CHM 1010
GAGE
FALL 2008
NAME ________________________________
September 26, 2008
EXAM 1
1.
a.
Provide the name for each of the following:
SnO
_________________________
S4N2
(12)
____________________________
KMnO4____________________________ (NH4)2HPO4 ________________________
H2SO4 ____________________________
b.
MgF2 _____________________________
Provide the symbols for each of the following:
(12)
phosphorus trihydride________________________ calcium chlorite ___________________
aluminum sulfide ________________________
strontium nitrate ___________________
hydrobromic acid __________________________ chromium (III) acetate _________________
2.
a.
Write the balanced equation for the reaction represented by the boxes below.
(4)
---------->
_______________________________________________________________________
b.
Balance each of the following chemical equations and classify the type of reaction
each represents.
(12)
H2O
+
P2O5
----------------->
H3PO4
_______________________
C4H6O2
+
O2
Ca(NO3)2 +
-------------->
CO2
CrF6 ----------------> CaF2
+
H2O
_______________________
+ Cr(NO3)6
_______________________
c.
Write the LAST reaction above in words.
(3)
d.
Complete and balancethe reaction below
(3)
Mg
+
HNO3
-------------->
3.
The typical dosage of ibuprofen for serious muscle strain is 600 mg. What is the
concentration of ibuprofen in a 138 lb person expressed as g/kg of body mass?
454 g = 1 lb
(10)
4.
A sample of a new plastic has a mass of 245 grams. The sample is 22.5 mm long, 4.2 cm
wide and 0.051 m deep. What is the density of the sample?
(8)
Multiple Choice. Select the best response for each of the following statements or questions. (36)
_____1.
Vanillin contains 63.15% C, 5.30% H, and 31.55% O whether it is extracted from
vanilla beans, synthesized chemically from clove oils, or extracted from wood
pulp wastes. Vanillin is most likely to be:
a. homogeneous mixture of elements
b. heterogeneous mixture of elements
_____2.
If you express the number 0.000568 in scientific notation with two significant
figures it would be:
a. 5.7 x 10-3
_____3.
b. 5.7 x 104
A student makes a repeated measurement of the length of an object and obtains
the following data: 34.5 cm, 35.0 cm, 32.6 cm, 35.0 cm, 33.8 cm. The value
measured by an accurate independent source is 35.0 cm. You can say that the
student is:
b. 78.96 amu
c. 70 amu
d. 36 amu
Which element contains 27 electrons?
a. calcium
_____7.
c. accurate but not precise
d. neither accurate nor precise
An atom of selenium contains 36 neutrons. The mass number of the atom is:
a. 78.96 g
_____6.
d. 5.7 x 10-4
c. Li2+, Ba3+, Ag2+
d. Fe1+, Ba4+, Al2+
a. accurate and precise
b. precise but not accurate
_____5.
c. 5.68 x 10-4
Some common ions based on metals are:
a. Li1-, Ca2+, Cu2+
b. Li1+, Ba2+, Ni2+
_____4.
c. solution of C in H and O
d. compound of C, O, and H
b. copper
c. cobalt
d. colium
Which of the following is a physical change?
a. release of light by heated Mg
b. combustion of glucose
c. vaporization of alcohol
d. heating of iron in air
_____8.
The statement, "A chemical reaction never creates products that weigh more or
less than the reactants", is based on three centuries of experimental observation.
The statement is an example of:
a. hypothesis
_____9.
b. theory
d. belief
The nucleus contains:
a. neutrons only
b. electrons and neutrons only
_____10.
c. law
c. protons only
d. protons and neutrons only
Which of the following is a chemical property of iron?
a. Iron is soft when pure.
b. Iron melts at 1808 K.
c. Iron corrodes in moist air.
d. Density = 7.874 g/cm3
_____11.
Which of the following property is NOT an intensive property of a material?
a. melting point
b. mass
c. combustible
d. density
e. color
_____12.
Which sample below would contain individual atoms?
a. oxygen gas
b. sodium chloride in water
Bonus Question:
c. water
d. steel
You asked for it!
How many grams of carbon are required to form 0.056 moles of chromium (VI)
carbonate?