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A sample of H2 id collected by displacing 145mL of water. The pressure of gas and the atmosphere equalized. The atmospheric pressure is 745 mmHg. THe temperature of water and theatof the gas are identical at 26 degress C. The vapor pressure of water at 26 degrees C is 25.209 mmHg. How many moles of gas were collected?
Propane gas (C3H8) is used as a fuel in rural areas. How many liters of C02are formed at STP by the complete combustion of the propane in a container with a volume of 15.0 L
What is the buffer component ratio, ([CH3COO-]/[CH3COOH]) of an acetate buffer
Compute the amount of heat essential to fully sublime ninety grams of solid dry ice (CO 2 ) at its temperature of sublimation if it is given that the heat of sublimation for CO 2 = 32.3 kj/mol express your answers in kilojoules?
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Perutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin
At some temperature, a chemist found the following equilibrium concentrations. [Fe3+] = 6.63 10-3 M, [SCN-] = 7.36 10-3 M, [FeSCN2+] = 4.34 10-2 M
this solution was added 1.960 grams of KI and 50.00 mL of a 0.00923 M KIO3 solution. The excess I3- was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
Calculate the number of moles of the H2O2 in the 10.00 mL sample in every titration from the volume of KMnO4 used and the stoichiometry of the reaction.
Determine what volume would it occupy at zero degree Celsius temperature at same pressure? Express your Answer in units of mL
Write a net ionic equation for the reaction that occurs when aqueous solutions of acetic acid and potassium hydroxide are combined.
a hydrocarbon with an empirical formula CH2 has a density of 1.88 grams per liter at 0 degress C and 1 atm. What is a possible formula for the hydrocarbon?
What mass of CCl2F2 substance must evaporate in order to freeze 109 of water initially at 24 degrees celsius? (The heat of fusion of water is 334 J/g the specific heat of water is 4.18 J/gK .)
When Fe(NO3)3 is dissolved in water, hexaaquiron(III) ions, Fe(H2O)6 3+, forms. Fe(H2O)6 3+ ions hydrolyze in aquesous solution accoring to the equation given below
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