URI Chem 103 Final Exam
1 cm^2 is equal in volume to... - correct answer-1 ml
A 0.9% NaCl (w/v) solution in water is - correct answer-produced by mixing 0.9 of NaCl in a
solution of 100 ml
a colligative property - correct answer-depends only on the number of species added to a
solution
A gas sample is collected in a balloon. What happens to the density of the gas as the
balloon is chilled? - correct answer-density increases
absolute zero - correct answer-273 k
an ion in aqueous solution that is surrounded by water molecules is said to be - correct
answer-hydrated
are electrons made of quarks? - correct answer-no
As ice is heated it melts. Explain this in terms of the temperature effect on the cohesive and
disruptive forces - correct answer-increasing temperature increases molecular motion and
breaks more hydrogen bonds
atoms are considered isoelectronic if... - correct answer-they have the same electron
configuration
covalent bonds within a polar molecule are usually broken when dissolving water - correct
answer-false
doubling a volume of an 8 M sample with water will produce... - correct answer-a 4 M
solution
for a reaction to be spontaneous, what must be true - correct answer-the enthalpy of the
reactants must be higher than the enthalpy of the products
How many atoms are contained in 5.585 g of Fe? - correct answer-one-tenth of Avogadro's
number
How many moles of oxygen are in 2.5 moles of glucose, C6H12O6? - correct answer-15
moles of oxygen
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