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At high temperature, ammonia reduces copper(II) oxide to the free metal: Step 1: 2NH3(g) + 6CuO(s) => N2(g) + 3Cu2O(s) + 3H2O(g) Step 2: 2NH3(g) + 3Cu2O(s) => N2(g) + 6Cu(s) + 3H2O(g). calculate the heat of reaction for Step 2. a. 127.9 kJ b. -27.3 kJ c. 27.3 kJ d. -127.9 kJ e. None of these
A gas cylinder containing 6.38 mol of neon has pressure of 491mmHg at 295k. If 3.22 mol helium is added at constant temp and pressure, what will be the pressure in the cylinder
Calculate the free energy change for the following reaction and predict whether the reaction occurs spontaneously at 25 degrees celcius. H2(g)+CO2(g)-->H20(g)+CO(g); ?H=41.8 kJ, ?S=42.1 J/K
What exactly is the reduction of alkynes? I just understand that it is a method for synthesizing alkenes. Why are the leaving groups for E2 reactions not as good as E1 reactions?
Acidic and basic solutions have distinct physical and chemical properties. For chemistry courses, especially those with a laboratory component, it is important that you be able to distinguish these properties
What role does ammonium bromide play in the conversion of the trans-substituted aziridine to the diazabicyclo
Calculate pFe2 at each of the following points in the titration of 25.00 mL of 0.02075 M Fe2 by 0.03616 M EDTA at a 6.00 pH:11.50 mL,
oleci acid has following compostions : 76.54%C, 12.13%H, 11.33% O. If the experimental molar mass is 282.g/mol, what is the molecular formula of oleic acid?
sodium hydroxide to make sodium phosphate and water. How many L of the H3PO4 solution will react with 0.281 L of the NaOH solution? Give your answer to 3 decimal places.
Based on the force vs atomic spacing and energy vs atomic distance curves explain why some materials have high strength and high melting temperatures
The chloride in the sample was precipitated by the addition of 47.8 mL of a silver nitrate solution. What is the concentration of the silver nitrate solution?
The acid-dissociation constant for hypochlorous acid (HClO) is 3.0 X 10-8 . Calculate the concentrations of H3O+, ClO-, and HClO at equilibrium if the initial concentration of HClO is 0.0090 M.
If the propane and air streams enter the chamber at 25.0°C and 1.20 atm (absolute), and the products leave the chamber at 290.0°C and 2.90 atm (absolute), what is the volumetric flow rate of product gas from the chamber
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