Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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matter does not exist in a fixed state. through the addition or loss of…
- Solid → Liquid: Melting, energy gained - Solid → Gas: Sublimation, energy gained - Gas → Solid: Deposition, energy lost - Gas → Liquid: Condensation, energy lost - Liquid → Gas:…
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question 6 (1 point) gradualism is a) the rapid process by which inmate…
B. a "go - slow" approach to design and implementation of new programs.
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balancing equations type coefficients to balance the equation. you can …
The coefficients are 2, 6, 1. So the blanks (from left to right) are filled with 2, 6, 1.
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to solve problems using charles law, which mathematical equation should…
\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\) (the second option)
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the air pressure in a volleyball is 75 psi. what is this pressure in to…
3900 torr
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a helium balloon has a volume of 10.2 l at -34°c and 366 mm hg. what is…
5.61 L
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calculate the density of co₂ gas at 20°c and 860 mm hg. (co₂ = 44.0 g/m…
\(2.07g/L\)
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question 1 3 pts choose the gas that has the greatest average molecular…
He
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balancing equations type coefficients to balance the equation. fes+ o₂→…
\(4FeS+7O_2 ightarrow2Fe_2O_3 + 4SO_2\)
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4. write out the orbital diagram (boxes) for only the valence electrons…
The orbital diagram for the valence electrons of Se: $$ \begin{matrix} \uparrow\downarrow\\ 4s \end{matrix}\quad \begin{matrix} \uparrow&\uparrow&\uparrow\downarrow\\ 4p_x&4p_y&4p…
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10 sound may best be described as a form of electrical energy chemical …
10. mechanical energy 11. decrease 12. It has less mass than Earth. 13. Atomic nuclei are broken apart. 14. Atomic number and mass number both decrease. 15. Electromagnetic Force,…
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multiple choice identify the choice that best completes the statement o…
1. a. \(BaCl_{2}\) 2. c. electron - electron repulsive forces 3. c. \(+4\) 4. a. (the diagram with the arrow from \(C\) to \(O\)) 5. b. \(H - B\) 6. e. electrons are shared betwee…
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consider this balanced equation: 2 n₂o(g)→2 n₂(g)+o₂(g) express the rat…
- Rate expression: \(r =-\frac{1}{2}\frac{\Delta[N_2O]}{\Delta t}=\frac{1}{2}\frac{\Delta[N_2]}{\Delta t}=\frac{\Delta[O_2]}{\Delta t}\) - Average rate of reaction: \(0.0020\space…
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consider this balanced equation: 2n₂o(g)→2n₂(g)+o₂(g) express the rate …
- Rate expression: \(r =-\frac{1}{2}\frac{\Delta[N_{2}O]}{\Delta t}=\frac{1}{2}\frac{\Delta[N_{2}]}{\Delta t}=\frac{\Delta[O_{2}]}{\Delta t}\). - Average rate of reaction: \(2.0\t…
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an elemental tale: the gold dust kid the kid mounted his trusty steed, …
Boron, Iron, Neon, Uranium, Potassium, Oxygen, Sulfur, Mercury, Chlorine, Calcium, Zinc, Helium, Phosphorus, Tin, Lead, Magnesium, Copper, Nickel, Platinum, Aluminum, Nitrogen, Si…
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5. true or false? 6. name a chemical in your facility that can cause ch…
5. False 6. Sulfuric acid (\(H_2SO_4\)) (or other appropriate chemicals) 7. b. Wash your eyes with emergency eyewash equipment 8. a. Go to the hospital 9. Welding
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consider this balanced equation: mathrm{h}_{2} mathrm{o}_{2}(a q)+3 mat…
- Rate of change of \(I^-\): \(-0.0132\space M/s\) - Rate of change of \(H^+\): \(-0.0088\space M/s\) - Average rate of the reaction: \(0.0044\space M/s\)
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how did advances in physics and chemistry dramatically change manufactu…
created research and development divisions
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salt and benzoic acid in an aqueous solution can be separated with ice …
True
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to calculate the percent of a total mixture, divide the mass of ____ by…
one substance; the mixture of solids
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a sample of solid iron and sand can be most easily separated using a __…
magnet
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consider two substances: substance a is soluble in a range of temperatu…
heterogeneous; homogeneous
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chemists have developed the general rule \like dissolves like\ for dete…
True
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is a kinetic process defined by rate, and is not specific to concentrat…
Dissolution
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solubility is described in terms of both concentration and temperature.…
True
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when both a solute and solvent are solids, they are said to be either m…
False
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in salt water, water (h₂o) is the ______ and salt (nacl) is the ______.…
solvent; solute
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is an example of a homogeneous mixture. oil and vinegar dressing apple …
Apple juice
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a_____is composed of visibly distinguishable parts and does not have un…
heterogeneous mixture
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compounds can only be separated into their component elements by ___. b…
breaking chemical bonds
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the simplest chemical substances are composed of only_____type(s) of at…
1
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7. describe iowas soil. what are the primary crops grown in this soil?
