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Need answers 8-11
QUESTION 8 1 points Save Ans At 1.0 atm, an unknown pure gas...
Need 9-11 answered PLEASE ANSWER ALL QUESTION 9 1 points Save Answer Aluminum metal shavings (10.0...
Need 9-11 answered
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QUESTION 9 1 points Save Answer Aluminum metal shavings (10.0 g) are placed in 100 mL of 6.00 M hydrochloric acid. At STP, what is the maximum volume of hydrogen which can be produced ? 2 Al (5) + 6 HCl(aq) → 2 AlCl3 (aq) + 3 H2(g) O a. 2.241 6.6.72L O C. 1.34 L O d. 4.48 L QUESTION 10 1 points Save Answer For a set amount of gas at constant...
Need answers 13-16 QUESTION 13 1 points Save For a set amount of gas at constant...
Need answers 13-16
QUESTION 13 1 points Save For a set amount of gas at constant pressure, T1 = 35.9° C becomes T2 = 157.3°C With V1 = 87.2 ml, what is V2? O a. 121 mL 6.62.6 mL O C. 1.051 O d. 382 L QUESTION 14 1 points Save A What is the density of O2 gas at 37.0°C and 2.30 atm? a. 1.83 g/L 6.270.g/L O C 0.0195 g/l od. 2.89 g/L QUESTION 15 1 points Save...
QUESTION 3 0.5 points Save Answer If nitrogen gas has a density of 1.14 g/L, and...
QUESTION 3 0.5 points Save Answer If nitrogen gas has a density of 1.14 g/L, and an unknown gas has a density of 5.67 g/L at the same temp and pressure, what is the ratio of the rate of effusion of the known gas to the rate of effusion of nitrogen? rate effusion unknown - 2 rate effusion N2 QUESTION 4 0.5 points Save Answer The combustion reaction for octane burning in oxygen is: 2 C8H18 (1) + 25 O2(g)...
0.5 points QUESTION 3 Save Answer Zinc reacts with aqueous sulfuric acid to form hydrogen gas:...
0.5 points QUESTION 3 Save Answer Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s)H2SO4 (aq)ZnSO4 (aq) + H2 (g) In an experiment, 225 mL of wet Hp is collected over water at 27 °C with a total pressure of the water-hydrogen mixture of 748 torr. The vapor pressure of water at 27 °C is 26.74 torr How many grams of Zn have been consumed? 431 O 0.567 4.31 x 105 O567 4.79 x 106 0.5 points...
QUESTION 1 0.5 points Save Answer A 567.6 mL sample of carbon dioxide gas, CO2, is...
QUESTION 1 0.5 points Save Answer A 567.6 mL sample of carbon dioxide gas, CO2, is collected at 1.41 atm and 22.3 °C. What is the mass of the carbon dioxide? QUESTION 2 0.5 points Save Answer What will be the pressure of 27.8 grams of oxygen gas in a glass container with a volume of 5 L at 28.8 °C? QUESTION 3 0.5 points Save Answer Consider the reaction between hydrogen gas and oxygen gas to form water: 2...
chemistry. really need help QUESTION 3 4.(9 points) Consider 0.333 mL of an ideal gas initially...
chemistry. really need help
QUESTION 3 4.(9 points) Consider 0.333 mL of an ideal gas initially at 44.00 °C in a sealed container. What is the final volume after the gas is heated to 100.00 °C at constant pressure? Report your answer in mL with three decimal places. QUESTION 4 7.(7 points) What is the total pressure of a gas mixture composed of 0.622 atm He gas, 844 torr Ne gas and 378 mmHg Ar gas? Report your answer in...
QUESTION 1 0.5 points Save Answer A mixture of He, Ne and Ar has a pressure of 7.85 atm. If the Ne has a mole fraction...
QUESTION 1 0.5 points Save Answer A mixture of He, Ne and Ar has a pressure of 7.85 atm. If the Ne has a mole fraction of 0.47 and Ar has a mole fraction of 0.23, what is the pressure of He? 5.5 atm 4.2 atm O 3.7 atm 2.4 atm 1.8 atm QUESTION 2 0.5 points Save Answer A vessel contains a mixture of 30.3 grams of H2 (g) and 13.6 grams of CH4. If the total pressure inside...
Question Completion Status: QUESTION 6 1 points Save Anower The heat energy lost by an exothermic...
Question Completion Status: QUESTION 6 1 points Save Anower The heat energy lost by an exothermic reaction is characterized as a negative change of enthalpy of the reaction (Arr. Heat energy is measured in joules while the closely related change in enthalpy is measured in kilojoules/mole accounting for the amount of heat produced by each molecule. If 485) of heat (a) is produced by a gven reaction of 0.032 moles of a given reactant, what is the molar enthalpy change...
show work please 5. (2 points) Calcium carbide reacts with water to produce an unknown gas...
show work please
5. (2 points) Calcium carbide reacts with water to produce an unknown gas and calcium hydroxide. Suppose a 12.8 g sample of CaC2 in excess water produces 5.21 grams of gas in an evacuated 5.00 L glass bulb, with a pressure of 0.988 atm at 27 °C. What is the molar mass of the unknown gas? CaC2(s) + H20 (1) Ca(OH)2 (aq) + unknown gas a. 26.0 g/mol b. 64.1 g/mol c. 34.5 g/mol d. None of...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as shown below: HXiaq) + NaOH(ac) + NaCN aql + H200). Suppose you carried out this reaction in a coffee cup calorimeter using 50.0 mL of 0.500 M HX and 0.500 mL of 0.500 M NAOH If the temperature of the calorimeter increases by 1.4°C, what is the enthalpy of this neutralization reaction (in kJ/mol? Assume the density of the solution is 1.00g/mL and that...
