substance. (Kf = 20.5 °C/m) ∆Tf = Kf m where Kf is the freezing point depression constant and m is molality. 526 g/mol 1.50 g/mol 128 g/mol 2.44 g/mol
5. A 0.565-8 sample of cobalt metal reacted with excess sulfur powder to give 1.027 g of cobalt sulfide
5. A 0.565-8 sample of cobalt metal reacted with excess sulfur powder to give 1.027 g of cobalt sulfide Calculate the empirical formula of the product. 6. A 0.750-g sample of tin foil was heated in air and reacted with oxygen gas to give 0.953 g of tin oxide. Calculate the empirical formula of the product. 7. (optional) A 1.000-g sample of red phosphorus powder was burned in air and reacted with oxygen gas to give 2.291 g of phosphorus oxide. Calculate...
Question 3 [20 points 1. Copper sulfide is produced when copper and sulfur are heated together Use the data below, obtained after the heating process, to determine the empirical formula of this co...
Question 3 [20 points 1. Copper sulfide is produced when copper and sulfur are heated together Use the data below, obtained after the heating process, to determine the empirical formula of this compound. Molar masses (e/mol) c S 32.06. 18 points) befor 1 Mass of crucible cover copper (B) 2 Mass of crucible + cover (g) 3 Mass of copper (B) 4 Mass of crucible cover + copper sulfide at constant weight (8)40.23 S Mass of copper sulfide (8) 6...
1 2 points A 52.2 g sample of NaOH is dissolved in water and the solution...
1 2 points A 52.2 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 4.36 liters. Calculate the molarity of the solution. Use 40.0 as the molar mass for NaOH. Type your answer. Previous
44 2 points A 443 g sample of NaOH is dissolved in water and the solution...
44 2 points A 443 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 2.01 liters. Calculate the molarity of the solution. Use 400 as the molar mass for NaOH Type your answer. Previous
35) What is the mass of a 0.150 mole sample of sulfur? A) 4.68 g B) 0.208 g C) 5.17 g E) 4.81 g D) 214 g 36) Lithiu...
35) What is the mass of a 0.150 mole sample of sulfur? A) 4.68 g B) 0.208 g C) 5.17 g E) 4.81 g D) 214 g 36) Lithium oxide can be produced by the reaction shown below. If a manufacturing company wants to make 25.0 g of Li20, what mass of Li is necessary? [Molar masses: Li, 6.94 g/mol; 0, 16.00 g/mol] 4Li(s) + O2(8) 2Li2O(S) A) 0.0861 g Li B) 2.903 g Li C) 23.2 g Li D)...
1. A l64-g sample of HF is dissolved in water to give 2.0 x 10' ml...
1. A l64-g sample of HF is dissolved in water to give 2.0 x 10' ml of solution. The concentration of solution is: A) 0.82 M B) 0.16 M C) 0.08 M D) 4.1 M E) 8.2 M 2. You have 75.0 mL of a 2.50 M solution of Na,CrO(ag). You also have 125 mL of a 2.01 M solution of AgNOs(ag), Calculate the concentration of Cro. after the two solutions are mixed together. A) 0.00 M B) 0.309 M...
1. A 0.750-g sample of tin metal reacts with 0.201 g of oxygen gas to form tin oxide.
1. A 0.750-g sample of tin metal reacts with 0.201 g of oxygen gas to form tin oxide. Calculate the empirical formula of the tin oxide. 2. A 0.565-g sample of cobalt metal reacts with excess sulfur to give 1.027 g of cobalt sulfide. Calculate the empirical formula of the product. 3. A 1.164-g sample of iron filings reacts with chlorine gas to give 3.384 g of iron chloride. Calculate the empirical formula of the product? 4. A 0.626-8 sample of copper oxide...
Question 7 (2 points) A 2.070-g sample of a monoprotic acid was dissolved in water. It took 16.35 mL of a 0.4159 M NaOH to neutralize the acid. Calculate the molar mass of the acid. Provide your answer to two places after the decimal. No points for units. Your Answer: Answer units Hide hint for Question 7 The reaction stoichiometry between the monoprotic acid and NaOH is 1:1.
Question 3 [20 points 1. Copper sulfide is produced when copper and sulfur are heated together Use the data below, obtained after the heating process, to determine the empirical formula of this compound. Molar masses (e/mol) c S 32.06. 18 points) befor 1 Mass of crucible cover copper (B) 2 Mass of crucible + cover (g) 3 Mass of copper (B) 4 Mass of crucible cover + copper sulfide at constant weight (8)40.23 S Mass of copper sulfide (8) 6...
1 2 points A 52.2 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 4.36 liters. Calculate the molarity of the solution. Use 40.0 as the molar mass for NaOH. Type your answer. Previous
44 2 points A 443 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 2.01 liters. Calculate the molarity of the solution. Use 400 as the molar mass for NaOH Type your answer. Previous
35) What is the mass of a 0.150 mole sample of sulfur? A) 4.68 g B) 0.208 g C) 5.17 g E) 4.81 g D) 214 g 36) Lithium oxide can be produced by the reaction shown below. If a manufacturing company wants to make 25.0 g of Li20, what mass of Li is necessary? [Molar masses: Li, 6.94 g/mol; 0, 16.00 g/mol] 4Li(s) + O2(8) 2Li2O(S) A) 0.0861 g Li B) 2.903 g Li C) 23.2 g Li D)...
1. A l64-g sample of HF is dissolved in water to give 2.0 x 10' ml of solution. The concentration of solution is: A) 0.82 M B) 0.16 M C) 0.08 M D) 4.1 M E) 8.2 M 2. You have 75.0 mL of a 2.50 M solution of Na,CrO(ag). You also have 125 mL of a 2.01 M solution of AgNOs(ag), Calculate the concentration of Cro. after the two solutions are mixed together. A) 0.00 M B) 0.309 M...
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