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What is the maximum energy that can be extracted as (a) heat and (b)non-expansion work when 1.0 kg of natural gas is burned under standard conditions at 25 deg celsius. Take the reaction to be CH4(g) + 2 O2(g) ----> CO2(g) + 2 H2O(l).
What is the number of moles of iron produced if only 4 moles of NaN3 are consumed. b)Determine the mass of Na2O produced if only 25g of iron
In the following reaction, what mass of mercury(II) oxide, HgO, would be required to produce 473 L of oxygen, O2, measured at STP
what is the solubility of O2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25°C, and that the mole fraction of O2 in air is 0.209 at both 12,000 ft and at sea level.
An enzyme (MW = 20,250) catalyzes the hydrolysis of a newly discovered substrate. The kcat was found to be 2000 sec-1 and Km = 0.05 M. Using this information answer the following questions.
why would a direct measurement of the heat of decomposition of sodiium hydrogen carbonate be impossible usig a coffee cup calorimeter.
sand and iron particles that are similar in size and color are mixed together in a beaker. what would be the best method of separating the particles?
A gas is heated from 269 K to 283 K while its volume is increased from 21.5 L to 37.0 L by moving a large piston within a cylinder. If the original pressure was 1.10 atm, what would be the final pressure?
Assume that 50.00ml of 0.100M HCl was added to 125ml of 0.100M sodium acetate. Is the resulting solution a buffer? Why or why not? Calculate the pH of the resulting solution.
Calculate the pH of the solution which results from adding 38.54 mL of 0.1012 M KOH to the cyanic acid/cyanate buffer of the previous problem(*). You must show appropriate chemical equations for full credit.
A solution contains 3.2x10-1M Co2+ and 2.5x10-3M Fe3+. NaOH is added to the solution, which cation will precipitate first?
What is the sum of the simplest whole number ratio coefficients in the balanced chemical equation for complete combustion of C3H8.
The mole fraction of O2 in the air is 0.2094, and the mole fraction of N2 is 0.7809. Calculate the density of air at 25 degree celcius and the pressure is 1.00 atm.
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