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Cypress Park Spring Final Review 2023 Flashcards | StudBud
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Cypress Park Spring Final Review 2023
Cypress Park Spring Final Review 2023
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atom through stoichiometry
Flashcards
50 cards
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Practice quiz
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Host live
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Questions
50
Answers
1
N
2
+ H
2
--> NH
3
When balanced what is the coefficient for hydrogen?
3
4
1
2
2
Identify which one will have a faster rate?
Mg dust and O2
Mg strips and O2
3
What does this symbol represent?
Deuterium
Protium
Penterium
Tritium
4
What is the chemical formula for strontium oxide
Sr2OSrO
Sr2O2
SrO
SrO2
5
What is the name for N
2
O
3
?
Dinitrogen oxide
Nitrogen oxide
Dinitrogen trioxide
Nitrous oxide
6
Which molecule is pyramidal
H2O
CH4
CO2
NH3
7
The electron dot structure for an element, what do the dots represent?
atoms electrons and protons
The atoms protons
The atoms electrons
The atoms valence electron
8
Which pair will form an ionic bond, and why?
K and He, because one is metal other is noble gas
Li and Cl, one is a metal and the other is a nonmetal
C and I, because both nonmetals
Cl and Br, both are in the same family
9
Which reaction would most likely occur between two elements? What are the likely products
Synthesis: a compound made of two elements
Single-replacement: an element and an ionic compound.
Decomposition: tow or more compounds of the two elements
Synthesis: two elements and water
10
What are three types of subatomic particles
Muons, ions, electrons
Protons, electron, neutrons
Ions, neutrons, nucleus
Protons, electrons, nucleus
11
What is the chemical formula and charge for the chromate ion?
Cr2O72-
Cr4+
CrO3-3
CrO4-2
12
Which reaction is faster?
C2H4 + H2 + Pt(catalyst)-->
C2H4 + H2 -->
13
Which of the following statements is true?
Electrons are - and have a mass of 1 amu
Neutrons are - with a mass of 1 amu
Protons are + and have a mass of 1 amu
The nucleus of atom is + , never has a mass of 1 amu
14
Which is faster reaction?
Fe + O2 at 800 °C
Fe + O2 at 25 °C+
15
How do fission and fusion reactions compare?
Fission is joining and fusion is joining
Fission is joining and fusion is splitting
Fusion is joining and fission is splitting
Fission is splitting and fusion is splitting
16
Which is an advantage of using fusion to produce electricity
All of the above
Low cost, readily available fuel
Waste products that cause minimal harm to the environment
Tremendous amount of energy generated per gram of fuel
17
Which is the correct expression for ΔH?
ΔH(products)
ΔH(products)-ΔH(reactants)
ΔH(reactants)-ΔH(products)
ΔH(reactants)
18
Theoretically, we should make 6.61 grams of copper. The experiment produced 4.65 grams. PY?
40.2%
66.1%
6.61%
70.5%
19
What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p?
3f
3d
2d
4s
20
In the diagram which has the longest wavelength?
Gamma Rays
UV
Visible Spectrum
Radio
21
Interprete: 2K + 2H
2
O --> 2KOH + H
2
1 mol K + 2 mol H2O --> 2 mol KOH + l mol H2
2 mol K + 2 mol H2O --> 2 mol KOH + l mol H2
None
2 mol K + 2 mol H2O --> 2 mol KOH + 2 mol H2
22
What is the shape of the 3p atomic orbital?
sphere
dumbbell
2 dumbbells
bar
23
What is the unit to measure weighted average atomic mass?
angstrom
gram
amu
nanogram
24
What is the IUPAC name for CaCO
3
?
