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The activation energy for a given reaction is kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased from °C to °C?
Calculating concentration of an ion, Given the concentration of hydroxide ions, use the ion product constant of water to calculate the concentration of the other ion at 298 K
Calculate the amount of energy present in the following photons and find the region of electromagnetic spectrum for each.
How many moles of copper atoms were lost? ii. The Faraday constant. iii. The charge of one electron. iv. The mass of one electron.
Determine the rate law and the value of k for the following reaction using the data provided
A 0.264-gram sample of an amino acid was dissolved in 95.0mL of water and titrated with 0.105M NaOH. The first equivalence point was found at V(OH)=16.3mL.
A gas has a pressure of 4.82035 atm when its volume is 2.75 L. What will the pressure be when the volume is changed to 1.91015 L, assuming constant temperature.
Calculate molarity?if one mole of sodium hydroxide was dissolved estimate the number of calories that would be produced. (ΔHsolnNaOH)
A 0.692 g sample of glucose, C6H12O6, is burned in a constant volume, bomb calorimeter. The temperature change is measured at 1.80 degrees C.
a sample of sodium hydrogencarbonate, NaHCO3 is contaminated with 5-10% NaCl. How should i carry out an experiment to determine the percentage purity of NaHCO3 ?
for the neutralization reaction involving HCl and Mg(OH)2, how many liters of 0.60 M HCl are needed to react with 45 g of a 2.5 M Mg(OH)2 solution? (density= 1.3 g/mL)
The heat of reaction for the combustion of cyclohexane, C6H12, is 936.8 kcal/mol. What is the heat of combustion for cyclohexane in kcal/gram?
The mass of a cube of iron is 379 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
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