Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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name: ____________ period: _____ date: ___________ tarea de identificac…
### 1) c. Identificación de la molécula #### Explicación: La estructura muestra un átomo de carbono (\( \text{C} \)) enlazado a dos átomos de cloro (\( \text{Cl} \)) y dos de hidr…
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label the elements fill in the missing atomic numbers and symbols. writ…
1. Atomic number: 20; Name: Calcium 2. Symbol: C; Name: Carbon 3. Atomic number: 29; Name: Copper 4. Symbol: H; Name: Hydrogen 5. Atomic number: 26; Name: Iron 6. Atomic number: 1…
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fill in the missing atomic numbers and symbols. write the names in the …
1. Atomic number: 6, Name: Carbon 2. Symbol: Fe, Name: Iron 3. Atomic number: 1, Name: Hydrogen 4. Symbol: Cu, Name: Copper 5. Atomic number: 2, Name: Helium 6. Atomic number: 79,…
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answer the following questions. the rhyme scheme in the first stanza is…
A. aabb
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the reaction shifts to the right (products). what happens to the amount…
The amount of \(O_2\) goes down.
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which direction does this reaction shift when so₃ is removed? 2so₂(g) +…
The reaction shifts right or to products.
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the reaction shifts to the left (reactants). what happens to the amount…
The amount of \(NO_2\) goes down.
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which direction does this reaction shift when no gas is removed from th…
The reaction shifts left or to reactants.
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the reaction shifts to the right (products). what happens to the amount…
The amount of HI goes up.
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which direction does this reaction shift when more i₂ is added? 51.8 kj…
The reaction shifts right or to products.
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which of these represents the rate of reaction at equilibrium? the reve…
The forward and reverse reactions move at the same rate.
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reaction: 2j ⇌ j₂ concentration (m) time (sec) which line represents th…
line A
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which of these is a condition for dynamic equilibrium? the reaction mus…
The reaction must be reversible (can go forward and backward).
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what is the law of mass action for the reaction below? a ⇌ b k = a/b k …
The third option (where \( K = \frac{[B]}{[A]} \))
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which statement about catalysts is false? some catalysts change the way…
B. Catalysts share the same role as inhibitors
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what change causes the reaction to change from the curve labeled c to t…
D. A catalyst is added to the system.
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what is the purpose of a catalytic converter in a car? it catalyzes the…
B. It catalyzes the reactions that make car emissions less dangerous. (Note: Assuming the second option is labeled B; if the original options had different labels, adjust accordin…
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which combination of factors will result in the fastest reaction rate? …
1.0 M HCl at 35 °C with Zn powder
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which of the following is an important factor in collision theory? lust…
B. molecular orientation
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which combination of factors would result in the fastest reaction rate?…
2.0 M nitric acid at 55° C with a silver ribbon
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which one of the following factors will decrease (slow down) the rate o…
A. Reducing the surface area of solid reactants.
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according to the graph, what happens to the concentration of a over tim…
B. A decreases faster than \( A_2 \) increases.
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11. what are three common varieties of sedimentary rock?
The three common varieties of sedimentary rock are clastic sedimentary rocks (e.g., sandstone), chemical sedimentary rocks (e.g., limestone), and organic sedimentary rocks (e.g., …
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the reaction shifts right or toward the products when hcl is removed. w…
$\ce{H_{2}}$ and $\ce{Cl_{2}}$ (the second option, e.g., if the options were labeled, it would be the one with $\ce{H_{2}}$ and $\ce{Cl_{2}}$)
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what direction will the equilibrium shift when hcl is removed from the …
shifts right or shifts to products
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a poem’s, such as diction and enjambment, create the, or overall atmosp…
First blank: poetic elements Second blank: mood
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2 to 3 paragraphs, compare and contrast design methods used in traditio…
Traditional animation uses manual, hand - drawn frame creation with physical materials (e.g., paper, ink), is time - consuming but has an organic aesthetic. Digital animation uses…
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the reaction shifts left or toward the reactants when hcl is added. whi…
$\ce{H_{2}}$ and $\ce{Cl_{2}}$ (the option with "H₂ and Cl₂")
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the reaction shifts left or toward the reactants when hcl is added. whi…
$\ce{H2}$ and $\ce{Cl2}$
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what direction will the equilibrium shift when hcl is added to the reac…
shifts left or shifts to reactants
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choose the correct word or term for each statement. write your choice i…
expand ### 2.
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reaction: 2j ⇌ j₂ concentration (m) time (sec) which line represents th…
line A
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reaction: g ⇌ f concentration (m) products reactants time (sec) what do…
The reaction has more products and is product favored (K>1).
