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An empty 5.00- flask is charged with 0.450g of pure H2S(g) , at 25 degrees celsius What is the initial pressure of H2S(g) in the flask?
Helium gas at constant pressure of 7.4 atm, expands in volume from 21.3 L to 79.2 L. The temperature is held at 278 K. Calculate the work done by the gas (in joules).
Calculate the attractive force (in Newtons) between a cation with a valence of +3 and an anion with a valence of -2, the centers
If you added 0.02 mol of X and 0.01 mol of Y to form 100g of the solution 2X(aq)+Y(l) = X2Y(aq), how many moles of X and Y would you need to bring about the temperature change of 21C to 51C?
Calculate the molar solubility of PbCl2 in a 0.20 M NaCl solution. The Ksp of PbCl2 = 1.7 x 10-5. Can any assumptions be made to simplify this calculation
If the total pressure inside the container is 350 mm Hg , what is the partial pressure of each individual component?
The combustion of ethane produces carbon dioxide and steam: 2C2H6 + 7O2 --- 4CO2 +6H20 How many moles of CO2 are produces when 5.55 mol of ethane are burned in an excess of oxygen.
Radio waves travel at the speed =3.00 108 m/s(speed of light,). if Saturn is 7.9 108 km from Earth then Determine how many minutes does it take for a radio message to reach Earth from Saturn?
Decribe how adding a solution of KOH to the original sulfide precipitate results in the separation of Sn4 ion from the other group
Calculate the mass of the solvent (CCl4) in kg. Use the molality calculated in question 2 and the solvent mass calculated in question 3 to determine the number of moles of solute present in this solution.
A solution is prepared by mixing 87.0 mL of 5.00 M HCl and 36.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+ ], [OH - ], and the pH for this solution.
In what region of the electromagnetic spectrum wil the electron transitions from a higher energy state to n1=3 appear for the hydrogen spectrum?
Important information about Proteins, A globular protein in aqueous surroundings contains the following amino acid residues; phenylamine, methionine, glutamate, lysine, and alanine.
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