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10. What is subject of chemistry? 2 points Your answer 4 points 11. 60 % solution...
4.4.52 g of the oxide of element X react with excess of H2 forming 2.56 g...
4.4.52 g of the oxide of element X react with excess of H2 forming 2.56 g 8 points of pure element X and water. a) calculate mass of O in the oxide b) Calculate the quantity (mol) of H2O released in the reaction. C) What element is represented by the symbol X? d) How many liters of H2 (STP) are necessary to get 7.42 g of X from its oxide? Your answer 5. Choose the correct shape for following molecules:...
just the final answers needed 4.4.52 g of the oxide of element X react with excess...
just the final answers needed
4.4.52 g of the oxide of element X react with excess of H2 forming 2.56 g 8 points of pure element X and water. a) calculate mass of O in the oxide b) Calculate the quantity (mol) of H2O released in the reaction. C) What element is represented by the symbol X? d) How many liters of H2 (STP) are necessary to get 7.42 g of X from its oxide? Your answer 5. Choose the...
Please explain, and do step by step! 4. 10 Points. SHOW YOUR WORK CLEARLY a) USE THE FACTOR LABEL METHOD What volume...
Please explain, and do step by step!
4. 10 Points. SHOW YOUR WORK CLEARLY a) USE THE FACTOR LABEL METHOD What volume of a 0.500 M HCl solution is needed to neutralize 10.0 mL of a 0.220 M Ba(OH), solution 2 HCl(aq) + Ba(OH)2(aq) → BaCl2(aq) + 2 H2O(1) b) USE THE FACTOR LABEL METHOD An experiment calls for the addition of 0.250 g of HCl to reaction vessel. You have at your disposal a 0.250 M HCl solution. How...
2. (10 points) Your new job now requires you to make 1.5 L of a solution...
2. (10 points) Your new job now requires you to make 1.5 L of a solution that is 0.100M potassium phosphate. You find a bottle on the shelf that is 3M potassium phosphate. Describe how you would make that solution. More details = more points. 3. (12 points) Write the names of the reactants and products for the net ionic reactions for the following reactions in water, if no reaction occurs, write "no reaction and explain why. Example: NaNO, +...
help with all 6 questions please Question 24 1 pts An isotonic solution of NaCl is...
help with all 6 questions please
Question 24 1 pts An isotonic solution of NaCl is 0.90% w/v. Suppose you start with a teaspoon (5.69 g) of NaCl and dissolve it in water. How many total mL would the solution need to be to be isotonic? Give to at least two significant figures? Question 25 1 pts A soft drink has a pH of 2. What will be the concentration of Ht? Give the exact number, without the unit. I...
Question 1 (20 points) What is the normality of a solution consisting of 472.9 mg of...
Question 1 (20 points) What is the normality of a solution consisting of 472.9 mg of NaOH in 59.9 ml of solution? Your Answer: Answer units Question 2 (20 points) What is the percent H2SO4 for a solution consisting of 5.87 equivalences of H2504 mixed with 13.7 kg of water Your Answer Answer units Question 3 (20 points) What is the normality of an HCl solution if 33.89 ml is required to completely neutralize 28.21 ml of a 0.1774 N...
Q4 Solution Stoichiometry 10 Points A 25.0 ml of 0.527 M sodium sulfide(aq) and 55.0 ml...
Q4 Solution Stoichiometry 10 Points A 25.0 ml of 0.527 M sodium sulfide(aq) and 55.0 ml of 0.243 Miron (III) nitrate are mixed together. What mass of solid iron (III) sulfide can be formed? What is the limiting reagent? Show your work for full credit. 3 Na2S (aq) + 2 Fe(NO3)3 (aq) ► Fe2S3 (s) + 6 NaNO3 (aq) The limiting reagent is Enter your answer here The theoretical yield of iron sulfide is Enter your answer here Please select...
ANSWER AS SOON AS POSSIBLE 4 10 6 points Phosgene COCl2 dissociates as follows: COC12(g) <========...
ANSWER AS SOON AS POSSIBLE
4 10 6 points Phosgene COCl2 dissociates as follows: COC12(g) <======== CO (g) + Cl2(g). At 720 °C the Kc value is 3.63 X 10 -3. Find the percentage of phosgene that dissociates at this temperature when 8.88 mol of phosgene is placed in a 25.1 L vessel. Type your answer... 5 1 point Consider this reaction at equilibrium: 2H2O2(g) 2H2O(g) + O2(g); AH=-210 kJ/mol. If the volume of the system is expanded at constant...
SHORT ANSWER AND DISCUSSION. 4. Calculate the degrees of unsaturation for each of the following molecular formulas...
SHORT ANSWER AND DISCUSSION. 4. Calculate the degrees of unsaturation for each of the following molecular formulas and draw a structure is consistent. Show your work! [8 points] CHgCl2 CH, NO 5. In class, we discussed the following reactions and how they differ in their regioselectivity. Provide the product for each reaction and discuss why the regiosclectivity is observed in each case. Draw diagrams to explain your answer. [8 points). 1) BH3. THE 2) H2O2, OH H2O H2SO4
Plz answer 1. Calculate the concentration of H30" in a solution that contains 5.0 Identify the...
