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A gas has the empirical formula C2 HCl. If 0.0371 moles of the gas has a mass of 6.85 g, what is its molecular formula?
what is the keq value for the acid base reaction between sulfuric acid and nitric acid? Assume that pka of the conjugated acid of nitric acid is -13.
At 70K, CCL4 decomposes to Carbon and Chlorine. The Kp for the decomposition is 0.76. Find the starting pressure of CCl4 at this temperature that will produce a total pressure of 1.1 atm at equilibrium.
What is the ratio of the number of moles of air in the heated balloon to the original number of moles of air in the balloon
The specific heat of calcium metal is 0.653J/gK. How much heat, in joules, is required to heat a 58.5 gram sample of calcium from -5.2oC to 16.7oC. Enter your answer in scientific notation with no units.
How many grams of Ba(OH)2 will be needed to neutralize 76 mL of stomach acid if stomach acid is 0.14 M HCl?
Calculate the number of moles of liquid propane that can be stored in the same volume if the density of the liquid is 0.590 {rm{g}}/{{rm{mL}}}.
What conditions must occur for two atoms to be isotopes? How is average atomic mass determined?
Draw the structure(s) of the cycloalkanes with molecular formula C6H12 that have a 5-membered ring. Use the wedge/hash bond tools to indicate stereochemistry.
A molecule has two amino/ammonium groups with pKas of 8.9 and 10.8, and a carboxyl group with a pKa of 4.1. A biochemist has 100 mL of a 0.1 M solution of this compound at a pH of 8.3. She adds 40 mL of 0.1 M HCl. What is the pH of the resulting s..
Explain why would n-acetyltyrosine ethyl ester have a higher affinity for the active site in chymotrypsin than n-actylvaline ethyl ester based on their shape
Explain a sample of liquid mercury mass 67 g and temperature 92 C is poured into 96 g of H2O at 15 C. Compute the final temperature of the mixture assuming no heat is lost. The heat capacities of Hg as well as H2O are 27.98 and 75.33 J/mol/K, resp..
A 1.95 g sample of potassium bicarbonate is decomposed by heating. If the resulting potassium carbonate weighs 1.54 g and the calculated yield is 1.35 g, what is the percent yield
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