Need 9-11 answered
PLEASE ANSWER ALL
QUESTION 9 1 points Save Answer Aluminum metal shavings (10.0 g) are placed in 100 mL of 6.00 M hydrochloric acid. At STP, what is the maximum volume of hydrogen which can be produced ? 2 Al (5) + 6 HCl(aq) → 2 AlCl3 (aq) + 3 H2(g) O a. 2.241 6.6.72L O C. 1.34 L O d. 4.48 L QUESTION 10 1 points Save Answer For a set amount of gas at constant...
Need answers 13-16
QUESTION 13 1 points Save For a set amount of gas at constant pressure, T1 = 35.9° C becomes T2 = 157.3°C With V1 = 87.2 ml, what is V2? O a. 121 mL 6.62.6 mL O C. 1.051 O d. 382 L QUESTION 14 1 points Save A What is the density of O2 gas at 37.0°C and 2.30 atm? a. 1.83 g/L 6.270.g/L O C 0.0195 g/l od. 2.89 g/L QUESTION 15 1 points Save...
QUESTION 3 0.5 points Save Answer If nitrogen gas has a density of 1.14 g/L, and an unknown gas has a density of 5.67 g/L at the same temp and pressure, what is the ratio of the rate of effusion of the known gas to the rate of effusion of nitrogen? rate effusion unknown - 2 rate effusion N2 QUESTION 4 0.5 points Save Answer The combustion reaction for octane burning in oxygen is: 2 C8H18 (1) + 25 O2(g)...
0.5 points QUESTION 3 Save Answer Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s)H2SO4 (aq)ZnSO4 (aq) + H2 (g) In an experiment, 225 mL of wet Hp is collected over water at 27 °C with a total pressure of the water-hydrogen mixture of 748 torr. The vapor pressure of water at 27 °C is 26.74 torr How many grams of Zn have been consumed? 431 O 0.567 4.31 x 105 O567 4.79 x 106 0.5 points...
QUESTION 1 0.5 points Save Answer A 567.6 mL sample of carbon dioxide gas, CO2, is collected at 1.41 atm and 22.3 °C. What is the mass of the carbon dioxide? QUESTION 2 0.5 points Save Answer What will be the pressure of 27.8 grams of oxygen gas in a glass container with a volume of 5 L at 28.8 °C? QUESTION 3 0.5 points Save Answer Consider the reaction between hydrogen gas and oxygen gas to form water: 2...
chemistry. really need help
QUESTION 3 4.(9 points) Consider 0.333 mL of an ideal gas initially at 44.00 °C in a sealed container. What is the final volume after the gas is heated to 100.00 °C at constant pressure? Report your answer in mL with three decimal places. QUESTION 4 7.(7 points) What is the total pressure of a gas mixture composed of 0.622 atm He gas, 844 torr Ne gas and 378 mmHg Ar gas? Report your answer in...
QUESTION 1 0.5 points Save Answer A mixture of He, Ne and Ar has a pressure of 7.85 atm. If the Ne has a mole fraction of 0.47 and Ar has a mole fraction of 0.23, what is the pressure of He? 5.5 atm 4.2 atm O 3.7 atm 2.4 atm 1.8 atm QUESTION 2 0.5 points Save Answer A vessel contains a mixture of 30.3 grams of H2 (g) and 13.6 grams of CH4. If the total pressure inside...
Question Completion Status: QUESTION 6 1 points Save Anower The heat energy lost by an exothermic reaction is characterized as a negative change of enthalpy of the reaction (Arr. Heat energy is measured in joules while the closely related change in enthalpy is measured in kilojoules/mole accounting for the amount of heat produced by each molecule. If 485) of heat (a) is produced by a gven reaction of 0.032 moles of a given reactant, what is the molar enthalpy change...
show work please
5. (2 points) Calcium carbide reacts with water to produce an unknown gas and calcium hydroxide. Suppose a 12.8 g sample of CaC2 in excess water produces 5.21 grams of gas in an evacuated 5.00 L glass bulb, with a pressure of 0.988 atm at 27 °C. What is the molar mass of the unknown gas? CaC2(s) + H20 (1) Ca(OH)2 (aq) + unknown gas a. 26.0 g/mol b. 64.1 g/mol c. 34.5 g/mol d. None of...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as shown below: HXiaq) + NaOH(ac) + NaCN aql + H200). Suppose you carried out this reaction in a coffee cup calorimeter using 50.0 mL of 0.500 M HX and 0.500 mL of 0.500 M NAOH If the temperature of the calorimeter increases by 1.4°C, what is the enthalpy of this neutralization reaction (in kJ/mol? Assume the density of the solution is 1.00g/mL and that...
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