Chem 104 Exam 2 Certification Evaluation Tested Questions Full Solution Guide

CHEM 104 EXAM 2 CERTIFICATION EVALUATION TESTED QUESTIONS FULL SOLUTION
GUIDE
CHEM 104 Exam 2 Questions and Answers Verified
Solutions Latest Update 2026/2027

Question:
metalloids

Answer:
semi conductors are _______ A) metalloids. B) halogens C) transition elements. D) metals. E)
nonmetals.



Question:
O3

Answer:
Which of the following is an element and a molecule? A) Air B) He C) CO2 D) C E) O3



Question:
fluorine

Answer:
The ionization energy of chlorine is lower than the ionization energy of ________. A) calcium B)
sodium C) hydrogen D) fluorine E) lithium



Question:
sugar

Answer:
Choose the pure substance from the list below. A) lemonade B) sea water C) air D) sugar E) coffee



Question:

, 305 mg

Answer:
the recommended adult dos of elixophyllin, a drug used to treat asthma is 6.00 mg/kg of body mass.
Calculate the dose in milligrams for a 112 lb person (1 kg= 2.20 lb) A) 305 mg B) 672 mg C) 670
mg D) 300 mg E) 1478 mg



Question:
protons

Answer:
Z is the number of ________ in an atom. A) protons and electrons B) protons D) neutrons E)
protons and neutrons C) electrons



Question:
1.25x 10^3 kL

Answer:
how many kL does a 1.25x10^8 cL sample contain?



Question:
unreactive

Answer:
Noble gases ________. A) react vigorously with water C) are unreactive E) are good conductors of
electricity B) are liquids at room temperature D) melt at high temperatures



Question:
physical change

Answer:
when sugar dissolves in water, this is an example of _________ A) change of shape B) change of
element C) change of size D) physical change E) chemical change