Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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2. which aspect of bernini’s work greatly influenced the baroque period…
b. Dramatic realism
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complete the chemical equation so that it supports the law of conservat…
### Part 1: Completing the Chemical Equation To balance the equation \( \text{CO}_2 + 6\text{H}_2\text{O} ightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \), we check th…
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c₆h₁₂o₆ + 6o₂ → 6co₂ + 6h₂o + energy 11. in the above chemical reaction…
$\ce{C6H12O6}$ (Glucose) and $\ce{O2}$ (Oxygen) ### Part b
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5. if the alka seltzer was added to water in a closed container, would …
The mass of the container would remain the same.
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of covalent bonds an atom can form usually equals the number of electro…
The structure \( \text{H}-\text{C}=\text{C}-\text{O} \) fails chemically because: - **Carbon atoms**: Each C needs 4 covalent bonds for stability. The left C has 1 (from H) + 2 (f…
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7. fill in the following table: | atom | # of valence electrons | # of …
The filled table is as shown above.
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which one is the dependent variable? time to dissolve water temperature…
Time to dissolve
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chapter 3 review questions 3.1 using and expressing measurements 1. thr…
### Question 1: Analyzing Accuracy and Precision for Each Student #### Colin: - **Precision**: Colin's measurements (47.13, 47.94, 46.83, 47.47) are spread out (range = 47.94 - 46…
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2. i like my coffee sweet, so i add a tablespoon of sugar to my cup of …
The "cup of coffee" now is made up of coffee (with its solutes), water, and dissolved sugar. Yes, it is a mixture (specifically a solution, as sugar dissolves in the aqueous coffe…
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6. diagram the electron distribution of each of the following atoms and…
### Step-by-Step Explanation for Electron Distribution and Reactivity Analysis #### 1. Electron Distribution Basics Electrons fill energy levels (shells) around the nucleus. The f…
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14. when ammonium nitrate (nh₄no₃) explodes, the products are nitrogen,…
18 grams of water would be formed.
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9. the will the house by right to my eldest son! khotso, may your home …
(a) estate; (c) children ### 2. (a) Identifying the figure of speech (example - assume simile for illustration)
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5. if the alka seltzer was added to water in a closed container, would …
### Claim: When Alka - Seltzer is added to water in a closed container, the mass of the container and its contents remains the same. ### Evidence: 1. The law of conservation of ma…
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2. sep use models based on observations of your model, which option is …
c. A compound is made up of two or more types of atoms. ### Question 3
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₁₅³¹p³⁻ element: _____________ atomic #: _____________ # electrons:____…
For $_{15}^{31}P^{3-}$: - element: Phosphorus - atomic #: 15 - # electrons: 18 - atomic mass: 31 For $_{10}^{21}Ne$: - element: Neon - atomic #: 10 - # electrons: 10 - # neutrons:…
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chemistry—unit 2 worksheet 3 problems 1 and 2. calculate the pressure o…
687 mmHg ### Problem 1b:
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which of the following mediums is made from a mix of carbon and clay? a…
C. pencil
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a scientist performed an experiment that had an unexpected result. befo…
The scientist wanted to be sure the results were accurate.
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6. infer yuri conducted an experiment on three metal samples. she creat…
