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What mass of oxygen gas is required for the complete combustion of 6.12g of propane (C3H8) to produce CO2 and H2O?
Name two intermolecular forces that are mixed up in chromatography and the roles that they play during separation.
Explain the oxalates were heated in a TGA leaving a residue of 0.5713 g in the range of 320-400°C and 0.4673 g in the range of 580-620°C. Compute the % Ca and Ba in the sample.
The activity of a sample of Ba-137m has reduced by 75% from its initial activity after 5.10 minutes. Explain what is the half-life of Ba-137m. Define what fraction of activity remains after 6.25 minutes. (A=Aoe (-kt); k = .693/t1/2)
at a constant volume and moles the temperature of a sample of neon ne gas increased from 320f to 370c. what is the
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.2 L of 0.39 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.71
Determine the volume of 0.890 M NaOH needed to reach the equivalence point in the titration
Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of H2C2O4 and H2O in the balanced reaction
The reaction between hydrogen and oxygen to yield water vapor has delta H+ -484kJ: 2H2(g)+O2(g)-->2H2O(g) delta H=-484 kJ Part A How much PV work is done in kilojoules for the reaction of 0.20 mol of H2 with 0.10 mol of O2 at atmospheric pressure ..
Problem- Estimate the calcium concentration in a groundwater sample, which has a pH of 5.50. Assume that the groundwater at his location is saturated with CO2 at a partial pressure of 0.1 atm.
Sketch a potential energy diagram for this reaction. Make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.
write the equations for two different acid base reactions of diethylamine with water. Indicate the direction of the equlibrium for both reactions. The pKa of diethyl ammonium ion is 10.94.
Problem- Molal freezing point depression constant is 9.0036 for solvent W. 0.460 grams of unknown compound Z to 8.050 grams of solvent W and measures a new freezing point 59.8 C for this mixture. What is the molecular weight of unknown compound Z
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