CHEM 1020 COMPLETE LATEST FINAL
GUIDE WITH QUESTIONS AND
CORRECT/VERIFIED ANSWERS
The quantity 0.0000064 g expressed in scientific notation is ___________. - correct answer-✅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) - correct answer-✅compound
Which is not a mixture? - correct answer-✅sodium chloride
which substance is an element? - correct answer-✅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.) - correct answer-✅12.7 cm
which one of the following is a subatomic particle located in the center of the atom and has a positive
charge? - correct answer-✅Proton
What are the three pillars of sustainability? - correct answer-✅Environmental, social, economic
Oxidation and reduction of atoms involves a change in the number of __________ in the atom. - correct
answer-✅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? - correct answer-✅254 g
2.3 x 10^6 meters is the same _________________ meters. - correct answer-✅2,300,000
How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)? - correct answer-
✅Protons: 17
Neutrons: 18
For the Ionic compound NaCl, what is the charge on the sodium ion? - correct answer-✅+ 1
Which of the following is a diatomic molecule: Hydrogen (H2), Aluminum (Al), Sulfur(S8) or Carbon (C)? -
correct answer-✅Hydrogen (H2)
What is the correct answer to the following problem (w. the correct # of significant figures)(3..123) +
45.7 = ? - correct answer-✅72
One of the 3 pillars of sustainability, resulting in a better quality of life for all - correct answer-✅Social
The Atomic # of fluorine - correct answer-✅9
Anything that occupies space and has mass - correct answer-✅matter
Tea would be an example of a - correct answer-✅Homogeneous Mixture
A molecule composed of a metal atom and a nonmetal atom - correct answer-✅Ionic
The quantity 8.7 x10^5 g expressed in a standard decimal notation. - correct answer-✅870,000 g
On a Periodic Table, the column of elements with similar properties are - correct answer-✅groups
The most numerous of the elements are the - correct answer-✅metals
Which is not a pure substance? - correct answer-✅air
Which one of the following is a subatomic particle located in the center of the atom and has no charge? -
correct answer-✅neutrons
A computer chip was weighed and found to have a mass of 23.3040 g. How many significant figures does
this number have? - correct answer-✅6
A substance that can be broken down into two or more simpler substances only by chemical method is
called a - correct answer-✅compound
Which differentiates a compound from a mixture of two or more elements? - correct answer-✅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? - correct answer-✅9,
10, 9
What distinguishes the atoms of one element from another? - correct answer-✅The number of protons
Which corresponds to the composition of the ion typically formed by magnesium (Mg)? - correct answer-
✅12 protons, 10 electrons, 2+ charge
How many bromide ion can combined with one ion of aluminum to form an ionic compound? - correct
answer-✅2
Which country is the worlds leading producer of rare earth elements? - correct answer-✅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 - correct answer-✅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? - correct answer-✅254
What is the following mathematical operation? (1.42 +9.4) x 2.854 - correct answer-✅30.9
How many cm are in 0.129m ? - correct answer-✅12.9
Which one of the following is an example of a homogeneous mixture? - correct answer-✅a glass of
pulp-free lemonade
Classify each type of matter.
A beaker full ethanol, a mushroom omelet, flat cola, oxygen gas - correct answer-✅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? - correct answer-✅5.91 x 10^4
3 sig. figs
130 lbs.
