CHM 113 TEST BANK 2026 EXAM REVIEW WITH SOLVED QUESTIONS GRADED A+CHM 113 TEST BANK 2026 EXAM REVIEW WITH SOLVED QUESTIONS GRADED A+

CHM 113 TEST BANK 2026 EXAM REVIEW WITH
SOLVED QUESTIONS GRADED A+


◉ Predict the chemical formula for the ionic compound formed by Cu²⁺
and P³⁻. Answer: Cu3P2


◉ Balance the following chemical equation (if necessary): MnO2 (s) +
HCl (aq) -> MnCl2 (aq) + H2O (l) + Cl2 (g). Answer: MnO2 (s) + 4 HCl
(aq) -> MnCl2 (aq) + 2 H2O (l) + Cl2 (g)


◉ The following picture would be best described as. Answer: A gaseous
compound


◉ Which of the following is a physical change. Answer: Tearing a piece
of paper


◉ What is the mass number for an atom of zinc containing 30 protons
and 36 neutrons. Answer: 66


◉ What is the mass percentage of Na in NaNO₃? Provide an answer to
two decimal places.. Answer: 27.04%

, ◉ A chemist encounters an unknown metal. They drop the metal into a
graduated cylinder containing water, and find the volume change is 4.1
mL. If the metal weighs 5.1 g, what is the density of the metal in g/mL.
Answer: 1.2 g/mL


◉ In the reaction between HNO₃ and Ba(OH)₂ (assume complete
reaction of the Ba(OH)₂), the spectator ions are
A) Ba²⁺ and NO₃⁻
B) H⁺ and NO₃⁻
C) H⁺ and OH⁻
D) Ba²⁺ and OH⁻. Answer: A) Ba²⁺ and NO₃⁻


◉ An unknown element X has the following isotopes: ²⁵X (80.50%
abundant, mass = 25.03 amu) and ²⁷X (19.50% abundant, mass = 26.98
amu). What is the average atomic mass of X in amu. Answer: 25.40 amu


◉ Determine the formula weight of SrCl₂. Provide an answer to two
decimal places.. Answer: 158.52 amu


◉ Balance the following chemical equation (if necessary): H2SO4 (aq)
+ Pb(OH)4 (s) -> Pb(SO4)2 (s) + H2O (l). Answer: 2 H2SO4 (aq) +
Pb(OH)4 (s) -> Pb(SO4)2 (s) + 4 H2O (l)


◉ Which of the following is an example of an empirical formula?