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CHM 1020 - Final Exam Study Guide questions and answers graded A+ by experts 2024/2025
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CHM 1020 - Final Exam Study GuideThe quantity 0.0000064 g expressed in scientific notation is ___________. - ANS6.4 x 10^-6
A substance that can be broken down into 2 or more simpler substances only by chemical
methods is called a(n) - ANScompound
Which is not a mixture? - ANSsodium chloride
which substance is an element? - ANSN2
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.) - ANS12.7 cm
which one of the following is a subatomic particle located in the center of the atom and has a
positive charge? - ANSProton
What are the three pillars of sustainability? - ANSEnvironmental, social, economic
Oxidation and reduction of atoms involves a change in the number of __________ in the atom. -
ANSElectrons
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? - ANS254 g
2.3 x 10^6 meters is the same _________________ meters. - ANS2,300,000
How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)? -
ANSProtons: 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)? - ANSHydrogen (H2)
What is the correct answer to the following problem (w. the correct # of significant figures)(3.2 /
0.123) + 45.7 = ? - ANS72
One of the 3 pillars of sustainability, resulting in a better quality of life for all - ANSSocial
,The Atomic # of fluorine - ANS9
Anything that occupies space and has mass - ANSmatter
Tea would be an example of a - ANSHomogeneous Mixture
A molecule composed of a metal atom and a nonmetal atom - ANSIonic
The quantity 8.7 x10^5 g expressed in a standard decimal notation. - ANS870,000 g
On a Periodic Table, the column of elements with similar properties are - ANSgroups
The most numerous of the elements are the - ANSmetals
Which is not a pure substance? - ANSair
Which one of the following is a subatomic particle located in the center of the atom and has no
charge? - ANSneutrons
A computer chip was weighed and found to have a mass of 23.3040 g. How many significant
figures does this number have? - ANS6
A substance that can be broken down into two or more simpler substances only by chemical
method is called a - ANScompound
Which differentiates a compound from a mixture of two or more elements? - ANSA 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? - ANS9, 10, 9
What distinguishes the atoms of one element from another? - ANSThe number of protons
Which corresponds to the composition of the ion typically formed by magnesium (Mg)? - ANS12
protons, 10 electrons, 2+ charge
How many bromide ion can combined with one ion of aluminum to form an ionic compound? -
ANS2
Which country is the worlds leading producer of rare earth elements? - ANSChina
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 - ANScradle-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? - ANS254
What is the following mathematical operation? (1.42 +9.4) x 2.854 - ANS30.9
How many cm are in 0.129m ? - ANS12.9
Which one of the following is an example of a homogeneous mixture? - ANSa glass of pulp-free
lemonade
Classify each type of matter.
A beaker full ethanol, a mushroom omelet, flat cola, oxygen gas - ANSethanol - 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? - ANS5.91 x 10^4
3 sig. figs
130 lbs.
What element has an atomic number of 46? - ANSPd - Palladium
How many neutrons does iodine with an atomic mass of 127 have? - ANS74
How many electrons does iodine 127 have? - ANS53
True or False, non-metals are shiny, conductive and malleable? - ANSFalse
Metalloid - ANSB, Si, Ge, As, Sb, and Te
Assign each half reaction as oxidation or reduction:
Na --> Na^+ + e^-
O2 + 4e^- --> 2O^2- - ANSOxidation
Reduction
What is the molar mass of MgSO4? - ANS120.371 g
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