Author: Anonymous

Which of the following represents the Lewis structure for S2?

A mixture of Ar and Kr at a total pressure of 1.20 atm contains 0.30 mol of Ar and 0.70 mol of Kr. What is the partial pressure of Kr in atm?

This bonus question is worth 4 points and is set to 0 points in Canvas. If correct, I will add the points to your overall grade after review. Skipping it will not affect your Test 3 grade. Bonus 1 Use the standard enthalpy of formation (ΔH°f) values and the standard enthalpy of reaction (ΔH°rxn) given below to calculate the standard enthalpy of formation of SO₂(g). 2 SO₃(g) + 2 H₂(g) → 2 SO₂(g) + 2 H₂O(g)  ΔH°rxn = −198 kJ ΔH°f values: SO₃(g): −396 kJ/mol H₂O(g): −242 kJ/mol What is ΔH°f for SO₂(g)?

What is the predicted ionic charge for the metal in Group 1 (IA )?

Consider the following balanced reaction: 2 C2H6(g)  +  7 O2(g)  –>  4 CO2(g) + 6 H2O(g) Calculate the volume of CO2 produced when 95.0 L of O2 reacts with 25.0 L C2H6 at STP conditions. 1 mol = 22.4 L at STP

A piece of lead with a mass of 125.0 g has an initial temperature of 88.0°C. The lead is immersed in a beaker containing an unknown mass of water at 23.5°C. When they reach thermal equilibrium, the final temperature is 25.2°C. What is the mass of the water, g? (Specific heat of Pb = 0.128 J/g·°C; Specific heat of H2O = 4.184 J/g·°C)

Every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin

A 15.0 g sample of aluminum metal at 25.0°C is heated by the addition of 315 J of energy. What is the final temperature of the aluminum in °C? (Specific heat capacity of aluminum = 0.903 J/g·K)

This bonus question is worth 4 points and is set to 0 points in Canvas. If correct, I will add the points to your overall grade after review. Skipping it will not affect your Test 3 grade. Bonus 2 A 42.0 L steel tank at -15.0 °C contains ammonia gas, NH₃, at a pressure of 980 mmHg. How many grams of NH₃ are in the tank? R = 0.0821 L·atm·mol⁻¹·K⁻¹ Molar mass of NH₃ = 17.03 g/mol 1 atm = 760 mmHg

This bonus question is worth 4 points and is set to 0 points in Canvas. If correct, I will add the points to your overall grade after review. Skipping it will not affect your Test 3 grade. Bonus 1 Use the standard enthalpy of formation (ΔH°f) values and the standard enthalpy of reaction (ΔH°rxn) given below to calculate the standard enthalpy of formation of CO(g). 2 CO₂(g) + 2 H₂(g) → 2 CO(g) + 2 H₂O(g)  ΔH°rxn = +82 kJ ΔH°f values: CO₂(g): −394 kJ/mol H₂O(g): −242 kJ/mol What is ΔH°f for CO(g)?