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A graduated cylinder contains 152 mL of water. A 14.0 g piece of iron (density = 7.86 rm{g/cm^3}) and a 16.0 g piece of lead are added. What is the new water level in the cylinder?
what is the maximum amount of P4S10(444.545 g/mol) which could be formed from 17.12 g of P4 (123.895 g/mol) and 0.137 mol of S8 (256.52 g/mol).
Calculate the heat of formation, Hof, of pentane given that the Hof of H2O(l) is -285.3 kJ mol-1 and Hof of CO2(g) is -393.5 kJ mol-1.
calculate the atomic mass of an element with a measure specific heat of 0.14 J/(g C). Express your answer in atomic mass units to two significant figures.
A student placed 18.0 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mark on the neck of the flask was reached.
A 113L sample of helium at 27 degrees Celsius is cooled at a constant pressure to -78 degrees Celsius. calculate the new volume of the helium.
What is the partial pressure of H2O in the compressed gas mixture? (See this table.) torr (b) What mass of water vapor condenses to liquid g
What mass in grams of carbon dioxide is produced if 85.0 mol of magnesium carbonate, MgCO3, are heated and allowed to decompose according to this equation? MgCO3(s)--> MgO(s) + CO2(g)
A sample of an ore of iron, hematite, is 56% Fe2O3. How much iron is there in 2 kilograms of the ore?
Which of the following correctly lists the following isomeric alkanes in order of increasing boiling point? n-hexane, 2,3-dimethylbutane, 2-methylpentane
Sodium atoms emit light with a wavelength of 330 nm when an electron moves from a 4 p orbital to a 3 s orbital. What is the energy difference between the orbitals in kilojoules per mole?
A 787 mL gas sample at STP is compressed to a volume of 226 mL, and the temperature is increased to 29?C. What is the new pressure of the gas in Pa.
Which of the following compounds is expected to have the highest boiling point? octane, 2,3-dimethylhexane, 2,2,3,3-tetramethylbutane
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