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Which of the following compounds exhibits the pattern of m/z values shown below? 41, 43, 57, 87, 101, 116 a. propylbromide b. sec-butyl isopropyl ether c. isopropyl bromide d. 2-hexanol e. 2-butanone
The balloon is designed to continue its ascent to an altitude of 30 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
The vapor pressure of water at 40.0 degrees celcius is 55.32 mmHg. Calculate the vapor pressure of a solution of 1.50m K2CO3 at this temperature (assume 100% dissociation)
estimate the mean ionic activity coefficient for nacl in a solution that is 0.020 molkg naclaq and 0.035 molkg cano32
supoose that ammonia, applied toa field as a fertilizer, is washed into a farm pond containing 3.0 x 10^6 L of water. if the pH of this pond is found to be 9.81
The following questions pertain to the magnitude of the x-component of the speed(absolute value of the velocity) cx=|vx| of atoms in a gas, whose probability distriubution has the form P(cx)= ae^-bc2/x.
25.00 ml aliquots of thiis solution was titrated with monoprotic strong base NaOH (0.0800 M). The titre volume of NaOH was 40.00ml. Calculate the molecular weight of H2A.
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
A vessel contains 0.90g liquid H2O in equilibrium with water vapor at 30C. At this temperature, the vapor pressure of H20 is 31.82 torr. What volume increase is necessary for all of the water to evaporate'
An ideal gas is in a cylinder with a volume of 250.0 mL at a temperature of 25 ºC and a pressure of 700 torr. The gas is expanded to a volume of 1.0 L and the temperature increased to 500 ºC.
A laboratory method of preparing oxygen gas involves decomposition of solid potassium chlorate. The products of the reaction are solid potassium chloride and oxygen gas.
Write the chemical equations representing the first, second, and third acid dissociations. 100mL 0.050 M phosphoric acid is titrated with 0.10 M NaOH. Calculate the pH of the solution after 25mL of NaOH have been added.
Determine if the sample has non-volatile impurities (dissolved in it) b. If found to contain such impurities, determine a suitable method for its purification
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