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Which one of the following processes involves a decrease in entropy? A) the decomposition of NH3(g) to H2(g) and N2(g B) The condensation of steam to liquid water C) The sublimation of CO2 from solid to gas D) The evaporation of ethanol E) The dissolution of NH4NO3
The combustion of carbon with excess oxygen forming carbon dioxide is exothermic. C(s) + O2(g) => CO2(g) ?Hrxn = -393 kJ If 9,494kJ of heat is needed from the combustion, how much carbon (g) must be consumed? Enter your answer with three significa..
The total concentration of dissolved ions in seawater is about 1.1 M, but concentrations can vary depending on the exact location and conditions.
Compound A is C4H9Cl and shows two 13C NMR resonances. Compound B is an isomer of compound A; it shows four 13C NMR resonances, and in the spin-coupled mode the resonance farthest downfield is a doublet. Identify compound A
Why we have a decrease in in the volume of the crude organic product during the extraction with HCl. What causes this decrease
A 2.5L bottle of concentrated sulfuric acid H2SO4 (16M) falls and breaks on the floor. What mass of NaHCO3 would be required to neutralize this acid spill through the following reaction HCO3 + H => H2O +CO2
What are the relative percentages of hydrogen cyanide (HCN) and cyanide ion in a dilute aqueous solution
Explain why light intensity is dependent on the distance the detector is from the light source. Describe the mathematical relationship. Explain why all comparative measurments for this experiment should be made with the optical cable the same dist..
Suppose you want to heat air in your house with methane (CH4). Assume your house has 275 m2 of floor area and that ceiling is 2.50 m from the floor.
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.140 M HClO(aq) with 0.140 M KOH(aq). The ionization constant for HClO can be found here.
During ther processing of black-and-white film, excess silver (I) halides are removed by wadhing the film in a bath containing sodium thiosulfate. This treatment is based on the followig complexation reaction:
If equal masses of both metals were transferred to equal volumes of water in seperated graduated cylinders, which graduated cylinder would have the greatest volume change. why.
A fossil is found to have a 14C level of 75.0% compared to living organisms. How old is the fossil
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