SAT Chemistry Practice Exam 1
Part B
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101.
NH3 is a nonpolar molecule
BECAUSE
For nonpolar molecules charge is symmetrically distributed
102.
0.01M NaOH has a pH of 12
BECAUSE
NaOH is an ionic compound
103.
The bond between C and Br is polar
BECAUSE
CBr4 molecule has a tetrahedral shape
104.
The rate of effusion of hydrogen gas is four times that of oxygen gas
BECAUSE
The rate of effusion is inversely proportional to the square root of molar mass
105.
The radius of Na+ is smaller than Na
BECAUSE
Na+ is a cation
106.
Al(OH)3 is a strong base
BECAUSE
Strong bases dissociate in water completely
107.
The reaction between HNO3 and NH3 produces a basic salt
BECAUSE
All neutralization reactions produce water and salt
108.
1 liter of Neon gas and xenon gas have the same number of molecules at STP
BECAUSE
Neon has a higher first ionization energy than xenon
109.
Solids and liquids are not a part of the equilibrium expression
BECAUSE
The concentrations of pure solids and pure liquids does not change during the reaction.
110.
A saturated sugar solution is at equilibrium
BECAUSE
The rate of sugar dissolving is equal to the rate of sugar precipitating
111.
Both atoms of Helium gas and Argon gas at 25C have the same average kinetic energy
BECAUSE
Temperature is the measure of the average kinetic energy
112.
The vapor pressure of pure water is lower than that of 1M NaCl solution
BECAUSE
Water has hydrogen bonding
113.
filtration will allow for the separation of MgI2 from water
BECAUSE
The mixture of MgI2 and water is homogeneous
114.
When an electron goes from n=3 to the ground state, it releases energy
BECAUSE
N quantum number represents the principal energy level
115.
2g of CH4 and 2g of C2H8 have the same % mass of carbon
BECAUSE
Both CH4 and C2H8 are organic molecules