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Calculate the standard-state entropy for the following reaction: 1 \rm CH_4(g) + 2 \rm O_2(g) \longrightarrow 1 \rm CO_2(g) + 2 \rm H_2O(l) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. Formula S^\circ \rm J/(K\cdot mol) \rm CO_2(g) 214 \rm H_2O(l) 189 \rm CH_4(g) 186 \rm O_2(g) 205 Express your answer in joules per kelvin to three significant figures.
An airbag in?ates in less than 50 msec by the reaction of NaN3 to produce Na and nitrogen gas at 25 ?C. NaN3 → Na + N2 The volume of the airbag is about 30 liters, and it is ?lled to a pressure of 1.4 atm.
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons.
Hydrogen was cooled from 150 c to 50 c. It's new volume is 75 ml. What was the original volume?
Calculate empirical formula of this compound & molecular formula and calculate the molality of solution of sulfuric acid?
A 2+ ion of a particular element has an atomic mass of 203 and 123 neutrons in its nucleus, a) what is the nuclear charge in this element. Why? b) what are the symbol and name of this element? How do you know?
Determine the percent yield if An 8.50 grams sample of Ammonia gives 12.0 g of Nitric Oxide?
how many calories are used to heat a 50g sample of water from 8.1 degrees celius to 27.4 degrees celcius?
how many grams of metallic copper can be obtained when 54.0 grams of Aluminum react wit 319 grams of CuSO4?
ICE Problem: Calculate Final Concentrations, Phosgene, COCl2 (g), is an extremely toxic gas. It was used during World War I. Today it is used to manufacture pesticides, pharmaceuticals, dyes, and polymers. It is prepared by mixing carbon monoxide ..
Hydrogen gas was cooled from 150C to 50 C. It's new volume is75 mL. What was it's original volume?
A student dissolves 1.50g of copper(II) nitrate in water. After adding aqueous sodium carbonate solution which contains 1.80g of sodium carbonate, the student obtains 0.875g of CuCO3 precipitate.
Combustion reaction, A fuel has the following weight percentage composition, C = 52%, H = 11%, S = 0%, O = 9%, moisture = 13%, Ash = 15%
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