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Combustion of 6.51 mg of a compound yielded 20.46 mg carbon dioxide and 8.36 mg of water. At 100C and 760 torr pressure, 100 mL of the compound vapor weighed 275 mg.
Calculate:
a) Molecular weight
b) Empirical formula
c) Molecular formula
What is the buffer capacity of the resulting solution. (The buffer capacity is the number of moles of NaOH that must be added to 1.0 L of solution to raise the pH by one unit)
A 0.1276-g sample of monprotic acid (Molar Mass = 1.10x 10^2) was dissolved in a 25.0 mL of water and titrated with .0633 M NaOH after 10. mL of base had been added, the pH was determined to be 5.67. What is the Ka for the acid
assume that a gold atom is shaped like a sphere. an atom of gold has a radius of 156 pm and a mass of 197 amu.
A dark glass bottle of chemicals is found in cleaning out an old basement. Part of the label has been eaten away with age. Only the last part of the label is readable.
What mass (in grams) of solid KCl would need to be added to 500 grams of water to make an ideal solution with a boiling point
Given the following dissolving process: Fe2(SO4)3 (s) = 2Fe3+ (aq) + 3SO42- (aq) How many grams of iron (III) ions are produced when 0.450 moles of sulfate ion are produced
Write a balanced nuclear reaction for the production of dubnium-260 and neutron(s) by bombardment of californium-249 with high-energy
A 3.00L bottle containing Ne(g) to 770mm Hg and 27 degrees Celsius. He adds a sample of 0.633g CO2 vapor. Calculate the total pressure inside the container.
What is the chemical balance equation and what causes the color and precipitation?
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O.
Oxides of the alkaline earth family form _______ solutions upon reaction with water. a) acidic, b)basic, c) neutral, or d)amphiprotic
The half-life for the reactant A in the first order reaction A ® B is 36.2 seconds. What is the rate constant for this reaction at the same temperature
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