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Assume that a particular reaction evolves 231 of heat and that 20 of work is gained by the system. What are the values of delta E and delta H for both the system and the surroundings?
Determine the amount of energy needed to turn 10g of H2O from 11degrees Celsius to 101degree Celsius? Draw a graph and colve the problem.
How many grams of water are needed to react with 75.0 g CaCN2?
Compute the vapor pressure at 25 °C if it is given that the density of H 2 O=0.9971 g/mL , vapor pressure of H 2 O=23.76 torr, molar mass of sucrose, = 342.3 g/mol,
The rate of effusion of a particular gas was measured and found to be 24.0 mL/min. Under the same conditions, the rate of effusion of pure methane (CH4) gas is 47.4 mL/min. What is the molar mass of the unknown gas?
A beaker with 1.70×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.20 mL of a 0.490 it M HCl solution to the beaker. How much wi..
What is the calculated value of the partial pressure(atm) of O2 in acid mine water of pH 1.700, in which [Fe3+] = [Fe2+]?
CaCN2 + 3H2O -> CaCO3 + 2NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
Hard water at home contains dissolved ions (ex. Ca2+ & Mg2+) that react with soap to form a nasty gray substance. Because this gray stuff would ruin your clothes
if the empty cylinder has the mass of 94.2g and the cylinder with water has the mass of 138.7 g what is the mass of water, volume of water and the density of water.
If 145 mL of 1.10 M KCl are diluted to 515 mL, what is the molarity of the final solution?
A sample of gas occupies 1.55L at STP. Remember, pressure at STP is 1.0 atm. What will the volume be if the pressure is increased to 50 atm while the temperature remains constant
Plutonium-240 (PU-240) is a byproduct of the nuclear reaction that takes place in a reactor. It takes one thousand years for 10% of a 4.60 g sample to decay. (Nuclear decays are first-order reactions)
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