Transcript 1st quarter make up warm-ups

Make Up Warm #1
Hypochlorous acid is related to the anion found in common
household bleach. Which of the following is that common
anion?
1.
2.
3.
4.
ClO4–
ClO3–
ClO2–
ClO–
Make Up Warm Up #2
What is the correct name for this compound? Na2O2
1.
2.
3.
4.
Disodium dioxide
Sodium (I) peroxide
Disodium peroxide
Sodium peroxide
Make Up Warm Up #3
Of the following which provides the most acceptable name
for Cr2O72–?
1.
2.
3.
4.
Dichromium heptoxide
Dichromium heptoxide ion
Chromium (VI) oxide
Dichromate ion
Make Up Warm Up #4
Of the following, which provides the most acceptable name
for Fe2(C2O4)3?
1.
2.
3.
4.
Iron (II) oxalate
Iron (II) oxalate (III)
Iron (III) trioxalate
Iron (III) oxalate
Make Up Warm Up #5
Currently we can measure relative atomic mass using an instrument
known as a mass spectrometer. However, the masses of atoms are still
not reported as whole numbers. What is the chief reason for this?
1. Atoms are so small that even modern techniques have a limited
accuracy that keeps the value from being a whole number.
2. The atomic mass scale is based on carbon-12 and since this
atom does not have a whole number mass the comparisons will
not be able to have whole number mass also.
3. Isotopic abundance is averaged to provide the mass of atoms.
4. Atomic mass units figure in here, but I am not sure how.
Make Up Warm Up #6
Since it is extremely difficult to “see” atoms without elaborate equipment,
chemists rely on the atomic mass scale when we need to determine the
number of atoms in a sample. An analogy for this type of counting
would be as follows: A U.S. nickel coin has a mass of approximately
5.0 grams. How many nickels make up $100? What would be the
mass of the money? (By the way, could you lift $100 worth of
nickels?)
1.
2.
3.
4.
2 000 nickels; 10 000 grams; yes
2 000 nickels; 10 000 grams; probably not
20 000 nickels; 100 000 grams; yes
20 000 nickels; 100 000 grams; not likely