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The contents of a gas cylinder are found to contain 25.0 mol% CO2, 50.0% O2, and 25.0% N2 at a pressure of 740 mm Hg and 25°C. a. What is the partial pressure of each of the components? b. If the temperature is raised to 45°C, will the partial pressures change? If so, what will they be?
Mixed Aldol Each of the following compounds can be prepared by a mixed aldol condensation reaction. Give the structure of the aldehyde and/or ketone precursors for each aldol product and formulate the reaction.
Draw a structural representation to describe the H-bonding responsible for the high boiling point of ethylamine and the structural representation of the H-bonding present when ethylamine dissolves in water.
Write the equation(s) that describe the synthesis of (NH4)2PbCl6 starting from Pb(II) [i.e Pb(NO3)2]. Hint:There is a redox reaction in the first step, where the bleach (ClO^-) is the oxidising agent.
ultraviolet light strikes a metal plate and ejects electrons having kinetic energy E = 2.04 eV. Calculate the binding energy of an electron at the metal surface.
where a is constant and -infinity
When a voltage of 30 V is applied to the heater for 3.0 min, a constant current of 2.5 A is observed. The calorimeter temperature increases from 20.00C to 25.59C. Calculate C_bomb for the calorimeter. Assume 2000.0 g of water in the bucket.
If the activation energy for a given compound is found to be 103 kJ/mol, with a frequency factor of 4.0 × 10^13 s^-1, what is the rate constant for this reaction at 398 K
Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")
At 212 mm Hg and 24 °C, a sample of gas occupies a volume of 125 mL. The volume is increased to 325 mL and the temperature is reduced to -5.0 °C. What is the final pressure of the gas in the flask?
A steam turbine receives a flow of 10,000 lb of steam per hour and delivers 500 kW in that period. Heat losses from the casing and the turbine bearings may be assumed neglible
Consider the titration of 30.0 mL of 0.048 M NH3 with 0.025 M HCl. Calculate the ph after the following volumes of titrant have been added.
Calculate ?H for the reaction 2C(s) + H2(g) ? C2H2(g) given the following reactions and their respective enthalpy changes
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