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Compute the volume of C2H2 that is collected over water at 23 C by reaction of 1.52g of CaC2 if the total pressure of the gas is 750torr. The vapor pressure of water is 21.07torr.
Acetylene gas, C2H2(g), can be ready by the reaction of calcium carbide with water:CaC2(g)+2H20(l)=Ca(OH)2(s)+C2H2(g)
Methane is burned in a Laboratory Bunsen burner to give CO2 and water vapor. Methane gas is supplied to the burner at the rate of 5.0 L/ min ( at temperature of 28° C and a pressure of 773 mm Hg).
A solution is prepared by dissolving 49.3 g of of KBr in enough water to form 473 mkof solution. calculate the mass % in the soulutionif the density is 1.12 g/mL
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
A student needs to analyze a mixture containing a alcohol and a keytone by silica gel TLC. suggest a likely developing solvent.
aluminum has a face-centered cubic lattice with all atoms at lattice points and a unit-cell edge length of 405.0 pm.
a gas made up of atoms escapes through a pinhole 0.552 times as fast as ar gas. write the chemical formula of the
What is the empirical formula for a compound that contains 20.11 % hydrogen and 79.89 % carbon
what is the equation for ninhydrin test of egg white?also for the ninhydrin test of aspartame? what is the chemical
If 100 grams of liquid water at 100 C and 200 grams of water at 20 C are mixed in an insulated container, what will be the final temperature of water
A tanker carrying 800 kg of BOD waste accidently overturns and spills into a pond with a volume of 100,000,000 L. Assume the pond is completely mixed and has an initial DO of 6.4 mg/L and a temperature of 20°C
which compunds moves to the aqueous NaOH? Provide the chemical reaction that occured when NaOH was added. Clearly indicate the different between ionic bond and covalent bond.
The heat of vaporization of benzene, C6H6 , is 30.8 kJ/mol at its boiling point of 80.1 °C. How much heat is required to vaporize 128 g benzene at its boiling point ?
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