B. Sample #1 is iron; sample #2 is magnesium; sample #3 is aluminum.
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matter is composed of small particles - atoms or molecules - that are i…
scientific theory
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section 2.1 review (pg. 74 - 91) 1. what is a foodborne illness? 2. wha…
A foodborne illness is an illness resulting from consuming food or drink contaminated with harmful agents (microorganisms, chemicals, toxins), causing symptoms like digestive issu…
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energy cannot be created. energy cannot be destroyed. energy can only c…
scientific law
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3.) what are the fizzy bubbles made out of that show up when you toss a…
The fizzy bubbles are made of carbon dioxide ($\boldsymbol{CO_2}$) gas, which is produced by the chemical reaction between ingredients (like sodium bicarbonate and citric acid) in…
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question 14 of 16 when gloves are required for handling sharp edges, ch…
B. Leather gloves
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multiple-choice question why should you not return chemicals to the ori…
They might be contaminated
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each of the following situations could happen in a science classroom. d…
Unsafe practice: Telling the partner to stay still and running to get a cup of water to put out the fire. Correct thing to do: Use a fire blanket to smother the fire or tell the p…
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which topic is commonly used to explain activation energy and how chemi…
B. collision theory
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free energy reaction progress which line indicates a higher reaction ra…
B because it has a lower activation energy
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consider the following chemical equation in equilibrium. h₂so₄(aq) ⇌ 2h…
D. The chemical equilibrium will shift to the left.
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magnesium oxide does not readily decompose into magnesium and oxygen. t…
A. temperature
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demonstrate understanding 1. create a table that describes four states …
| State of Matter | Shape | Volume | Particle Arrangement | Particle Motion | Compressibility | | ---- | ---- | ---- | ---- | ---- | ---- | | Solid | Definite | Definite | Closely…
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according to le chatelier’s principle, what happens to the equilibrium …
The value of the equilibrium constant (K) remains the same.
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which best explains why sawdust burns more quickly than a block of wood…
More molecules in the sawdust can collide with oxygen molecules.
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which lists all of the substances that appear in equilibrium constant e…
B. pure gas and aqueous solution
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consider the chemical equilibrium of the reaction agcl(s) ⇌ ag⁺(aq) + c…
The chemical equilibrium of the system shifts to the left.
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which statement correctly describes a reaction in dynamic equilibrium? …
B. At dynamic equilibrium, the reactions continue but the amounts of reactants and products do not change
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a change in which factor will affect the rate of reaction only when gas…
B. pressure
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demonstrate understanding 1. create a table that describes four states …
| State of Matter | Shape | Volume | Particle Arrangement | Compressibility | | ---- | ---- | ---- | ---- | ---- | | Solid | Definite | Definite | Closely packed, ordered | Low (n…
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what does this piece of evidence best support? ○ the collision theory ○…
the collision theory
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consider the following reversible reaction. co(g) + 2h₂(g) ⇌ ch₃oh(g) w…
B. $K_{eq} = \frac{[\text{CH}_3\text{OH}]}{[\text{CO}][\text{H}_2]^2}$
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which will not appear in the equilibrium constant expression for the re…
[C]
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consider the chemical equilibrium of a soap that is present in its aque…
B. The equilibrium will shift to the left to such an extent that it leads to the precipitation of solid soap.
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consider the following equation in chemical equilibrium c₂h₄(g) + h₂(g)…
The amount of ethane increases.
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which statement best applies collision theory to preventing a dangerous…
D. Keep the reactants in separate containers.
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what happens as the activation energy increases? the pressure of the sy…
D. The reaction begins to slow down.
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consider the reaction. 2so₂(g) + o₂(g)⇌2so₃(g) when does the given chem…
D. when the rates of the forward and reverse reactions are equal (assuming the options are labeled A to D with the last option as D; if original labels were different, adjust acco…
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a reaction occurs when solid x is placed into solution y. as a result, …
A. It increased the number of molecular collisions.
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the dissociation of a weak electrolyte is suppressed when a strong elec…
a strong electrolyte with a common ion is added to the weak electrolyte solution.
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consider the equation below. caco₃(s)⇌cao(s) + co₂(g) what is the equil…
\( K_{eq} = [\text{CO}_2] \)
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according to le chatelier’s principle, what happens when the concentrat…
The equilibrium shifts to the right to favor the formation of products.
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consider the reaction h₂(g) + i₂(g) ⇌ hi(g) with an equilibrium constan…
The equilibrium will shift to the left to favor the reactants.
