CHEM 1120 Final Questions With Complete Solutions
A 400.0 g sample of water is at 30.0 °C. How many joules of
energy are required to raise the temperature of the water to 45.0
°C Correct Answers 25100 j
A car gets 25.6 miles per gallon of gasoline. A full tank of
gasoline contains 56.8 L. How manymiles can this car travel on
a full tank of gasoline? (1.000 L = 0.264 gal) Correct Answers
384 mi
A compound is found to consist of 2.89 g of calcium and 5.11 g
of chlorine. What isthe percent by mass of calcium in the
compound? Correct Answers 36.1%
A piece of metal has a mass of 86.24 g and a volume of 13.4
mL. What is its density? Correct Answers 6.44 g/mL
A tentative explanation of certain facts that provides the basis
for further experimentation is a(n) Correct Answers hypothesis
Convert 1.00 in2to cm2 Correct Answers .45 cm2 - don't forget
to square 2.54 as we
Convert 4.30 feet into centimeters. Correct Answers 131 cm
Convert 76.9 L to cm3. Correct Answers 76900 cm3 - cm3 =
mL .... mL = 1/1000 L
CrO42- is called a Correct Answers chromate ion
, Divide: 3.724 × 10-3 by 2.46 × 104. When expressed with the
proper number of significant figures, the result is Correct
Answers 1.51 × 10-7 - divide by 104 is equivalent to multiply
by 10-4
Express the number 2.64 × 104 in standard notation Correct
Answers 26400
Given the unbalanced equation: Al + CuO → Al2O3 + Cu.
When properly balanced with the smallest possible integers, the
balancing coefficient of Al2O3 is Correct Answers 1
Given the unbalanced equation: Al + CuSO4 → Al2(SO4)3 +
Cu. When properlybalanced with the smallest possible integers,
the sum of the balancing coefficients is Correct Answers 9
Given the unbalanced equation: PbCl2 + Na2Cr2O7 →
PbCr2O7 + NaCl. Whenproperly balanced with the smallest
possible integers, the sum of the balancingcoefficients is
Correct Answers 5
Halogens belonging to Group 7A form ions with a charge of
Correct Answers -1
How many atoms of oxygen are indicated in the formula
Fe(NO3)3? Correct Answers 9
How many protons does the isotope carbon-14 have? Correct
Answers 6
A 400.0 g sample of water is at 30.0 °C. How many joules of
energy are required to raise the temperature of the water to 45.0
°C Correct Answers 25100 j
A car gets 25.6 miles per gallon of gasoline. A full tank of
gasoline contains 56.8 L. How manymiles can this car travel on
a full tank of gasoline? (1.000 L = 0.264 gal) Correct Answers
384 mi
A compound is found to consist of 2.89 g of calcium and 5.11 g
of chlorine. What isthe percent by mass of calcium in the
compound? Correct Answers 36.1%
A piece of metal has a mass of 86.24 g and a volume of 13.4
mL. What is its density? Correct Answers 6.44 g/mL
A tentative explanation of certain facts that provides the basis
for further experimentation is a(n) Correct Answers hypothesis
Convert 1.00 in2to cm2 Correct Answers .45 cm2 - don't forget
to square 2.54 as we
Convert 4.30 feet into centimeters. Correct Answers 131 cm
Convert 76.9 L to cm3. Correct Answers 76900 cm3 - cm3 =
mL .... mL = 1/1000 L
CrO42- is called a Correct Answers chromate ion
, Divide: 3.724 × 10-3 by 2.46 × 104. When expressed with the
proper number of significant figures, the result is Correct
Answers 1.51 × 10-7 - divide by 104 is equivalent to multiply
by 10-4
Express the number 2.64 × 104 in standard notation Correct
Answers 26400
Given the unbalanced equation: Al + CuO → Al2O3 + Cu.
When properly balanced with the smallest possible integers, the
balancing coefficient of Al2O3 is Correct Answers 1
Given the unbalanced equation: Al + CuSO4 → Al2(SO4)3 +
Cu. When properlybalanced with the smallest possible integers,
the sum of the balancing coefficients is Correct Answers 9
Given the unbalanced equation: PbCl2 + Na2Cr2O7 →
PbCr2O7 + NaCl. Whenproperly balanced with the smallest
possible integers, the sum of the balancingcoefficients is
Correct Answers 5
Halogens belonging to Group 7A form ions with a charge of
Correct Answers -1
How many atoms of oxygen are indicated in the formula
Fe(NO3)3? Correct Answers 9
How many protons does the isotope carbon-14 have? Correct
Answers 6
