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The normal freezing point of mercury is -38.9 C and its molar enthalpy of fusion = 2.29/kj/mol. What is the entropy change of the system when 50g of mercury freezes at the normal freezing point?
Explain how the sponge nucleoside cytosine arabinoside and fungal nucleoside cordycepin combat cancer (give their structures as well).
34.62mL of 0.1510M NaOH was needed to neutralize 50.0mL of an H2SO4 solution. What is the concentration of the original sulfuric acid solution?
What effect on the value of Ca(OH)2's Ksp (6.5x10^-6 ) would sucking up some suspended calcium hydroxide solid have. Would the Ksp value be higher or lower than the normal value. Why
Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu. The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu.
What is the pressure in psi for a pressure head of 46.2 feet? What is the pressure in psi for a pressure reading, in psi, at the bottom of a 30 feet high reservoir, which has a diameter of 50 feet?
sodium azide, a compound containing only sodium (Na) and Nitrogen (N), is used as a propellant for inflating airbags in some automobiles. A sample of sodium azide was weighed into a crucible.
a what temperature change would you expect in which 50.0 ml of 2.0m hcl is combined with 80.0 ml of 2.0 m naoh in
Compute the change in entropy of the universe if water vapor of one mol condenses to liquid water at the temperature of 100°C in a thin flask in an ambient laboratory temperature of twenty five degree celsius.
The pH in a lake the size of 4.0 km X 7.0 km and an average depth of 100 m is found to be 4.5. Calculate the mass of calcium carbonate that must be added to the lake water in order to raise its pH to 6.0.
In a first order decomposition in which the rate constant is 0.03 sec-1, how much of the compound (in mol/L) is left after 26 sec, if there was 2.00 mol/L at the start
How much heat is gained by copper when 51.8 g of copper is warmed from 15.5*C to 76.4*C? The specific heat of copper is 0.385 J/(g x *C)
lead (II) sulfide (PbS) has a Ksp of 3.0 x 10^-28 . what is the concentration of lead (II) ions in a saturated solution of PbS
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