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CHM 110 Page 4 of 6 Homework II Fall 2019 7. Eleanora takes 125...
CHM 110 Version B Page 1 Exam 2 Fall 2019 16. Jurgen did the chemical analysis...
CHM 110 Version B Page 1 Exam 2 Fall 2019 16. Jurgen did the chemical analysis to find that the composition of a compound was magnesium, 60.31 %, and oxygen, 39.69 %. The molecular formula was 40.304 g/mol. a. (8 pt) Determine its empirical formula. b. (5 pt) Determine its molecular formula 17. Anna exhaled air containing CO2 at a pressure of 27.0 torr. The capacity of a human lung is about 3.00 L. Body temperature is 36.5°C. a) (5...
M 110 Exam 2 Fall 2019 Version B Page 3 of 7 7. Ahmed learned that...
M 110 Exam 2 Fall 2019 Version B Page 3 of 7 7. Ahmed learned that the physical properties of gases depend on only four variables. Which of the following is NOT among these four variables for gases? a. Pressure b. Volume c. Number of moles d. Molar mass e. Kelvin temperature Answer: When Wenjing breathe in, the rib muscles and diaphragm contract to expand the lung volume, which decreases the pressure in the lung and the air is drawn...
questions 2-8 Cuso. AI (SO.), + Cu Al + Type 2. Iron metal can be produced from the mineral hematite (Feo) by reacti...
questions 2-8
Cuso. AI (SO.), + Cu Al + Type 2. Iron metal can be produced from the mineral hematite (Feo) by reaction with carbon: 2 Fe,0, + 3 à 4 Fe + 300, (a) How many moles of carbon are needed to react with 7 moles of hematite? (b) How many grams of iron are formed when sufficient carbon reacts with 525 g of hematite? 3. What effect does an increase in the temperature of a gas have on...
7. How many milligrams of iron metal must react with excess HCl to produce 46.0 ml...
7. How many milligrams of iron metal must react with excess HCl to produce 46.0 ml of H2(g), measured at 55°C and 745 torr? 2F + 6HCl → 2FeCl(aq) + 3H 8. If all the gas in a neon tank is used to fill 2500 balloons with a volume of 2.5L, what is the mass of neon in the tank? 9. A study of the effects of certain gases on plant growth requires a synthetic atmosphere composed of 2.0g CO2,...
6. Commercial drain cleaners sometimes contain a mixture of aluminum powder and NaOH. When the mix...
6. Commercial drain cleaners sometimes contain a mixture of aluminum powder and NaOH. When the mix is poured down a clogged drain, the following occurs: 2NaAl(OH)4(aq) + 3H2(g) + Heat 2 NaOH(aq) + 2AI(s) + 6H2O() Heat melts grease and gas breaks up the clogs. What volume of hydrogen is formed at 1.00 atm and 21.0°C when 5.00 g of Al are treated with excess NaOH? 7. The mass percent of HCO3 in a certain 3.20 g Alka Seltzer tablet...
6. Given the reaction below, answer the following questions. (30 pts) CH4(g) + S(g) → CS2...
6. Given the reaction below, answer the following questions. (30 pts) CH4(g) + S(g) → CS2 (g) + H2S(g) A.Balance the equation above. B.Is the sulfur oxidized or reduced in the reaction? C.Given 3.841x1025 molecules of CH4, how many moles is this? Show charges D.Given 25.15 grams of Sulfur gas, how many moles of H2S could be formed? E.How many liters would the moles of H2S gas(from Part D) occupy at 25.0°C and 1.25 atm? F.What would be the volume(L)...
Name: Section: Gas Law Practice (IC-6) 1. At what temperature will 5.00 g of Cl, exert...
Name: Section: Gas Law Practice (IC-6) 1. At what temperature will 5.00 g of Cl, exert a pressure of 900. torrat a volume of 750 ml? 2. What pressure will be exerted by 25 g of CO, at a temperature of 25 "C and a volume of 500 mL? 3. Find the number of grams of CO, that exert a pressure of 785 torrs at a volume of 32.5 L and a temperature of 32°C 4. An elemental gas has...
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of...
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of the following features: (a) density; (b) the space between the molecules; (c) the attractive force between the molecules? 2. Convert each pressure unit to the indicated unit. a. 3.0 atm to mm Hg b. 720 mm Hg to psi c. 424 mm Hg to atm 3. A sample of nitrogen gas has a volume of 15.0 mL at a pressure of 0.50 atm. What...
Please help with all four questions. ? 3.5) Question 7 The pH of a solution of...
Please help with all four questions. ?
3.5) Question 7 The pH of a solution of barium hydroxide is 12.53. How many milliliters of this solution are needed to titrate 125 mL of a solution of 0.0200 M sulfuric acid ? 148 ml 165 mL 73.8 ml 36.9 ml 7.38 x 10 ml Question 8 1.5 p 100-mL of 1.0 M Sr(OH)2 is added to 100 mL of 1.0 M HCl, the pH of the mixture would be - equal...
CHM 1210 Final practice Name: Know electrolyte table, 5 solubility rules; 26 polyatomics (name/formula) Write 7...
