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The mass spectrum of an organic compound shows the relative abundances of M to be 83.79% and M 1 to be 13.59%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundances: 12C is 98.93% and 13C is 1.07%
The following statements describe some physical and chemical properties of sucrose (table sugar). Which response includes all that describe chemical properties, and none that describe physical properties?
If the percent yield of 3NO2 + H2O yields 2HNO3 + NO is 75.0 percent and 45.0 grams of NO2 are consumed in the reaction, how many grams of HNO3 are produced?
(A) What mass of Potassium hydrogen carbonate is needed? (B) What volume of 0.32 M HCl is needed to react completely with the amount of potassium hydrogen carbonate from 2(a)
a 45-g piece of ice at 0 degrees C is added to a sample of water at 9 degrees C. All of the ice melts and the temperature of the water decreases to 0 degrees C. How many gram sof water were in the sample?
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 6.00 mL Ti solution of unknown concentration with 3.50 mL of a 10.2 ?g/mL solution of Co
What is the substance being oxidized?
What are the pH values if you take into account that the 8.00 mL of 0.100 M acid was first diluted with 100 mL water?
Which of the following molecules have dipole moments? For the molecules that are polar, indicate the polarity of each bond and the direction of the net dipole moment of the molecule.
Do all ionic compounds dissolve in water, Do all covalent compounds dissolve in water? answer should be 50 to 100 words.
I need help in describing the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
What is the change in internal energy of the system, delta U. The force of gravity on a mass m is mg, where g is the constant acceleration of gravity (g=9.80 m/s^2).
He decides to run an FTIR on the resultant powder on the cold finger apparatus. WHat functional group would clearly cofiirm that the white powder is indeed caffeine and not catechin?
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