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1. Calculate the root square mean velocity of Cl2 at 25 ºC.
2. An Unknowngas effuses at a rate that is 0.462 times that of nitrogen gas (atthe same temperature). Calculate the molar mass of the unknown gasin g/mol.
3. A gasmixture contains 1.28 g N2 and 0.85 g O2 in a1.55 L container at 18 ºC. Calculate the mole fraction and partial pressure of each gas component in the gas mixture.
4. What is the pressure in a 10.0 L cylinder filled with 0.448 mol of nitrogen gas at a temperature of 42 ºC?
A second 50ml aliquot was brought to a pH of 10 with an HCN/NaCN buffer, which also served to mask Cd2+; 11.56 ml of EDTA solution were needed to titrate the Pb2+. Calculate the percentage of Pb and Cd in the sample.
When you made your graphs of Percent Transmittance vs. Concentration and Absorbance vs. Concentration, you include data points for 100%T at 0 concentration, and 0 Absorbance at 0 concentration. Why are these valid data points
Silver chloride, AgCl, is a sparingly soluble solid. Answer the following questions about a saturated solution prepared by placing solid silver chloride in a 3.49 10-5 M NaCl(aq) solution
diamond crystallizes in a cubis cell with a+0.35670 nm and Z=8. Using 3.51 g/cm cubed as the density of diamond calculate te value of avagadro's number.
would the separation of the grape soda dyes work equally well if you reversed the order of IPA concentrations and used 20% IPA first to remove the blue dye and then switched to 5% IPA to remove the red dye
Calculate the number of moles of gaseous nitrogen contained in a sample of 227 mL of gas saturated with water vapour at 20 °C and 90.0 kPa.
When aluminum metal is dipped in an aqueous solution of hydrochloric acid, hydrogen gas is produced with the formation of an aluminum chloride solution. Write the balanced chemical equation showing the phase of reactants and products.
Calculate the expected change in temperature for 1.7 g of NH4NO3 dissolved in 50.0 mL of H2O. Assume that the calorimeter absorbs no heat.
for na and mg ions compare the ratios of the number of ions in the 3p excited state to the number in the ground state
Based on the Hume-Rothery Rules, speculate on the possible driving forces behind the tendency for ordering in this system.
Cars were timed by police radar as they passed in both directions below a bridge. Their velocities (kilometres per hour, numbers of cars in parentheses) to the east and west were as follows
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.
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