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which of these examples represents a system at equilibrium? three fish …
B. In a sealed flask, 500 water molecules vaporize while 500 other water molecules condense.
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which of these represents the rate of reaction at equilibrium? the forw…
A. The forward and reverse reactions move at the same rate.
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which of these is a condition for dynamic equilibrium? the reaction mus…
The reaction must be reversible (can go forward and backward).
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which statement about inhibitors is true? inhibitors only work at high …
Inhibitors slow down the rate of reaction.
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which statement about catalysts is true? catalysts always change states…
B. Catalysts increase the rate of the reaction.
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what type of material does this image represent? solid catalyst enzyme …
B. enzyme catalyst
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which statement about catalysts is false? some catalysts change the way…
C. Catalysts share the same role as inhibitors.
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which statement about catalysts is true? catalysts increase the activat…
B. Catalysts are not used up during the reaction
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which combination of factors would result in the fastest reaction rate?…
A. 3.0 M nitric acid at 68° C with silver powder
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which combination of factors would result in the fastest reaction rate?…
2.0 M nitric acid at 55° C with a silver ribbon
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chalk makes bubbles when it reacts with vinegar. what is the temperatur…
\(32^{\circ}\text{C}\)
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which acid solution will react the fastest with a 1 cm piece of mg ribb…
The acid solution with a concentration of 2.0 M (the right - most flask with "2.0 M" label) will react the fastest with the 1 cm piece of Mg ribbon.
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which combination of factors would result in the slowest reaction rate?…
1.0 M nitric acid at 20° C with a silver ribbon
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according to the graph, what happens to the concentration of e over tim…
It decreases and then levels out.
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according to the graph, what happens to the concentration of a₂ over ti…
It increases and then levels out.
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according to the graph, what part(s) of the reaction are present at the…
Only the reactant, A, is present.
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the energy produced by the snack in an experiment is calculated to be 1…
\( 3.57 \) (or more precisely, if we calculate \( \frac{14928}{4.18\times1000}=\frac{14928}{4180}\approx 3.57 \))
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energy diagram energy reaction progress what is the correct sign conven…
positive ($+\Delta H$)
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energy diagram energy reaction progress what does line e represent? act…
enthalpy of reaction
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the temperature of a thermometer decreases during a chemical reaction. …
. The reaction absorbs energy (+ or endothermic).
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a bunsen burner flame is a combustion reaction whose heat energy can be…
First Law of Thermodynamics
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dissolving an ionic compound in water usually results in an increase in…
D. Second Law of Thermodynamics
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what term describes the gain or loss of energy when bonds are made or b…
A. enthalpy
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the energy produced by the snack in an experiment is calculated to be 1…
\( 3.57 \) (or approximately, depending on rounding during calculation)
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how much energy does the water in this experiment absorb according to t…
\(10450\)
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what is the mass of an iridium sample which absorbs 894 j of energy whe…
$\approx 55.9\ g$ (or more precisely around 55.91 g)
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a calorimeter absorbs 36,200 j of energy from the snack shown in the da…
\( \approx 27846.15 \)
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how much energy does the water in this experiment absorb according to t…
2508
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exit ticket name: class: what is the atomic number and atomic mass of b…
The atomic number of Boron is 5, and the atomic mass of Boron is approximately 10.81 (atomic mass units).
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which of these is not a possible reason why the energy calculated from …
The energy goes into your stomach.
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periodic table worksheet to accomplish, you need the following informat…
(Example filled cells, showing one as sample: For "Be" cell: Atomic Number = 4, Element Name = Beryllium, Atomic Mass = 9.012. Full completion requires using periodic table for ea…
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periodic table worksheet the periodic table contains the following info…
(Example for first tile: Be - Atomic Number: 4, Element Name: Beryllium, Atomic Mass: 9.012; Repeat for each tile with correct info from periodic table.)