CHM 1210 Final practice Name: Know electrolyte table, 5 solubility rules; 26 polyatomics (name/formula) Write 7 naturally occurring diatomic molecules (name; formula, phase , charge) Write rite out strong acids and weak acids by name; formula, phase ,charge Write out the molecular, complete, and net-ionic equations for the following reactions The mixing of Cobalt(IlI) chloride and silver nitrate The mixing of acetic acid and sodium hydroxide The mixing of hydrochloric acid and cakcium hydroxide The mixing of barium chloride and...
CHM 110 Version B Page 1 Exam 2 Fall 2019 16. Jurgen did the chemical analysis to find that the composition of a compound was magnesium, 60.31 %, and oxygen, 39.69 %. The molecular formula was 40.304 g/mol. a. (8 pt) Determine its empirical formula. b. (5 pt) Determine its molecular formula 17. Anna exhaled air containing CO2 at a pressure of 27.0 torr. The capacity of a human lung is about 3.00 L. Body temperature is 36.5°C. a) (5...
M 110 Exam 2 Fall 2019 Version B Page 3 of 7 7. Ahmed learned that the physical properties of gases depend on only four variables. Which of the following is NOT among these four variables for gases? a. Pressure b. Volume c. Number of moles d. Molar mass e. Kelvin temperature Answer: When Wenjing breathe in, the rib muscles and diaphragm contract to expand the lung volume, which decreases the pressure in the lung and the air is drawn...
questions 2-8
Cuso. AI (SO.), + Cu Al + Type 2. Iron metal can be produced from the mineral hematite (Feo) by reaction with carbon: 2 Fe,0, + 3 à 4 Fe + 300, (a) How many moles of carbon are needed to react with 7 moles of hematite? (b) How many grams of iron are formed when sufficient carbon reacts with 525 g of hematite? 3. What effect does an increase in the temperature of a gas have on...
7. How many milligrams of iron metal must react with excess HCl to produce 46.0 ml of H2(g), measured at 55°C and 745 torr? 2F + 6HCl → 2FeCl(aq) + 3H 8. If all the gas in a neon tank is used to fill 2500 balloons with a volume of 2.5L, what is the mass of neon in the tank? 9. A study of the effects of certain gases on plant growth requires a synthetic atmosphere composed of 2.0g CO2,...
6. Commercial drain cleaners sometimes contain a mixture of aluminum powder and NaOH. When the mix is poured down a clogged drain, the following occurs: 2NaAl(OH)4(aq) + 3H2(g) + Heat 2 NaOH(aq) + 2AI(s) + 6H2O() Heat melts grease and gas breaks up the clogs. What volume of hydrogen is formed at 1.00 atm and 21.0°C when 5.00 g of Al are treated with excess NaOH? 7. The mass percent of HCO3 in a certain 3.20 g Alka Seltzer tablet...
6. Given the reaction below, answer the following questions. (30 pts) CH4(g) + S(g) → CS2 (g) + H2S(g) A.Balance the equation above. B.Is the sulfur oxidized or reduced in the reaction? C.Given 3.841x1025 molecules of CH4, how many moles is this? Show charges D.Given 25.15 grams of Sulfur gas, how many moles of H2S could be formed? E.How many liters would the moles of H2S gas(from Part D) occupy at 25.0°C and 1.25 atm? F.What would be the volume(L)...
Name: Section: Gas Law Practice (IC-6) 1. At what temperature will 5.00 g of Cl, exert a pressure of 900. torrat a volume of 750 ml? 2. What pressure will be exerted by 25 g of CO, at a temperature of 25 "C and a volume of 500 mL? 3. Find the number of grams of CO, that exert a pressure of 785 torrs at a volume of 32.5 L and a temperature of 32°C 4. An elemental gas has...
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of the following features: (a) density; (b) the space between the molecules; (c) the attractive force between the molecules? 2. Convert each pressure unit to the indicated unit. a. 3.0 atm to mm Hg b. 720 mm Hg to psi c. 424 mm Hg to atm 3. A sample of nitrogen gas has a volume of 15.0 mL at a pressure of 0.50 atm. What...
Please help with all four questions. ?
3.5) Question 7 The pH of a solution of barium hydroxide is 12.53. How many milliliters of this solution are needed to titrate 125 mL of a solution of 0.0200 M sulfuric acid ? 148 ml 165 mL 73.8 ml 36.9 ml 7.38 x 10 ml Question 8 1.5 p 100-mL of 1.0 M Sr(OH)2 is added to 100 mL of 1.0 M HCl, the pH of the mixture would be - equal...
CHM 1210 Final practice Name: Know electrolyte table, 5 solubility rules; 26 polyatomics (name/formula) Write 7 naturally occurring diatomic molecules (name; formula, phase , charge) Write rite out strong acids and weak acids by name; formula, phase ,charge Write out the molecular, complete, and net-ionic equations for the following reactions The mixing of Cobalt(IlI) chloride and silver nitrate The mixing of acetic acid and sodium hydroxide The mixing of hydrochloric acid and cakcium hydroxide The mixing of barium chloride and...
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