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What types of crystals are formed by the following solid elements and compounds: BF3 BN (NH4)CO3? In each case, state the types of forces among the particles that make up the lattice.
How many grams of water can be cooled from 54.7 ? to 43.1? by the evaporation of 19.7 g of water? The heat of vaporization of water in this temperature range is 2.40 kJ/g
A solution is prepared by dissolving 10.5 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 13.00 mL sample of this stock solution is added to 55.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
Assuming that the total pressure of the gases is 1.52 and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure (in atmospheres) of each gas.
Determine At what temperature does C 6 H 6 boil when the external pressure = 470 torr?
A molecule of ethyl alcohol is converted to acetaldehyde in one's body by zero order kinetics. If the concentration of alcohol is 0.018 mol/L and the rate constant
A 10.0L container of helium gas with a presure of 250mmHg at 0 degrees Celsius is heated to give a pressure of 1500mmHg. What is the temperature in degrees Celsius?
Working with ideal gas law, The pressure of a sample of gas at a constant temperature of 25 degrees C is increased from 1.0atm to 1.3atm
The Cu-Ni system is an isomorphous one, meaning that the crystal structure does not change with alloying; in particular, Cu and Ni atoms randomly substitute for one another within a FCC crystal structure
A medical patient has the ball section of his femur replaced with a titanium implant. Assuming the implant is a perfect sphere with a radius of 1.5 inches
How many grams of water can be cooled from 36 degrees celsius to 23 degrees celsius by the evaporation of 53g of water.
A solution was prepared by mixing 70ml of 4.00 mol/L HCl and 30.0 mL of 8.00 mol/L HNO3. Water was then added until the final volume was 500ml. What is the [H+] and what is the pH ?
What mass of sucrose should be combined with 541 of water to make a solution with an osmotic pressure of 8.30 at 295 ? (Assume the density of the solution to be equal to the density of the solvent.)
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