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Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more com- plicated, but this is a reasonable ?rst approximation.) The combustion of carbon is described by the equation C(s) + O2 (g) -→ CO2 (g) ?H ? = -394 kJ What is the value of q (heat) when a lump of coal of size 7.9 cm × 7.4 cm × 6.9 cm is burned? What mass of water can be heated from 16C to 100C by burning this piece of coal? Answer in units of g.
Typically the interest rate on the fixed-rate mortgage is higher. Having learned the five core principles, does this make sense?
the relative price of chicken has increased, so Brain would be expected to purchase less both are true, what is the difference?
The City of Springfield has three pension plans: a locally administered police plan for which it is trustee, a statewide cost sharing plan, and a statewide agency plan. The City would include in its CAFR financial statements for:
Find out the minimum space requirements for a factory shed, where such lathes are to be installed. The production is done on single shift basis, @ 8 hrs per day for a week of 6 working days and for 50 weeks/year.
What prevents the ends of chromosomes from getting shorter and shorter with each round of replication?
he consumer has $32 to spend, and the price of X, PX = 4, and the price of Y, PY = 1. How much X and Y should the consumer purchase in order to maximize her utility and How much total utility does the consumer receive?
Angel's net income for the year ended December 31, 2009, was $6 million. The income tax rate is 20%. What is Angel's basic earnings per share for 2009, rounded to the nearest cent?
Calculate k, Calculate also how long it would take for half of A to react. assume pseudo first order with k'=k[OH-], since [OH-] is in great excess.
Which parts of a eukaryotic gene are transcribed?
What effect would this have on the firm's output. Finally, suppose that MCL =$20 and P=$50 but that labor productivity (output per labor hour) is expected to increase by 25%over the next 5 years. What effect would this have on the firm's optimal ..
The work function for Cu metal is 4.80 eV. If a piece of Cu is bombarded by violet light (λ = 4,000 Å), will electrons be ejected? "YES" or "NO" with supporting argument/calculation.
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508g/L at 25C and 721mmHg?
Organic Chemistry-In the mass spectrum of butylbenzene, the base peak occurs at m/z
The rate constant k for a first order reaction is 1.36 * 10 -3 s -1 at 90 degrees Celcius and the activation energy is 78.4 kJ/mol. What is the rate constant for this reaction at 50 degrees Celcius?
Considering which elements are being oxidized and reduced, determine how many moles of electrons are transferred between the elements being oxidized and reduced
total molarity of acid and conjugate base in this buffer. A boy mixes 5.70mL of a 0.330M Hydrochloric acid solution to the beaker. Determine the pH change if The pKa of acetic acid = 4.760.
What is the theoretical yield of bismuth when 393 g of Bi2O3 reacts with excess carbon as shown below? Bi2O3 + C(s) => Bi(s) + CO(g) (not balanced)
Otane has a density of 0.692 g/mL at 20°C. How many grams of O2 are required to burn 5.95 gal of C8H18?
Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent? answer in % molality? answer in mol/kg
if the syinge colume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R?
What is the volume of 1.5 mol of nitrogen gas at 0.5 atm of pressure and 58 degrees celsius
The weight of the product (Hexaphenylbenzene) for this part of the reaction was 2.04 g. What is the percentage yield? What is the overall percent recovery for the three step process?
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