Chem A+B Comprehensive Final v4, 230518
Multiple Choice - 2.5 points each
1.
To determine the level of soil pollution across several states, a scientist would most likely use which method of gathering data?
a.
observation of animals drinking the water
b.
controlled experiment
c.
scientific modeling
d.
scientific survey
2.
What is the oxidation number of F atoms in F2?
a.
0
c.
+2
b.
–1
d.
+1
3.
Calculate the mass of 2.50 moles of MgSO4. (molar mass of MgSO4 = 120.38 g)
a.
0.0208 g MgSO4
c.
301 g MgSO4
b.
597 g MgSO4
d.
48 g MgSO4
4.
Chemical bonds between atoms involve the rearrangement of __________ to maximize stability.
a.
neutrons
c.
neutrinos
b.
electrons
d.
protons
5.
In a solution of two substances, the component present in the larger amount is known as the _________.
a.
solute
d.
solite
b.
solvent
e.
solvatent
c.
solate
f.
solver
6.
The measurement 0.037 010 m has how many significant digits?
a.
4
c.
3
b.
5
d.
6
7.
The reason that alcohol evaporates much faster than mercury does is due to differences in their __________.
a.
crystalline structures
c.
vapor pressures
b.
viscosities
d.
surface tensions
8.
Which gas law is represented by the equation PV = nRT?
a.
Gay-Lussac's law
c.
combined gas law
b.
ideal gas law
d.
Avogadro's law
9.
Copper is used more often than aluminum for electric wires. What property of matter does copper have to a greater degree than aluminum?
a.
malleability
c.
ductility
b.
density
d.
conductivity
10.
The disappearance of dry ice left out in a dish is an example of __________.
a.
condensation
c.
sublimation
b.
evaporation
d.
melting
