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What is the molar mass of X if 0.85g of X depresses the freezing point of 100g of benzene by 0.47Cdegrees? Assume X and benzene make an ideal solution. Kf for benzene is 5.12Cdegrees/m
A 275mL sample of O2 is collected over water at 60 degrees C the total pressure 755 torr what is the volume of O2 at STP?
A 1.6 g sample of a molecular compound is dissolved in 104 g of tetrachloromethane (carbon tetrachloride). The normal boiling point of the solution is 61.51degreesC, the normal boiling point of CCl4 is 61.2degreesC. The boiling point constant for ..
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron.
Calculate the heat lost by the hot water, Calculate the heat gained by the cold water, Calculate the calorimeter constant, using the delta T of the cold water.
Lysozyme is an enzyme that breaks down bacterial cell walls. It is found in tears and egg whites and elsewhere. A solution containing 0.150 g of lysozyme in 210 mL of water solution has an osmotic
CaC2(s) + 2H2O(l) = C2H2(g) + Ca(OH)2(aq) . If 34 g of CaC2 are consumed in this reaction, how much H2O is needed?
Concentration of H 2 is observed 2.15 moles/L When the reaction N 2 (g) + 3 H 2 (g) ?? 2 NH 3 (g) comes to equilibrium. Determine the numerical value of the Kc equilibrium constant?
For a certain glass electrode, the selectivity coefficient for Na+ relative to H+ is 1.0E-12. The electrode is calibrated with NBS standard buffers 6.86 and 9.18,
Gasoline (assumed to be 100% octane) is combusted in your car according to the following chemical reaction:
A 2.721 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution.
What volume will contain 5.0 mol of aluminium? The density of aluminium is 2.7 g/ml.
A biochemist is trying to purify the enzyme hexokinase from a bacterium that normally grows in the Arctic Ocean at 5C. In the next lab
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