Calcium hydroxide
Calcium carbonic acid
Calcium Acetate
Calcium Carbonate
25
In a chemical reaction, if the number of collisions between particles increases, the
concentrations will increase
reaction rate will not be changed
reaction rate will increase
the reaction rate will decrease
26
What type of compound is Na
3
P
Monoatomic compound
Binary molecular compound
Binary ionic compound
Polyatomic compound
27
Apply the metallic bonding theory to thermal/electrical conductivity:
Tightly packed ions transfer of electrical/thermal energy
moving cations can carry electrical/thermal energy
Freely-moving electrons can carry electrical/thermal energy
Metal cations transfers electrical/thermal energy
28
If 1 egg and 1/3 cup of oil is needed to prepare brownies, how many batches if you had 3 eggs?
3
4
1
2
29
What must be balanced in order to have a balanced chemical equation?
All of the above
The total number of atoms or ions of each element
The total number of molecules
The total volume of all gases
30
What are the charges on ions of elements in group IA, 3A, 5A?
1-, 3-, 5+
1+, 3-, 5+
1+, 3+, 3-
1+, 3+, 5+
31
Why is this reaction exothermic?
CH
4
(g) + 2O
2
(g) --> CO
2
(g) + 2H
2
O(g)
The reaction releases heat as it proceeds
The reaction products are carbon dioxide and water
The reaction involves all gases
The reaction absorbs heat as it proceeds
32
Which type of solid has the highest melting point?
nonmetallic
Ionic
nonionic
covalent
33
Which color of light has the shortest wavelength?
blue
green
yellow
violet
34
Two nitrogen atoms joined by a triple covalent bond. How many dots represent this bond?
4
6
3
8
35
Why do ionic compounds conduct electric current when they are melted or dissolved in water?
None of the above
The ions are free to move
The ions readily gain/lose electrons to become atoms
The ions readily gain/lose electrons to acquire new charges
36
What is the IUPAC name of the base LiOH
Lithium oxygen hydride
Lithium hydroxide
Lithium Oxide Base
Lithium anhydrate
37
Which is not one of the three rules for writing electron configurations for elements?
Aufbau Principle
Pauli Exclusion Principle
Law of Conservation of energy
Hund's Rule
38
How many protons, electrons, and neutrons does an atom with atomic # 50 and mass number 125?
50 neutrons, 50 protons, 75 electrons
75 neutrons, 50 protons, 50 electrons
120 neutrons, 50 protons, 75 electrons
70 neutrons, 75 protons, 50 electrons
39
The nucleus of an atom is
the central core and is composed of protons and neutrons
positively charged and has more protons than neutrons
negatively charged and has a high density
negatively charged with a low density
40
What is electron configuration of Iron
1s22s22p63s23p64s23d9
1s22s22p63s23p64s2d7
1s22s22p63s23p64s23d10
1s22s22p63s23p64s23d6
41
Have 3.4 moles how many moles of hydrogen?
2Al + 6H
2
0 --> 2Al(OH)
3
+ 3H
2
2.3 mol
1.7 mole
5.1 m0l
3.4 mol
42
For which substance is the heat of formation equal to zero?
O2
CH4
O3
Al2O3
43
The molar mass of CO2 is 44 g/mol. A mass of 150g is how many moles?
29.3 mol
3 mol
3.41 mol
106 mol
44
What is the atomic number of 1s
2
2s
2
2p
6
3s
2
3p
6
16
6
8
18
45
What do you know about a chemical reaction if the value of ΔH is positive?
The reaction cannot occur at room temperature
The reaction is endothermic
The reaction occurs without the addition of energy
The reaction is exothermic
46
What is the compound name in diagram
Magnesium Difluoride
Magnesium Fluorine
Magnesium fluoride
Fluorine Magnesium
47
In a reaction, how does an insufficient quantity of a reactant affect the products formed?
It increases the amount of each product
it will limit the amount of one product but not the other
It will limit the amount of each product
It may or may not limit the product
48
What kind of bond is formed when electrons transfer from one atom to another and become ions?
All of the above
Covalent
Metallic
Ionic
49
How many orbitals are in the 4f sublevel?
5
1
3
7
50
What did Thomson contribute to atomic theory?
The discovery that negative particle is called electron
The idea that electrons have quantized amounts of energy
The discovery that negative charge is in core nucleus
The discovery that positive charge is in core nucleus
