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Arrange the following eluents in the increasing order of their eluting power; place the least powerful eluent first: dichloromethane, pentane, water, and methanol.
A rolaids tablet contains calcium carbonate which neutralizes stomach acid If 44.55mL of 0.448 M hydrochloric acid is required to neutralize one tablet how many milligrams of calcium carbonate are in a rolaids tablet
What is the pH of a buffer solution that is 0.211 M in lactic acid and 0.111 M in sodium lactate? The Ka of lactic acid is 1.4 × 10-4.
why is it dangerous to heat a liquid in a distilling apparatus that is closed tightly at every joint and has no vent to the atmosphere?
Briefly explain why you would expect benzoic acid to be soluble in the two solvents water and dicloromethane
Determine its molecular formula if the molar mass of the compound = 199.55 grams per mole?
The hydrochloric acid has a density of 1.18 g/ml and contains 35.0% HCl by mass. What is the percent of the metallic zinc in the original sample. Assume that the impurity in the zinc does not affect the HCl.
Deficiency of phosphoglyceromutase d) mutation that interferes with the formation of quarternary structure in hemoglobin
A 100.-L flask contains a mixture of methane, CH4, and argon at 25C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy of the gaseous mixture.
What are the equilibrium partial pressures of CO(g) and CO2(g) when 2.32 atm CO(g) and excess FeO(s) react in a sealed container at 1000°C? PCO atm PCO2 atm
A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi. The elastic moduli of the concrete and steel are, respectively,
Calculate the heat of combustion of napathalien on a molar basis. Find the molar heat of comb.: q/1 mol. of napthalien
When a mole of C2H4 is combusted it reacts with 3 moles of O2 to produce CO2 and H2O. How many moles of CO2 and how many moles of H2O are produced?
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