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Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure for NH4
a chemical engineer studying the properties of fuels placed 1.475 g of a hydrocarbon in the bomb of a calorimeter and
When a student cleans their dorm room, the entropy of the system must decrease. How is this NOT a violation of the second law of thermodynamics?
1. What is the sum of the coefficients when the following is balanced 2. Cryolite is a compound needed for the Hall-Heroult process for aluminum. Cryolite is produced by the following reaction
The other flask is filled with Ar and has a volume of 1.85 L and a pressure of 115 torr. If the valve is open and the gasses mix and assuming that the temperature is constant, what is the final total pressure
A Diels-Alder reaction of 2,5-dimethylfuran and maleic anhydride gives a compound A that undergoes acid-catalyzed(H2SO4) dehydration to give 3,6-dimethylphthalic anhydride
Calculate the molality of a hydrochloric acid solution that is 26.4% by mass and has a density of 1.19 g mL^-1
Draw the structures of salicylic acid and aspirin. Circle and identify the functional groups present in each compound and sulfuric acid is a catalyst. What does that mean?
The density of palladium(Pd) is 12.0 g/mL at 20 degree Celsius temperature and the density is 11.0 g/mL 1550 degree Celsius temperature . What is the change in volume (V) if tempreture raises of 4.21 kg Pd from 20°C to 1550°C.
You are to prepare buffers at pH = 2.8, 4.5, and 7.5. In the 2nd column write the fomulas for the respective weak acid-conjugate base buffer system that is the best choice for each pH from the listed acids
what are the units to be for a third order reaction? if time units are in
The calorimeter contains 1.00 kg of water (heat capacity of H2O = 4.184 J/g°C) and the heat capacity of the empty calorimeter is 0.10 kJ/°C. How much heat is released per gram of oil shale when it is burned?
Calculate the pZn of a solution prepared by mixing 25.0 mL of 0.0100 M EDTA with 50.0 mL of 0.00500 M Zn2+. Assume that both the Zn2+ and EDTA solutions are buffered with 0.100 M NH3 and 0.176 M NH4Cl to provide a constant pH of 9.00.
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