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In a coffee-cup calorimeter, 1.80 g of NH4NO3 is mixed with 79.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.61°C. Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A mixture of 0.140 moles C is reacted with 0.117 moles of O2 in a sealed, 10.0 L vessel at 500 K, producing a mixture of CO and CO2.
Calculate the cell potential, , for this galvanic cell and ΔG for the cell reaction at these conditions.
explain why the vitamin tablet is crushed before titrating with the iodate titrant.
Which of the following would be expected to have the lowest freezing temperature?
If atmospheric pressure suddenly changes from 1.00 atm to 0.898 atm at 298 K, how much oxygen will be released from 3.10 L of water in an unsealed container?
Calculate the change in the mass of copper at the anode or cathode if the charge calculated above is passed through the cell described. Enter your answer as a positive quantity in mg. Mass change at the electrode = ? mg
Use the appendices in your textbook to estimate the normal boiling point of water at 1 atm. Compare the temperature obtained with the known boiling point of water. Can you explain the discrepancy. At what temperature does water boil
A 38.8 L volume of methane gas is heated from 25°C to 72°C at constant pressure. What is the final volume of the gas
Given the following at 25°C and 1.00 atm: 1/2N2(g) + O2(g) ® NO2(g)DH0 = 33.2 kJ N2(g) + 2O2(g) ® N2O4(g)DH0 = 11.1 kJ Calculate the DH0 for the reaction below at 25°C. 2NO2(g) ® N2O4(g)
How many grams of Fe2O3(s) are produced from 500.0 g of FeS2(s) and 400.0 g of oxygen gas?
Explain why bromination of cyclohexene produce trans 1,2-dibromocyclohexane
Even with a drying tube, leaving phenylmagnesium bromide exposed to air will eventually lead to its decomposition. Why? What is the product of this decomposition pathway?
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