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Label each of the following phase changes as either exothermic or endothermic.
i. H2O(s) + heat H2O(l) (1 point)
ii. H2O(g) H2O(l) + heat (1 point)
A flask contains a mixture of Ne(g) and Ar(g). There are 0.250 mol of Ne(g) which exerts a pressure of 205 mmHg. If the Ar(g) exerts a pressure of 492 mmHg.
consider the dissolution of an ionic compound such as potassiumfluoride in water.break the process into the following
The two isotopes of Uranium, 238U and 235U, can be separated by effusion of the corresponding UF6 gases. What is the ratio (in the form of a decimal) of the root-mean-square speed of 238U6 to that of 235U6 at constant temperature
Discuss the key atomic properties (charge, shielding, orbital configuration, etc) that contribute most significantly to following periodic trends 1) Atomic and ionic size 2) Physical properties
When elements in the d-block are ionized, the electrons enter the nd orbitals before they enter the (n+1)s orbitals. Explain why this is so.
Explain why you might expect that the dehydration of 1-butanol as well as 2-butanol would produce a similar composition of alkenes
Write balanced net ionic equation for the neutralization of equal molar amounts of KOH and HClO_4
What is it made of and what does it do? How/why does this allow for a better liquid/liquid separation than a standard simple distillation?
Calculate the pre-equilibrium concentration of Fe3+(aq) in a solution made by mixing 2.8 mL of 2.010?3 M Fe(NO3)3 and 7.2 mL of 2.010?3 M NaSCN. Assume the final volume is 10.0 mL.
a 45- piece of ice at 0 is added to a sample of water at 20. all of the ice melts and the temperature of the water
draw the major diels-alder product formed in the given reaction. all hydrogen atoms are implied. if a chiral carbon
The Starship Enterprise is caught in a time warp and Spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral.
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