CHEM 1305 TTU EXAM 3 CERTIFICATION EVALUATION 2026 FULL QUESTIONS AND CORRECT ANSWERS

CHEM 1305 TTU EXAM 3 CERTIFICATION
EVALUATION 2026 FULL QUESTIONS AND
CORRECT ANSWERS

◉ Which of the following elements would be the most
electronegative?
Answer: a) Cl


◉ The electron geometry of NH3 is
Answer: c) tetrahedral


◉ An alcoholic solution contains 50% ethanol (C2H6O), 5%
methanol (CH4O), 5% isopropanol (C3H8O), 40% water (H2O).
What is the solvent of this solution?
Answer: a) water


◉ If you have 500 ml of a 5 M solution, how many moles of solute
are in the solution?
Answer: e) 2.5 mol


◉ Which of the following compounds would have Cl- ions?
I.KCl II.CCl4 III.AlCl3 IV.Cl2

, Answer: a) I, III


◉ Which of the following molecules has polar bonds, but the
molecule is nonpolar?
Answer: b) CO2


◉ How many covalent bonds are in a molecule of HCN?
Answer: d) 4


◉ What is the molarity of the solution if you dissolve 117 grams of
NaCl into 2 liters?
Answer: a) 1M


◉ When temperature increases, the solubility of a salt in water
will_____, while the solubility of a gas will_____.
Answer: c) increase, decrease


◉ Which of the following molecules does not have the same electron
geometry as the others?
Answer: b) SiO2


◉ When oxygen dissolves in water, the attraction between water
molecule and oxygen molecule is