January 2003 Regents
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Other Regents Exams
|11 Which type or types of
change, if any, can reach equilibrium?
|12 An increase in the
average kinetic energy of a sample of copper atoms
occurs with an increase in
|2||definition temperature- average kinetic energy|
|13 The empirical formula of
a compound is CH2 . Which molecular formula
is correctly paired with a structural formula for this compound?
must have 4 bonds
formula is a multiple of CH2
This equation represents the formation of a
|2||gaining an electron will make the new ion bigger than that of the original atom|
|15 The high electrical
conductivity of metals is primarily due to
|3||metal- a lattice of positive nuclei immersed in a sea of mobile electrons|
|16 One similarity between
all mixtures and compounds is that both
homo or heterogeneous
compounds-homogenous only (pure)
|17 Which phase change
results in the release of energy?
|4||there must be 4 carbons to have isomers (butane)|
|19 What occurs when NaCl(s)
is added to water?
|1||When a solute is added to water the boiling point increases and the freexing point decreases. This is proportional to the amount of particles in the solution (remember ionic subs. break up)|
|20 Which radioisotope is a
|1||Use Table N- Decay Mode|
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