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Benzene's vapor pressure is normally 0.930 atm. A soln of 20.0g unknown molecular solute and 78.11 g benzene has a vapor pressure of 0.900 atm. What's the unknown molar mass? Benzene molar mass= 78.11 g/mole
If the 53 g aluminum block is initially at 25^circ C, what is the final temperature of the block after the evaporation of the 1.02 galcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and t..
If a Boron-10 nucleus absorbs a proton, the radioactive nuclide that is produced may undergo alpha decay. What nuclide is produced in the decay process? Write the balanced radiochemical equations for both processes.
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. Living matter exchanges carbon with its surrounding (for example, through CO2) so that a constant level of 14C is maintained, corresponding to 15.3 decay events per minute
The initial temperature is 298k. The diameter of the cylinder is 0.5m. and the piston height is 1m. a. what is the mass of the weights on the cylinder
The biologist estimates she will need 5100 L of air for the dive. Calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. Write your answer in atmospheres.
You carry out a titration of a pure weak triprotic acid and only see two major pH jumps. One at 10.0 mL and one at 15.0 mL. At what volume is the other equivalence point
The disinfectant hydrogen peroxide (H2O2) decomposes to form water and oxygen gas.How much O2 will result from the decomposition of 3.21 mol of hydrogen peroxide?Answer in units of mol.
a solution of ethanol c2h5oh in water is prepared by dissolving 65.7 ml of ethanol density 0.79 gcm3 in enough water
Does solubility change with pH? If yes, what is the highest solubility for the following. ( pH=7, pH=6, pH=4) (In other words are the following compounds more soluble in neutral, basic or acidic solutions?) a) NaBr b) Ca(OH)2 c) CaBr2
Calculate the pH after the addition of 0.0048 mol of NaOH and Calculate the pH after the addition of 0.018 mol of HCl.
What anion or anions are not presetn in a solution that forms no precipitate upon addition of BaCl2(aq). Which anion of anions may be present in an acidic solution that forms a pale yellow precipitate upon addition of AgNO3(aq)
Calculate the density of Al from this information. What is the planar density of atoms in the (110) plane (and sketch how they are arranged)
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