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The gas is collected over water . If 156 mL of gas is collected at 19oC and 769 mmHg total pressure, what is the mass of hydrogen collected?
Write equations for the ionization of the following acids. Which ones ionize only slightly?
A single pulse of a laser yields an average of 5.00 multiplied by 1018 photons with = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0 g of ice?
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry (and species) that occurs at each level.
What happens to it after bromination of Cholesterol takes place? (ie- why is it that bromination allows you to separate it from cholesterol?) 3) Give a stepwise mechanism for the debromination step
Calculate the entropy change that occurs when 3.5 moles of an ideal gas expands from 1.75 L at 20 degress Celsius to 8.46 L at .54 atm.
A 0.0100 molal aqueous solution of a weak acid freezes at -0.0219 oC. Calculate the percent ionization of the weak acid, HA.
When power was turned off to a 30.0 gal. water heater, the temperature of the water dropped from 75.0°C to 22.5°C. How much heat was lost to the surroundings? (1 gal = 3.785 L) Assume the density of water is 1.00 g/mL.
A solution is made up using equal volumes of 2.0 M acetic acid (Ka= 1.8 x 10 to the power of negative 5) and 0.00050 M HCl.
What mass of potassium can be produced by the reaction of 215 g Na with 296 g of KCl?
Write the reaction of butanoic acid with propanethiol.
if a 2.5 L of Hydrogen is collected over water at 40C and 767 mmHg, what is the volume of dry gas at standard conditions, The vapor pressure of water is 55.3 mmhg at 40 C
Calculate the pH and the concentrations of all species present H3O+, F-, HF, Cl-, OH- in a solution that contains 0.10 M HF Ka = 3.5*10^-4 and 0.10 M HCl.
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