CHM 113 FINAL EXAM QUESTIONS & ANSWERS
Which of the following substances is classified as a homogeneous mixture?
(a) A sample of solid bronze
(b) Orange juice with pulp
(c) A carbonated soda
(d) Pure H2O
(e) A mixture that is only legally recognized in 12 states - Answer -(a) A sample of solid
bronze
What is the SI unit of length?
(a) inch
(b) centimeter
(c) meter
(d) mile
(e) kilometer - Answer -(c) meter
The wavelength of a red laser pointer is 632.8 nanometers (nm). What is this
wavelength in
micrometers (µm)?
(a) 6.328 x 10⁻¹
µm
(b) 6.328 x 10⁵
µm
(c) 6.328 x 10⁻⁵
µm
(d) 6.328 x 10⁶
µm
(e) 6.328 x 10⁴
µm - Answer -(a) 6.328 x 10⁻¹
µm
What is the oxidation number of the phosphorous atom in the polyatomic ion, phosphate
(PO43-)?
(a) + 3
(b) - 3
(c) + 5
(d) + 1
(e) - 4 - Answer -(c) + 5
What is the chemical formula of perchloric acid?
(a) HCl
(b) CH₃COOH
(c) H₃PO₄
, (d) HClO₄
(e) HClO₃ - Answer -(d) HClO₄
What is the name of the compound, NiBr2?
(a) Nickel (II) bromide
(b) Nickel bromide
(c) Mononickel dibromide
(d) Nickel dibromide
(e) Nickel McBromide, the 2nd - Answer -(a) Nickel (II) bromide
What is the chemical formula of the compound, potassium permanganate?
(a) KMnO₂
(b) KMg
(c) KClO₄
(d) KMnO₄
(e) KMgO₂ - Answer -(d) KMnO₄
What is the likely chemical formula of the compound formed between silver and
nitrogen?
(a) AgN
(b) Ag₃N
(c) AgN₃
(d) Ag₂N₃
(e) Ag₃N₂ - Answer -(b) Ag₃N
16) Which of the following compounds exhibits polar covalent bonding?
(a) O₂
(b) CaBr₂
(c) PCl₅
(d) NaCl
(e) The Yeti that stole your Wheat Thins last night - Answer -(c) PCl₅
Which of the following statements about isotopes is false?
(a) All isotopes of the same element have the same number of protons
(b) Isotopes of the same element have different masses due to a different number of
neutrons
(c) Only one isotope of each element occurs naturally
(d) The atomic mass of an element on the periodic table is determined by multiplying
the mass of each
naturally occurring isotope by its percent natural abundance and adding them together
(e) ¹³C has the same number of electrons as ¹⁴C - Answer -(c) Only one isotope of each
element occurs naturally
Paying attention in lecture question! During our Ch. 2
lecture, we watched a video clip from an old movie. In the
screenshot of this movie pictured below, what are the
Which of the following substances is classified as a homogeneous mixture?
(a) A sample of solid bronze
(b) Orange juice with pulp
(c) A carbonated soda
(d) Pure H2O
(e) A mixture that is only legally recognized in 12 states - Answer -(a) A sample of solid
bronze
What is the SI unit of length?
(a) inch
(b) centimeter
(c) meter
(d) mile
(e) kilometer - Answer -(c) meter
The wavelength of a red laser pointer is 632.8 nanometers (nm). What is this
wavelength in
micrometers (µm)?
(a) 6.328 x 10⁻¹
µm
(b) 6.328 x 10⁵
µm
(c) 6.328 x 10⁻⁵
µm
(d) 6.328 x 10⁶
µm
(e) 6.328 x 10⁴
µm - Answer -(a) 6.328 x 10⁻¹
µm
What is the oxidation number of the phosphorous atom in the polyatomic ion, phosphate
(PO43-)?
(a) + 3
(b) - 3
(c) + 5
(d) + 1
(e) - 4 - Answer -(c) + 5
What is the chemical formula of perchloric acid?
(a) HCl
(b) CH₃COOH
(c) H₃PO₄
, (d) HClO₄
(e) HClO₃ - Answer -(d) HClO₄
What is the name of the compound, NiBr2?
(a) Nickel (II) bromide
(b) Nickel bromide
(c) Mononickel dibromide
(d) Nickel dibromide
(e) Nickel McBromide, the 2nd - Answer -(a) Nickel (II) bromide
What is the chemical formula of the compound, potassium permanganate?
(a) KMnO₂
(b) KMg
(c) KClO₄
(d) KMnO₄
(e) KMgO₂ - Answer -(d) KMnO₄
What is the likely chemical formula of the compound formed between silver and
nitrogen?
(a) AgN
(b) Ag₃N
(c) AgN₃
(d) Ag₂N₃
(e) Ag₃N₂ - Answer -(b) Ag₃N
16) Which of the following compounds exhibits polar covalent bonding?
(a) O₂
(b) CaBr₂
(c) PCl₅
(d) NaCl
(e) The Yeti that stole your Wheat Thins last night - Answer -(c) PCl₅
Which of the following statements about isotopes is false?
(a) All isotopes of the same element have the same number of protons
(b) Isotopes of the same element have different masses due to a different number of
neutrons
(c) Only one isotope of each element occurs naturally
(d) The atomic mass of an element on the periodic table is determined by multiplying
the mass of each
naturally occurring isotope by its percent natural abundance and adding them together
(e) ¹³C has the same number of electrons as ¹⁴C - Answer -(c) Only one isotope of each
element occurs naturally
Paying attention in lecture question! During our Ch. 2
lecture, we watched a video clip from an old movie. In the
screenshot of this movie pictured below, what are the
