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CHM 1020 - Final Exam Study Guide.
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CHM 1020 - Final Exam Study GuideThe quantity 0.0000064 g expressed in scientific notation is ___________. - ANS-6.4 x
10^-6
A substance that can be broken down into 2 or more simpler substances only by
chemical methods is called a(n) - ANS-compound
Which is not a mixture? - ANS-sodium chloride
which substance is an element? - ANS-N2
The majority of new smartphones being released have displays that are at least 5.00
inches in size. What is this size in centimeters? (There are 2.54 cm in one inch.) -
ANS-12.7 cm
which one of the following is a subatomic particle located in the center of the atom and
has a positive charge? - ANS-Proton
What are the three pillars of sustainability? - ANS-Environmental, social, economic
Oxidation and reduction of atoms involves a change in the number of __________ in
the atom. - ANS-Electrons
One of the lightest smartphones on the market today weighs 113 g. To protect your
phone, you may want to use a screen protector, which weighs 27.2 g, and a heavy duty
case which weighs 114 g. What is the total weight of the phone, screen protector, and
case? - ANS-254 g
2.3 x 10^6 meters is the same _________________ meters. - ANS-2,300,000
How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)? -
ANS-Protons: 17
Neutrons: 18
For the Ionic compound NaCl, what is the charge on the sodium ion? - ANS-+ 1
Which of the following is a diatomic molecule: Hydrogen (H2), Aluminum (Al), Sulfur(S8)
or Carbon (C)? - ANS-Hydrogen (H2)
,What is the correct answer to the following problem (w. the correct # of significant
figures)(3..123) + 45.7 = ? - ANS-72
One of the 3 pillars of sustainability, resulting in a better quality of life for all -
ANS-Social
The Atomic # of fluorine - ANS-9
Anything that occupies space and has mass - ANS-matter
Tea would be an example of a - ANS-Homogeneous Mixture
A molecule composed of a metal atom and a nonmetal atom - ANS-Ionic
The quantity 8.7 x10^5 g expressed in a standard decimal notation. - ANS-870,000 g
On a Periodic Table, the column of elements with similar properties are - ANS-groups
The most numerous of the elements are the - ANS-metals
Which is not a pure substance? - ANS-air
Which one of the following is a subatomic particle located in the center of the atom and
has no charge? - ANS-neutrons
A computer chip was weighed and found to have a mass of 23.3040 g. How many
significant figures does this number have? - ANS-6
A substance that can be broken down into two or more simpler substances only by
chemical method is called a - ANS-compound
Which differentiates a compound from a mixture of two or more elements? - ANS-A
compound does not exhibit the individual properties of the elements of which it is
composed
How many protons, neutrons, and electrons are there in a neutral atom of 19/9 F? -
ANS-9, 10, 9
, What distinguishes the atoms of one element from another? - ANS-The number of
protons
Which corresponds to the composition of the ion typically formed by magnesium (Mg)? -
ANS-12 protons, 10 electrons, 2+ charge
How many bromide ion can combined with one ion of aluminum to form an ionic
compound? - ANS-2
Which country is the worlds leading producer of rare earth elements? - ANS-China
A recent set of advertisements has a picture of an aluminum can with an
aluminum-frame bicycle, alone with a hypothetical quote from the can that reads: " I
want to be a bike. Recycle me." The analysis of the life cycle of an item starting with its
raw materials and ending with the used item becoming the raw material for new
products is called - ANS-cradle-to-cradle
One of the lightest smartphones on the market today weighs 113 g. To protect your
phone, you may want to use a screen protector, which weighs 27.2 g, and a heavy duty
phone case, which weighs 114 g. What is the total weight of the phone, screen
protector, and case? - ANS-254
What is the following mathematical operation? (1.42 +9.4) x 2.854 - ANS-30.9
How many cm are in 0.129m ? - ANS-12.9
Which one of the following is an example of a homogeneous mixture? - ANS-a glass of
pulp-free lemonade
Classify each type of matter.
A beaker full ethanol, a mushroom omelet, flat cola, oxygen gas - ANS-ethanol -
compound
mushroom omelet - heterogeneous mixture
flat cola - Homogeneous mixture
Oxygen gas - element
Sheila has a mass of 59,100 grams. Express this mass in scientific notation.
How many significant figures is this?
What is her mass in pounds? - ANS-5.91 x 10^4
3 sig. figs
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