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11. apply concepts write and balance equations for the following reacti…
$\boldsymbol{\ce{2Fe + 3Cl2 -> 2FeCl3}}$ ### Part b
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independent practice: classifying elements directions: read the propert…
Most difficult element (example): Element 3, because its properties (somewhat conducts electricity, little malleability) blur the line between metal and metalloid. Most confident …
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energy diagram energy reaction progress what does line c represent? tra…
enthalpy of reaction (the option: enthalpy of reaction)
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element 7 - found along the stair - step line of the periodic table cla…
To answer the questions: 1. Most difficult to classify: Element 7. Reason: Elements along the stair - step line are metalloids, which have properties of both metals and non - meta…
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independent practice: classifying elements directions: read the propert…
Element 1: Classification - Metal, Confidence - 5 Element 2: Classification - Nonmetal, Confidence - 5 Element 3: Classification - Metalloid, Confidence - 4 Element 4: Classificat…
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10. apply concepts balance the following equations: a. so₂(g) + o₂(g) —…
\(2SO_2(g) + O_2(g) ightarrow 2SO_3(g)\) ### Part b:
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9. describe write skeleton equations for these reactions. a. heating co…
s: a. $\boldsymbol{\ce{CuS(s) + O2(g) ->[\Delta] Cu(s) + SO2(g)}}$ b. $\boldsymbol{\ce{NaHCO3(s) ->[\Delta] Na2CO3(s) + CO2(g) + H2O(l)}}$
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aks 3f metal reactivity reactivity increases to ______ & ______ the mos…
### Metal Reactivity Section: - Reactivity increases to the **left** and **down** (on the periodic table). - The most reactive metal family are the **alkali metals (Group 1)**. Th…
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guided practice: classify the elements for each element below, review i…
Element 1 (Iron): Metal Element 2 (Sulfur): Nonmetal Element 3 (Silicon): Metalloid Element 4 (Copper): Metal Element 5 (Oxygen): Nonmetal Element 6 (Boron): Metalloid
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energy diagram energy reaction progress what does line a represent? ene…
energy of the reactants
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energy diagram what is the correct sign convention for the overall ener…
positive (+ΔH)
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energy diagram energy reaction progress what type of energy change is r…
exothermic
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energy diagram energy reaction progress what does line b represent? tra…
energy of the reactants
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energy diagram energy reaction progress what does line e represent? ene…
enthalpy of reaction
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is the following chemical equation balanced? 3h₂ + n₂ ---> 2nh₃ no, bec…
Yes, because each element has the same number on each side of the equation (the option with this explanation)
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in a reaction a + b ---> c, reactant a has 5g and product c has 9g. how…
4g (corresponding to the 4g option)
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if a chemical reaction occurs in an open system (not contained), what m…
the measurable mass might decrease because any gas produced can escape (the actual mass would stay the same)
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not able to conduct heat or electricity, little to no metallic luster a…
Non - metals
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the electrons in the outermost shell (main energy level) of an atom; th…
valence electrons
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if a chemical reaction occurs in a closed system (no way for any part o…
the mass would stay the same
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multiple-choice question do elements in group 1 tend to lose or gain el…
B. lose 1 electron (assuming the second option is labeled as B; if the options are just the two with the second being "lose 1 electron", then the correct choice is the "lose 1 ele…
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multiple-choice question what is ionization energy? the atoms tendency …
The energy required to remove a valence electron from an atom (the second option)
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why does atomic radius decrease as you go across a period from left to …
A. Because there are more protons in the nucleus of the atoms as you go from left to right so there is a stronger pull on the electrons
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what happens to the atomic radius as you move across a period from left…
The option "It decreases" (the third option with the label "It decreases") is correct.
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multiple-choice question why does atomic radius increase as you go down…
A. Because you add energy levels (shells)
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multiple-choice question what is the trend in atomic size as you procee…
C. It increases (assuming the options are labeled A, B, C as "It decreases", "It stays the same", "It increases" respectively; if the third option's identifier is different, adjus…
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io₃⁻(aq) + hso₃⁻(aq) → i⁻(aq) + so₄²⁻(aq) which of the following proper…
- Coefficient of \( IO_3^-(aq) \): 1 - Coefficient of \( HSO_3^-(aq) \): 3 - Coefficient of \( I^-(aq) \): 1 - Coefficient of \( SO_4^{2-}(aq) \): 3
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multiple-choice question what are valence electrons? electrons in the o…
A. electrons in the outer most shell (energy level)
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fr and f form a(n) ______ bond because the electronegativities are so d…
ionic (the option with the label "ionic")
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assignment: post-course assessment questions fa9pl10h.post.15m 13. 14. …
d. When the value of pH is 7, two messages will be displayed.
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a small electronegativity means atoms share electrons somewhat equally …
C. nonpolar covalent bond (assuming the options are labeled A, B, C as ionic bond, polar covalent bond, nonpolar covalent bond respectively; if the original options have different…
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name periodic table review ans: color\tcolumn #\tfamily name\tcolor\tco…
The periodic table is labeled by identifying metals (left/middle), non - metals (right), metalloids (staircase), and assigning valence electrons (e.g., Group 1: 1, Group 2: 2, Gro…
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video discussion guide questions. 1. what is an atom? 2. what are the p…
1. An atom is the basic unit of matter, the smallest particle of an element that retains its chemical properties, consisting of a nucleus (with protons and neutrons) and electrons…
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describe the symmetries of each molecule shown a. benzene b. water c. h…
A. The benzene molecule has \(\boldsymbol{6}\) line(s) of symmetry, point symmetry, and the following rotational symmetry(ies) \(\boldsymbol{60, 120, 180, 240, 300}\)° (Note: The …
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while looking at bromine (br) on the periodic table, a student needs to…
There are many possible elements, and they are all in the same vertical column as bromine.