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Butane's (C4H10) molar enthalpy of vaporization is 22.44 kJ/mol and its normal boiling point is -0.4 degrees C. A 250-mL sealed Erlenymeyer flask contains 0.55g of butane at -22 degrees C. Assume the liquid does not decrease the available volume of the flask for the vapor. How much butane is present as a liquid under these conditions?
Calculate the mg/l of carbon dioxide required to react with 35 mg/l of calcium hydroxide and the m/l of precipitate formed.
A 498 mL sample of laughing gas, N2O, is at 30 oC and 414 torr pressure. (a) How many gas molecules are present? (b) How many atoms are there
Calculate the mass percentage of Na2SO4 in a slution containing 10.6 g Na2SO4 in 483 g water. b) An ore contaings 2.86 g of silver per ton of ore. What is the concentration of silver in ppm
Draw the product that is formed when 1-pentyne is treated with an excess of hydrogen gas and a nickel catalyst
an ideal gas at temperature t0 is slowly com- pressed at constant pressure of 2 atm from a volume of 10 liters to a
which of the following is not a general characteristic of amides?high boiling pointsintermolecular hydrogen bonds are
A 3.00L container is rated to hold gas at a pressure no greater than 100atm. Assuming the gas law behaves ideally, what is the maximum number of moles a gas that this vessel can hold at 27 degrees C
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
the total pressure on the surface of titanis 1220 mmhg. the atmosphere consistsof 82 mol n2 12 mol ar and 6.0
A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 425 cubic centimeters, and total mass is 4.22 kg. What percentage of the spheres are copper
What information is required in order that you are able to diagram an atom?
sulfate dissolves as follows: Na2SO4(s) → 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of solution in which the Na concentration is 0.10 M?
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