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consider the chemical equilibrium of the reaction. agcl(s) ⇌ ag⁺(aq) + …
The chemical equilibrium of the system shifts to the left.
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according to le chateliers principle, what happens to the equilibrium c…
The value of the equilibrium constant (K) remains the same.
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according to le chateliers principle, a system in chemical equilibrium …
A. reduces the stress
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according to le chatelier’s principle, which statement is true? the equ…
B. The equilibrium constant changes with a change in temperature.
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consider the reaction in chemical equilibrium. cocl₂(g) ⇌ co(g) + cl₂(g…
\( K = \frac{[\text{CO}][\text{O}_2]}{[\text{COO}_2]} \) (Assuming the reactant is \( \text{COO}_2 \) and products are \( \text{CO} \) and \( \text{O}_2 \); the correct option sho…
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consider the chemical equilibrium of the reaction. nh₄oh(aq) ⇌ nh₄⁺(aq)…
The chemical equilibrium will shift to the left.
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consider the following chemical reaction in equilibrium. ch₃cooh ⇌ ch3c…
The chemical equilibrium of the system will be unaffected.
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consider the chemical reaction in equilibrium. aa(aq) + bb(aq) ⇌ cc(aq)…
value of \( K \) does not change
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consider the chemical equation in equilibrium. ch₄(g) + h₂o(g) ⇌ co(g) …
A. The equilibrium will shift to the left to favor the reverse reaction.
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which represents the correct equilibrium constant expression for the re…
\( K_{eq} = \frac{[Cu^{2+}]}{[Ag^+]^2} \)
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consider the reaction below. pcl₅(g)⇌pcl₃(g) + cl₂(g) at 500 k, the rea…
0.042
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consider the equilibrium system below. nh₄cl(s)↔nh₄cl(g) if the system …
The rate of sublimation of the $\ce{NH4Cl}$ crystals is equal to the rate of solidification of the $\ce{NH4Cl}$ vapors
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in the atmosphere, under the effect of ultraviolet rays, oxygen molecul…
The rates of the forward and reverse reactions will remain the same.
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consider the general reversible reaction. aa + bb \\longleftrightarrow …
\( K_{eq} = \frac{[C]^c[D]^d}{[A]^a[B]^b} \) (the last option among the given choices)
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consider the following reversible reaction. 2h₂o(g) ⇌ 2h₂(g) + o₂(g) wh…
\( K_{eq}=\frac{[H_2]^2[O_2]}{[H_2O]^2} \) (the last option among the given choices)
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consider the reaction. 2hf(g)⇌h₂(g) + f₂(g) at equilibrium at 600 k, th…
A. \( 2.1\times 10^{-2} \)
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carbon monoxide (co) reacts with hydrogen (h₂) to form methane (ch₄) an…
\( 5.9 \times 10^{-2} \) (corresponding to the option "5.9 x 10⁻²")
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the reaction below is at dynamic equilibrium. n₂(g) + 3h₂(g)⇌2nh₃(g) wh…
The rate of the forward reaction equals the rate of the reverse reaction.
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which statement correctly defines dynamic equilibrium? ○ at dynamic equ…
A. At dynamic equilibrium, the rates of forward and reverse reactions are equal.
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1. define matter 2. list the 2 types of properties of matter with an ex…
The new volume of the gas will be \( 0.52 \, \text{L} \). ### Question 17
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consider the reaction below c₂h₄(g) + h₂(g) → c₂h₆(g) which change woul…
D. increase temperature and increase pressure (Note: Assuming the options are labeled A - D as per typical multiple - choice, with the last option being D. If the original options…
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free energy (y - axis), reaction progression (x - axis). which line ind…
B because it has a lower activation energy
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an increase in temperature affects the reaction rate by ○ decreasing th…
B. increasing the number of molecules that have sufficient kinetic energy to react
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which will cause an increase in the reaction rate between molecules? ○ …
B. Molecules collide more frequently.
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a solid reactant is placed into a beaker of a warm water. the liquid vi…
B. Fewer bubbles will be produced because of fewer collisions of reactant molecules.
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magnesium oxide does not readily decompose into magnesium and oxygen. t…
A. temperature
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consider the reaction below 2nh₃(g) ↔ n₂(g) + 3h₂(g) which is most like…
The reaction rate decreases.