Plz answer
1. Calculate the concentration of H30" in a solution that contains 5.0 Identify the solution as acidic, basic, or neutral. A) 2.0x 10-5 M, basic D) 9.0x 10-1 M, acidic 10-10 M OH at 25°C B) 2.0 10-5 M, acidic E) 9.0 10-1 M. basic 2. Calculate the [H3O~] concentration in an aqueous solution with a pH of 9.85 at 25 C c)5.0x 10-10 M, neutral A) 7.1x 10-5 M B) 4.2x 10-10 M C)8.7 10-10 M E)...
4.4.52 g of the oxide of element X react with excess of H2 forming 2.56 g 8 points of pure element X and water. a) calculate mass of O in the oxide b) Calculate the quantity (mol) of H2O released in the reaction. C) What element is represented by the symbol X? d) How many liters of H2 (STP) are necessary to get 7.42 g of X from its oxide? Your answer 5. Choose the correct shape for following molecules:...
just the final answers needed
4.4.52 g of the oxide of element X react with excess of H2 forming 2.56 g 8 points of pure element X and water. a) calculate mass of O in the oxide b) Calculate the quantity (mol) of H2O released in the reaction. C) What element is represented by the symbol X? d) How many liters of H2 (STP) are necessary to get 7.42 g of X from its oxide? Your answer 5. Choose the...
Please explain, and do step by step!
4. 10 Points. SHOW YOUR WORK CLEARLY a) USE THE FACTOR LABEL METHOD What volume of a 0.500 M HCl solution is needed to neutralize 10.0 mL of a 0.220 M Ba(OH), solution 2 HCl(aq) + Ba(OH)2(aq) → BaCl2(aq) + 2 H2O(1) b) USE THE FACTOR LABEL METHOD An experiment calls for the addition of 0.250 g of HCl to reaction vessel. You have at your disposal a 0.250 M HCl solution. How...
2. (10 points) Your new job now requires you to make 1.5 L of a solution that is 0.100M potassium phosphate. You find a bottle on the shelf that is 3M potassium phosphate. Describe how you would make that solution. More details = more points. 3. (12 points) Write the names of the reactants and products for the net ionic reactions for the following reactions in water, if no reaction occurs, write "no reaction and explain why. Example: NaNO, +...
help with all 6 questions please
Question 24 1 pts An isotonic solution of NaCl is 0.90% w/v. Suppose you start with a teaspoon (5.69 g) of NaCl and dissolve it in water. How many total mL would the solution need to be to be isotonic? Give to at least two significant figures? Question 25 1 pts A soft drink has a pH of 2. What will be the concentration of Ht? Give the exact number, without the unit. I...
Question 1 (20 points) What is the normality of a solution consisting of 472.9 mg of NaOH in 59.9 ml of solution? Your Answer: Answer units Question 2 (20 points) What is the percent H2SO4 for a solution consisting of 5.87 equivalences of H2504 mixed with 13.7 kg of water Your Answer Answer units Question 3 (20 points) What is the normality of an HCl solution if 33.89 ml is required to completely neutralize 28.21 ml of a 0.1774 N...
Q4 Solution Stoichiometry 10 Points A 25.0 ml of 0.527 M sodium sulfide(aq) and 55.0 ml of 0.243 Miron (III) nitrate are mixed together. What mass of solid iron (III) sulfide can be formed? What is the limiting reagent? Show your work for full credit. 3 Na2S (aq) + 2 Fe(NO3)3 (aq) ► Fe2S3 (s) + 6 NaNO3 (aq) The limiting reagent is Enter your answer here The theoretical yield of iron sulfide is Enter your answer here Please select...
ANSWER AS SOON AS POSSIBLE
4 10 6 points Phosgene COCl2 dissociates as follows: COC12(g) <======== CO (g) + Cl2(g). At 720 °C the Kc value is 3.63 X 10 -3. Find the percentage of phosgene that dissociates at this temperature when 8.88 mol of phosgene is placed in a 25.1 L vessel. Type your answer... 5 1 point Consider this reaction at equilibrium: 2H2O2(g) 2H2O(g) + O2(g); AH=-210 kJ/mol. If the volume of the system is expanded at constant...
SHORT ANSWER AND DISCUSSION. 4. Calculate the degrees of unsaturation for each of the following molecular formulas and draw a structure is consistent. Show your work! [8 points] CHgCl2 CH, NO 5. In class, we discussed the following reactions and how they differ in their regioselectivity. Provide the product for each reaction and discuss why the regiosclectivity is observed in each case. Draw diagrams to explain your answer. [8 points). 1) BH3. THE 2) H2O2, OH H2O H2SO4
Plz answer
1. Calculate the concentration of H30" in a solution that contains 5.0 Identify the solution as acidic, basic, or neutral. A) 2.0x 10-5 M, basic D) 9.0x 10-1 M, acidic 10-10 M OH at 25°C B) 2.0 10-5 M, acidic E) 9.0 10-1 M. basic 2. Calculate the [H3O~] concentration in an aqueous solution with a pH of 9.85 at 25 C c)5.0x 10-10 M, neutral A) 7.1x 10-5 M B) 4.2x 10-10 M C)8.7 10-10 M E)...
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Question 501 pts
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