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Hydrogen sulfide, H2S, is a weak diprotic acid. Calculate the sulfide ion concentration in a saturated solution of hydrogen sulfide with a pH of 0.85. Assume that [H2S]=0.10 mol/L in a saturated solution. Write the overall, balanced net ionic equation for the ionization of hydrogen sulfide and the Ka expression for this reaction
a 4.82-gram sample of a compound is dissolved in enough water to form 100.0 ml of solution. this solution has an
column of air with a pressure of 1.57 *10^5 Pa and an area of 1.15 m^2 and given that the acceleration due to gravity is 9.8 m/s^2, what is the mass of this column?
A gas containing only CH4 and N2 is burned with air yielding a flue gas that has an Orsat analysis of CO2:8.7%, CO: 1.0%, O2:3.8%, and N2:86.5%. Calculate the percent excess air used in combustion and the composition of the CH4-N2 mixture.
The diluted solution from the second volumetric flask was found to contain 0.0274 mgNa/L.What is the concentration of Na in the first volumetric flask
Calculate how many grams of phosphorus are present in 2.68 moles of phosphorus pentachloride(PCl5) and also determine the numbers of moles of chlorine are present in 3.71 grams of phosphorus pentachloride?
2000°C the equilibrium constant for the reaction is Kc = 2.4 103. 2 NO(g) N2(g) + O2(g) If the initial concentration of NO is 0.150 M, what are the equilibrium concentrations of NO, N2, and O2.
Write a balanced chemical equation for the decomposition of limestone, CaCO3, to quicklime, CaO, and carbon dioxide.
Discuss the Hazard classification of areas; class, group, division with respect to flammable gas atmosphere in a chemical process industry and Outline the Principles and standards of intrinsic safety, techniques in the design, use of intrinsically..
calculate number of moles of anhydrous compound recovered. c- calculate number of moles of water lost from the hydrated compound.d- what is the formula of the hydrate?
Given: H-H bond energy = 435 kJ, Cl-Cl bond energy = 243 kJ, and the standard heat of formation of HCl(g) is -92 kJ/mol, calculate the H-Cl bond energy.
At what angle would the second order light of the same wavelength be reflected on the same side of the normal to the grating as the incident of light
gaseous mixture of 2.34 kg of silane, Sih4 and 55.4 kg of Argon. Determine the mole fraction of silane
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