What element has an atomic number of 46? - correct answer-✅Pd - Palladium
How many neutrons does iodine with an atomic mass of 127 have? - correct answer-✅74
How many electrons does iodine 127 have? - correct answer-✅53
True or False, non-metals are shiny, conductive and malleable? - correct answer-✅False
Metalloid - correct answer-✅B, Si, Ge, As, Sb, and Te
Assign each half reaction as oxidation or reduction:
Na --> Na^+ + e^-
O2 + 4e^- --> 2O^2- - correct answer-✅Oxidation
Reduction
What is the molar mass of MgSO4? - correct answer-✅120.371 g
What is the percent by mass of magnesium in MgSO4? - correct answer-✅20.3%
What is the percent by mass of Oxygen in H2O? - correct answer-✅88.8%
Sublimation is an example of what phase of matter being converted to what other phase of matter? -
correct answer-✅solid phase to the gas phase
An upholstery company the chemical used in their dyes and their process of dyeing and designing
upholstery. Optimizing this chemistry changed the mill's water release, which became cleaner than the
GUIDE WITH QUESTIONS AND
CORRECT/VERIFIED ANSWERS
The quantity 0.0000064 g expressed in scientific notation is ___________. - correct answer-✅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) - correct answer-✅compound
Which is not a mixture? - correct answer-✅sodium chloride
which substance is an element? - correct answer-✅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.) - correct answer-✅12.7 cm
which one of the following is a subatomic particle located in the center of the atom and has a positive
charge? - correct answer-✅Proton
What are the three pillars of sustainability? - correct answer-✅Environmental, social, economic
Oxidation and reduction of atoms involves a change in the number of __________ in the atom. - correct
answer-✅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? - correct answer-✅254 g
2.3 x 10^6 meters is the same _________________ meters. - correct answer-✅2,300,000
How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)? - correct answer-
✅Protons: 17
Neutrons: 18
For the Ionic compound NaCl, what is the charge on the sodium ion? - correct answer-✅+ 1
Which of the following is a diatomic molecule: Hydrogen (H2), Aluminum (Al), Sulfur(S8) or Carbon (C)? -
correct answer-✅Hydrogen (H2)
What is the correct answer to the following problem (w. the correct # of significant figures)(3..123) +
45.7 = ? - correct answer-✅72
One of the 3 pillars of sustainability, resulting in a better quality of life for all - correct answer-✅Social
The Atomic # of fluorine - correct answer-✅9
Anything that occupies space and has mass - correct answer-✅matter
Tea would be an example of a - correct answer-✅Homogeneous Mixture
A molecule composed of a metal atom and a nonmetal atom - correct answer-✅Ionic
The quantity 8.7 x10^5 g expressed in a standard decimal notation. - correct answer-✅870,000 g
On a Periodic Table, the column of elements with similar properties are - correct answer-✅groups
The most numerous of the elements are the - correct answer-✅metals
Which is not a pure substance? - correct answer-✅air
Which one of the following is a subatomic particle located in the center of the atom and has no charge? -
correct answer-✅neutrons
A computer chip was weighed and found to have a mass of 23.3040 g. How many significant figures does
this number have? - correct answer-✅6
A substance that can be broken down into two or more simpler substances only by chemical method is
called a - correct answer-✅compound
Which differentiates a compound from a mixture of two or more elements? - correct answer-✅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? - correct answer-✅9,
10, 9
What distinguishes the atoms of one element from another? - correct answer-✅The number of protons
Which corresponds to the composition of the ion typically formed by magnesium (Mg)? - correct answer-
✅12 protons, 10 electrons, 2+ charge
How many bromide ion can combined with one ion of aluminum to form an ionic compound? - correct
answer-✅2
Which country is the worlds leading producer of rare earth elements? - correct answer-✅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 - correct answer-✅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? - correct answer-✅254
What is the following mathematical operation? (1.42 +9.4) x 2.854 - correct answer-✅30.9
How many cm are in 0.129m ? - correct answer-✅12.9
Which one of the following is an example of a homogeneous mixture? - correct answer-✅a glass of
pulp-free lemonade
Classify each type of matter.
A beaker full ethanol, a mushroom omelet, flat cola, oxygen gas - correct answer-✅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? - correct answer-✅5.91 x 10^4
3 sig. figs
130 lbs.
What element has an atomic number of 46? - correct answer-✅Pd - Palladium
How many neutrons does iodine with an atomic mass of 127 have? - correct answer-✅74
How many electrons does iodine 127 have? - correct answer-✅53
True or False, non-metals are shiny, conductive and malleable? - correct answer-✅False
Metalloid - correct answer-✅B, Si, Ge, As, Sb, and Te
Assign each half reaction as oxidation or reduction:
Na --> Na^+ + e^-
O2 + 4e^- --> 2O^2- - correct answer-✅Oxidation
Reduction
What is the molar mass of MgSO4? - correct answer-✅120.371 g
What is the percent by mass of magnesium in MgSO4? - correct answer-✅20.3%
What is the percent by mass of Oxygen in H2O? - correct answer-✅88.8%
Sublimation is an example of what phase of matter being converted to what other phase of matter? -
correct answer-✅solid phase to the gas phase
An upholstery company the chemical used in their dyes and their process of dyeing and designing
upholstery. Optimizing this chemistry changed the mill's water release, which became cleaner than the
