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A certain microwave delivers 750. watts (J/s) of power to a coffee cup containing 50.0 g of H2O at 25 degrees C. if the wavelength of microwave in oven is 9,75 cm how long does it take and how many photons must be absorbed to make H2O boil?
specific heat capacity for H2O is 4.18 J degrees C-1g-1. Assume only water absorbs energy of microwaves.
The PH° of formation values for water vapor and liquid water are -241.82 and -285.83 kJ/mol, respectively. Calculate the PH° of vaporization for water in kJ/mol.
Make educated guesses at the pictures for the LGO's for tetrahedral and octahedral. Propose the appropiate pictures for the LGO's symmetry labels for the square pyramidal Cr(CO)5. With your pictures, can you justify the energy levels for the bondi..
Suppose at some temperature, Kc= 6.20 X 10^8 for the reaction 2NO(g) + 2H2(g) N2 (g) + 2H2O(g). 5.00 M NO(g) and 5.00 M H2 (g) are placed in a reaction flask. Calculate the equilibrium concentration of H2 (g).
1. which of the following is a general property of a basic solution?nbspnbspnbspnbsp a. tastes bitternbspnbspnbspnbsp
Calculate Delta Hrxn for the following reaction- Fe2O3 (s) + 3CO (g)-----> 2Fe (s) + 3CO2 (g). Use the following reactions and given delta H's. 2Fe (s) + 3/2O2 (g)----->Fe2O3 (s), Delta H= -824.2 kJ CO (g) + 1/2O2 (g)----->CO2 (g), Delta H=-282.7 ..
Give an acceptable name and identify the functional group; and
Calculate the specific heat of a metallic element if 314 joules of heat energy are needed to raise the temperature of a 50.0 gram sample from 25 degrees celsius to 50 degrees celsius.
What are the consequences of removing some of the phase transfer catalyst along with the hot reaction mixture after refluxing. a)The phase transfer catalyst acts to remove small amounts of water from the mixture leading to increased purity
Calculate the vapor pressure of a solution of 20 g of benzene (C6H6) and 20 g of toluene (C7H8) at 90 oC. Is the boiling point of this mixture higher or lower than 90 oC at an atmospheric
The following lab requires water free conditions as well as reflux for reaction to be successful. Draw a schematic and label your reaction set up
what is the equilibrium expression for the reversible reaction of: 2CrO42-(aq) + H2O(l) Cr2O72-(aq) + 2OH-(aq)
Ammonia will react with oxygen in the presence of a copper catalyst to form nitrogen and water. From 164.5°C to 179.0°C, the rate constant increases by a factor of 4.27. What is the activation energy of this oxidation reaction?
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