Chem Test 1
Exam 1A-CHEM 1150 F12
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following elements is a metal?
A) As
B) Se
C) Sn
1)
D) C
E) I
2) Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g/mL.
A) 298 g
B) 568 g
C) 907 g
D) 1100 g
E) 866 g
2)
3) A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.71 g/mL, 1.73 g/mL, 1.67 g/mL, 1.69 g/mL. If the actual value for the density of the sugar solution is 1.40 g/mL, which statement below best describes her results?
A) Her results are neither precise nor accurate.
B) Her results are both precise and accurate
C) Her results are precise, but not accurate.
D) Her results are accurate, but not precise.
E) It isn't possible to determine with the information given.
3)
4) Calculate the molar mass of H2CO3.
4)
A) 62.03 g/mol
B) 61.02 g/mol
C) 74.04 g/mol
D) 60.01 g/mol
E) 29.02 g/mol
5) What species is represented by the following information? p+ = 12
A) Si4+
n° = 14
5)
e- = 10
B) Ne
C) Mg2+
D) Si
E) Mg
6) Which of the following statements about energy is TRUE?
A) Energy is the capacity to do work.
B) Kinetic energy is the energy associated with its position or composition.
C) Energy can not be converted from one type to another.
D) Systems tend to change in order to lower their kinetic energy.
E) The total energy of a system does not remain constant.
6)
7) A covalent bond is best described as
A) the sharing of electrons between atoms.
B) the transfer of electrons.
C) a bond between two polyatomic ions.
D) a bond between a metal and a polyatomic ion.
E) a bond between a metal and a nonmetal.
7)
8) What answer should be reported, with the correct number of significant figures, for the following calculation? (249.362 + 41) / 63.498
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following elements is a metal?
A) As
B) Se
C) Sn
1)
D) C
E) I
2) Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g/mL.
A) 298 g
B) 568 g
C) 907 g
D) 1100 g
E) 866 g
2)
3) A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.71 g/mL, 1.73 g/mL, 1.67 g/mL, 1.69 g/mL. If the actual value for the density of the sugar solution is 1.40 g/mL, which statement below best describes her results?
A) Her results are neither precise nor accurate.
B) Her results are both precise and accurate
C) Her results are precise, but not accurate.
D) Her results are accurate, but not precise.
E) It isn't possible to determine with the information given.
3)
4) Calculate the molar mass of H2CO3.
4)
A) 62.03 g/mol
B) 61.02 g/mol
C) 74.04 g/mol
D) 60.01 g/mol
E) 29.02 g/mol
5) What species is represented by the following information? p+ = 12
A) Si4+
n° = 14
5)
e- = 10
B) Ne
C) Mg2+
D) Si
E) Mg
6) Which of the following statements about energy is TRUE?
A) Energy is the capacity to do work.
B) Kinetic energy is the energy associated with its position or composition.
C) Energy can not be converted from one type to another.
D) Systems tend to change in order to lower their kinetic energy.
E) The total energy of a system does not remain constant.
6)
7) A covalent bond is best described as
A) the sharing of electrons between atoms.
B) the transfer of electrons.
C) a bond between two polyatomic ions.
D) a bond between a metal and a polyatomic ion.
E) a bond between a metal and a nonmetal.
7)
8) What answer should be reported, with the correct number of significant figures, for the following calculation? (249.362 + 41) / 63.498