Indiana State University Strip of Magnesium Metal Chemistry Questions

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I have 7 chemistry homework problems that needs help. They are attached as photos below. Thank you! I need correct answers

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A strip of magnesium metal having a mass of 1.44 g

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Quiz: wksheet 4 Х iCloud S SOLUTION: Chemistry homework x Х QQMail File Hub - Х G Butane, C4H10, is a component o X + t c ufl.instructure.com/courses/407733/quizzes/891761/take : GatorEvals UF Question 1 0.75 pts UNIVERSITY of. FLORIDA A strip of magnesium metal having a mass of 1.44 g dissolves in 197 ml of 5.00 M HCl (specific gravity = 1.10); products of the reaction are magnesium chloride and hydrogen gas. The HCl is initially at 16°C, and the resulting solution reaches a final temperature of 57°C. The heat capacity of the calorimeter in which the reaction occurs is 333 J/°C. Calculate AH (in kJ/mol) for the reaction under the conditions of the experiment, assuming the specific heat of the final solution is the same as that for water (4.184 J/g°C). 33 Round your answer to 2 decimal places. DOO 305 ? Question 2 0.5 pts For each of the following chemical and physical changes carried out at constant pressure, state whether work is done by the system on the surroundings or by the surroundings on the system, or whether the amount of work is negligible. State whether process or reaction is endothermic or exothermic. H2O (s) +H2O (1) [ Select] [ Select] N2(g) + O2 (g) < + 2NO(g) ΔΗ : Select = 181 kJ/mol [ Select ] 个 0.5 pts Question 3 O 3:55 PM O Type here to search < ca CO ENG 9/30/2020 Quiz: wksheet 4 Х iCloud S SOLUTION: Chemistry homework x Х QQMail File Hub Х G Butane, C4H10, is a component o X + - t c ufl.instructure.com/courses/407733/quizzes/891761/take : UF Question 3 0.5 pts UNIVERSITY of FLORIDA Assuming that the gases are ideal, calculate the amount of work done on or by the system in Joules in this reaction at 75°C: CCl4(g) C(s) + 2 Cl2(g) Enter a number in Joules to O decimal places with the correct sign. 33 DOO 305 ? Question 4 1 pts A 178.6mL sample of 1.8M HNO3 is mixed with a 800mL sample of 0.5M KOH in a Styrofoam cup. If both solutions were initially at 21.5°C, and the enthalpy of the neutralization reaction is -57 kJ/mole of H2O formed, what is the final temperature of the mixture? The volume of the formed H2O can be ignored. Assume that the solution has a density of 1.00 g/mL and a specific heat of 4.184 J/gºC, and that the Styrofoam cup has an insignificant heat capacity. (enter one decimal place) Question 5 0.75 pts A system contracts from an initial volume of 20 L to a final volume of 7 L under a constant external pressure of 3.75 atm. The value of w, in J, is 个 3:55 PM O Type here to search O < ca Q») U ENG 9/30/2020 Quiz: wksheet 4 Х iCloud S SOLUTION: Chemistry homework x Х QQMail File Hub Х - G Butane, C4H10, is a component o X + t c ufl.instructure.com/courses/407733/quizzes/891761/take : D UF Question 5 0.75 pts UNIVERSITY of FLORIDA A system contracts from an initial volume of 20 L to a final volume of 7 L under a constant external pressure of 3.75 atm. The value of w, in J, is Enter a number to O decimal places. 33 DOO 305 Question 6 0.75 pts ? A 331.7-g sample of nickel at 115.0 °C is placed in 187.7 mL of water at 23.4 °C. What is the final temperature of the water? Assume that no heat is lost to or gained from the surroundings. specific heat capacity of nickel = 0.444 J/g.K specific heat capacity of water = 4.184 J/gK round your answer up to one decimal place Question 7 0.75 pts A 6.52 mol sample of benzene (C6H6, 78.11 g/mol) was burned in a bomb calorimeter with a heat capacity of 978.81 J/°C. The calorimeter contained 235.05 g of water (4.18 J/g°C), and the temperature increased by 8.73 °C. What is the molar heat of combustion of benzene in kJ/mol of benzene? 个 3:55 PM O Type here to search O < ca CO ENG 9/30/2020 Quiz: wksheet 4 Х iCloud S SOLUTION: Chemistry homework x Х QQMail File Hub - Х G Butane, C4H10, is a component o X + t c ufl.instructure.com/courses/407733/quizzes/891761/take : UF Question 6 0.75 pts UNIVERSITY of FLORIDA A 331.7-g sample of nickel at 115.0 °C is placed in 187.7 mL of water at 23.4 °C. What is the final temperature of the water? Assume that no heat is lost to or gained from the surroundings. specific heat capacity of nickel = 0.444 J/g.K specific heat capacity of water = 4.184 J/gK 33 round your answer up to one decimal place DOO 305 ? Question 7 0.75 pts A 6.52 mol sample of benzene (C6H6, 78.11 g/mol) was burned in a bomb calorimeter with a heat capacity of 978.81 J/°C. The calorimeter contained 235.05 g of water (4.18 J/g°C), and the temperature increased by 8.73 °C. What is the molar heat of combustion of benzene in kJ/mol of benzene? Enter to 2 decimal places. Quiz saved at 3:55pm Submit Quiz 个 3:55 PM O Type here to search O DC < .) Q») U ENG 9/30/2020
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Explanation & Answer

1. 857.88 kJ/mol2.H2O: (work ...


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