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A mixture of helium and neon weighing 5.50g occupies a volume of 6.80 L at 300 K and 1.00 atm. Calculate the composition of the mixture in mass percent.
If hair grows at a rate of 24 cm per year, then what is the rate of peptide bond synthesis (peptide bonds per second) that would account for the observed growth of hair
What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?
Consider the reaction that describes the Haber process for the production of ammonia: for which Kc at 300oC is 9.5. Calculate Kp for this reaction at 300oC.
When 33.4 mg of a compound is dissolved in 10.0 ml of water at 25 C the solution has an osmotic pressure of 558 torr. Calculate the molar mass of the compound.
In a study of the effect of temperature on halogen decomposition. 0.50 mol of I2 was heated in a 2.5 L vessel and the following reaction occurred. I2 (g)--> 2I (g)
Calculate the number of grams of sulfuric acid in 0.440 of battery acid if the solution has a density of 1.34 and is 39.1 sulfuric acid by mass.
If the heat capacity of the calorimeter was 25 J/C, what would the change in enthalpy (delta H rxn) for this reaction be
A full 50.0 L He cylinder that is attached to a gas chromatograph contains 1.20 kg of the gas. During transport, the temperature of the cylinder may vary from 0ºC to 40ºC. What minimum pressure must the tank be able to sustain
What observed rotation is expected when a 1.50 M solution of (R)-2-butanol is mixed with an equal volume of a 0.750 M solution of racemic 2-butanol
The density of a salt solution is 1.13 gm/cm3. The solution contains 17.0% sodium chloride by weight (there are 17 gm of NaCl for every 100 gm of solution) . What volume of solution will contain 35.0 gm of NaCl
The recovered CuSO4•5H2O was then heated for 20 minutes at 120°C. The mass of the new hydrate was 2.17g. (The molar mass of H2O = 18.015 g/mol, and the molar mass of CuSO4= 159.61g/mol) Calculate the mass of CuSO4 in the new hydrate (CuSO4•XH2O).
understand that covalent-network solids are hard and have high melting points and that molecular solids are soft and have low melting points, but how do I determine the difference if given an chemical formula?
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