Chm 17 practice final exam
page 5
which of the following ions is not isoelectronic with the noble gas neon?
na
c)
d)
c14
n-
26. which of the following compounds has the smallest formula mass?
a) nh3
b) co
c) bf3
d) h20
oxygen
27. one mole of nitrogen-molecules (o2) would have a mass of
a) 8.0g
b) 16.0g c) 32.0g d) 6.02 x 1023g
28. which of the following chemical equations is balanced?
a) n2 + 3h2 → 2nhs
b) h2 + o2 → h20
c)2so2 + 202 → 3503
d) 2kcio3 → kcl + 302
a)
b)
coordinate covalent bonds differ from normal covalent bonds in that:
one atom supplies more electrons to the bond than the other atom.
the electrons of the bond move about in a coordinated pattern.
atoms involved must always also possess nonbonding electron pairs.
no correct response.
d)
30.
which set of coefficients balances the equation? "
a) 1.2.3,3
c) 1, 2, 3,2
_fe3o4 + __c → _fe + _co2
b) 2,4,6,2
d) 1,1,3,1
31. boyle's law involves which of the following:
a) pressure divided by volume at constant temperature
c) pressure times volume at constant temperature
b) volume divided by pressure at constant temperature
d) pressure times temperature at constant volume
32. which of the following descriptions apply to matter in the solid state?
definite shape and high density
cohesive forces dominate over disruptive forces
kinetic energy dominates over potential energy
d) more than one correct response
33. indicate what the missing words are in the following statement of charles' law: at constant pressure,
volume of a gas sample is proportional to its temperature.
a) directly, kelvin
b) directly, celsius
c) inversely, celsius
d) inversely, kelvin