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ben observes how quickly some dry wood is burning in a campfire. which …
A. reaction rate
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consider the germanium atom. part 1 of 2 write the condensed electron c…
\([Ar]3d^{10}4s^{2}4p^{2}\)
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which applies to the collision theory? particles need to collide in ord…
A. Particles need to collide in order to react.
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what does this piece of evidence best support? the collision theory the…
the collision theory
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directions: below are several elements in a series. write their symbols…
Bi, O, L, Og, Y (forming BIOLOGY) ### Problem 18:
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a 4 ml tube of blood contains 7.2 mg of cholesterol, what is the mg% of…
180 (corresponding to the option "180")
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part 2 of 2 which violate hunds rule? check all that apply. none of the…
The configurations that violate Hund's rule are: - The second row (with \( \uparrow\quad\uparrow\quad\uparrow\downarrow \)) - The third row (with \( \uparrow\quad\uparrow\quad\dow…
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the electron configurations described in this chapter all refer to gase…
[Ar] $4s^{1}3d^{10}4p^{4}$ (the option with this electron configuration)
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what is the maximum number of electrons that can have n=4, m_l=3 in an …
2
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in the series shown below, which of the following has the most unpaired…
$Ar^{3+}$ has the most unpaired electrons (3), compared to $Ar$ (0), $Ar^+$ (1), $Ar^{2+}$ (2). So the answer is $Ar^{3+}$.
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if the caffeine concentration in a particular brand of soda is 3.39 mg/…
First, convert the lethal dose from grams to milligrams: \( 10.0\ g = 10.0\times1000\ mg = 10000\ mg \). Then, find the amount of caffeine in one can: \( 3.39\ mg/oz\times12\ oz =…
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give the electron configuration for the element given. use the noble ga…
\( [Xe] 4f^{14} 5d^{4} 6s^{2} \)
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write the ground-state electron configuration for each element. part 1 …
s: Part 1 (S): \(1s^2 2s^2 2p^6 3s^2 3p^4\) Part 2 (Ca): \(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2\)
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given the equation $\\ln a = \\ln a_0 - kt$, rearrange the equation to …
\( k = \frac{\ln A_0 - \ln A}{t} \) (corresponding to the option \( k = (\ln A_0 - \ln A)/t \))
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which orbital is lower in energy in a many-electron atom? ○ 4s ○ 3s
3s (the orbital with the option "3s")
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particular care must be taken when using radiation for medical imaging.…
A. ionizations
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indicate the total number of 3d electrons in s (z=16).
0
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complete the table below by using the information from the periodic tab…
To complete the table, we use the following rules from the Periodic Table: - **Symbol**: The chemical symbol of the element. - **Atomic Number**: Equal to the number of protons (a…
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calculate the total number of electrons that can occupy the following o…
2 ### Part 2: Seven \( f \) orbitals
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11. what does the period tell you?
In the periodic table, the period (horizontal row) of an element indicates the number of electron shells (energy levels) that the atoms of that element possess.
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give all the possible values of the four quantum numbers of an electron…
\( n \): \( 3 \) \( l \): \( 2 \) \( m_l \): \( -2, -1, 0, 1, 2 \) \( m_s \): \( \frac{1}{2} \) or \( -\frac{1}{2} \)
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select the quantum numbers associated with the 5d orbital. principal qu…
- Principal quantum number (\(n\)): \(5\) - Angular momentum quantum number (\(l\)): \(2\) - Possible magnetic quantum numbers (\(m_l\)): \(-2, -1, 0, +1, +2\)