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Sometimes during a reaction contamination can be introduced into the sample. If this happens which of the following would be true about the mass of the sample if it were contaminated?
The measured mass of the product would be higher than what it really is. A.The sample would be unaffected by the contamination. B.The theoretical yield would be higher than it should be. C.The theoretical yield would be lower than it should be. D.The measured mass of the product would be lower than what it really is.
volatile solute was dissolved in 40.0 grams of CCl4. The boiling point of the CCl4 was raised by .357 Degrees C. Kb for CCl4 is 5.02 C/m find the molar mass of the solute.
The buret is filled with the NaOH titrant and the initial volume reading is immediately recorded without waiting the recommended 10-15 seconds.
Consider a gas mixture in a 1.50 dm3 flask at 22.0 C for each of the following mixtures, calculate the partial pressure of each gas, the total pressure and the composition of the mixture in mol percent
Write a chemical equation for the reaction corresponding to the standard enthalpy of formation of N2O5 (g) and determine its value from the following thermochemical data
sodium azide, a compound containing only sodium (Na) and Nitrogen (N), is used as a propellant for inflating airbags in some automobiles. A sample of sodium azide was weighed into a crucible.
Although glucose is a more complicated molecule than CO2 and H2O, there is enough entropy in the O2 products to make the reaction generate entropy overall.
The organic solvent pyridine, C5H5N (aq) is a base with a strong irritating odor. Calculate the pH of a 0.300 M aqueous solution of PYRIDINe at 25 degrees Celcius.
What percentage of total HF molecules are in each of the first 6 rotational levels (J = 0-5) at 25oC ? Howmany levels (values of J) are required to account for 99% of all HF molecules at this temperature
A septic tank leaks into the soil. The organic matter decomposes to produce carbon dioxide. Gas flow is restricted in the soil so that there is no air exchange to the atmosphere above
calculate the volume of air at 35 degrees Celsius and .96 atmosphere that is needed to burn completely 12.51 grams of pentane
Assume equilibrium with the calcium carbonate in the sediment and calculate the concentration of calcium ion
For an electron in a hydrogen atom, compute the most likely radius (in Angstroms) of the electron in each of the following states:
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