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Elemental analysis of a compound containing H, B and O gave 1.3% H and 27.5% B. The molecular weight of the compound is 157.3. What is the molecular formula of the compound? a. H3B5O6 b. H2B4O7 c. H2B5O9 d. H2B4O8
When 0.0500 mol of HCl is reacted with 0.0500 mol of NaOH in 50.0 mL of water, the temperature of the water increases by 13.7°C. Calculate the heat of the reaction for the following thermochemical equation
Calculate the value of E^o cell for the reaction 2Ag(s) + Ca2+ (aq) yields 2Ag+(aq)+Ca(s), using the standard reduction potentials
Calculate the pH of a solution containing an amphetamine concentration of 200 mg/L. Express your answer to one decimal place.
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself.
Determine the molarity of a solution prepared by dissolving 4.50 mol of NH4Cl in sufficient water to make 2.00 L of solution.
Give the products you would expect and the mechanism involved for the reaction of 1-bromopropane with:a. Water
Suppose that the observed melting point range of a solid was originally 150-160 °C, but this became 145-145.5 °C after recrystallization. How might you account for this observation
A hydrated iron chloride compound was found to contain 20.66% Fe, 39.35% Cl, and 39.99% water. Determine the empirical formula of this hydrated compound.
c2h6g o2g co2g h2oga consider the unbalanced equation above. how many grams of o2 are required to react with 13.0 g
In dry atmospheric air, the four most abundant components are N2, X = 0.808; O2, X = 0.1915; Ar, X = 9.34x10-5; and CO2, X = 4.066x10-4. Calculate the partial pressure of Ar, in torr, under standard atmospheric conditions.
Under these conditions, calculate the final concentration of glycerol-3-phosphate. Remember to convert kJ to J.
When filling a cuvette with distilled water and measuring it with a spectrofluorometer, upon excitation at 350nm, a band around 397nm appears. This is either a fluorescence band or a Raman band. Suggest what you can do experimentally to identify w..
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