CHEM 121 QUIZ 2 QUESTIONS & ACCURATE ANSWERS PASSED ALREADY GRADED A+

CHEM 121 QUIZ 2 QUESTIONS &
ACCURATE ANSWERS PASSED
ALREADY GRADED A+
What is the meaning of the two (2) in ethyl alcohol, c2h5OH?
A. all alcohol molecules contain two carbon atoms
b. there are two carbon atoms per molecule of ethyl alcohol
c. carbon is diatomic
d. all of these are correct statements - Correct Answer ✔✔ b. there are two carbon
atoms per molecule of ethyl alcohol

Which of the following uses the unit of "u" or "amu"?
a. atomic weights of atoms
b. relative masses of atoms
c. molecular weights of molecules
d. more than one response is correct - Correct Answer ✔✔ d. more than one response
is correct

Determine the molecular weight of hydrogen peroxide, H2O2, in u (or amu)
a. 17.01
b. 18.02
c. 34.02
d. 33.01 - Correct Answer ✔✔ c. 34.02

The average relative mass of an ozone molecule is 48.0 u. An ozone molecule contains
only oxygen atoms. What does this molecular weight indicate about the formula of the
ozone molecule - Correct Answer ✔✔ c. it is triatomic

which of the following pairs are about equal in mass?
a. proton and electron
b. electron and neutron
c. proton and neutron
d. nucleus and surrounding electrons - Correct Answer ✔✔ c. proton and neutron

which of the following particles is the smallest?
a. proton
b. electron
c. neutron
d. they are all the same sizes - Correct Answer ✔✔ b. electron

which of the following carries a negative charge?
a. a proton