Iowa has rich, fertile soil (high in organic matter). Primary crops: corn and soybeans.
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read the excerpt below from \at the hearth\ by laura esquivel and answe…
Women work in the kitchen to prepare meals but are humble about their work.
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trends in electronegativity 22. use table 6.2. what trend do you see in…
- **Question 22**: Electronegativity decreases down a group and increases across a period. - **Question 23**: C. Nonmetals have higher electronegativity values than metals; D. Ele…
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balancing equations type coefficients to balance the equation. you can …
\(4Al+3O_2 ightarrow2Al_2O_3\)
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how many atoms? calculate the number of atoms of each element... 4(nh_{…
N = 8, H = 32, S = 4
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given their electronegativity values, which pair of atoms could form a …
A. O (3.5) and Cl (3.0)
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(choose 2) li is which of the following * pure substance mixture compou…
- For Li: Pure Substance, Element - For LiCl: Pure Substance, Compound - For \(C_6H_{12}O_6\): Pure Substance, Compound
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what bonds might form in a carbon atom with sp2 hybrid orbitals? a. fou…
B. a double bond and two single bonds
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(choose 2) blood is which of the following: * pure substance mixture co…
- Blood: Mixture, Heterogenous - Milk: Mixture, Heterogenous - Sprite: Mixture, Homogenous
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how many electrons are shared when two atoms form a triple bond? a. 2 b…
C. 6
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(choose 2) kcl is which of the following * pure substance mixture compo…
- For \(KCl\): Pure Substance, Compound - For Sand and Water: Mixture, Heterogeneous
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which of the following substances would you expect to have a low meltin…
C. carbon dioxide
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task 10: if a graphs y - axis is labeled concentration (mol/l) and the …
Task 10: B. Change in concentration over time Task 11: B. Concentration is decreasing
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(choose 2) co2 is which of the following. pure substance mixture compou…
Compound, Pure Substance
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what type of compound is composed of covalently bonded atoms and has a …
A. complex molecular compound
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how does a coordinate covalent bond differ from a standard covalent bon…
B. in the source of the electrons shared
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4. what makes a molecule an organic compound? a) it contains carbon and…
4. a) It contains carbon and hydrogen 5. b) Carboxyl (—COOH)
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how do the resonance structures for ozone, o₃, differ? ○ a. they have d…
D. They have electrons in different locations.
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(choose 2) muddy water is which of the following: * pure substance mixt…
- Muddy Water: Mixture, Heterogenous - Granite: Mixture, Heterogenous - Steel: Mixture, Homogenous
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a student states that non - metal atoms share their core electrons when…
A. Atoms do not share electrons during covalent bonding.
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types of reactions name each type of (unbalanced) reaction... a + b →→ …
1. COMBINATION 2. SINGLE REPLACEMENT 3. DOUBLE REPLACEMENT
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when two atoms share four electrons with one another, what type of bond…
D. a double covalent bond
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(choose 2) si is which of the following: * pure substance mixture compo…
- For \(Si\): Pure Substance, Element - For \(NaCl + H_2O\): Mixture, Homogenous - For \(C_6H_{12}O_6 + H_2O\): Mixture, Homogenous
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which term describes a sedimentary rock that is composed of material ev…
B. chemical
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types of reactions name each type of (unbalanced) reaction... ch₄ + o₂ …
1. Combustion 2. Combination 3. Single Replacement
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(choose 2) caco3 is which of the following: * pure substance mixture co…
- For \(CaCO_3\): Pure Substance, Compound - For \(Cu\): Pure Substance, Element - For \(H_2O\): Pure Substance, Compound
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types of reactions match the reaction types... double replacement singl…
1. DOUBLE REPLACEMENT 2. DECOMPOSITION
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types of reactions match the reaction types... double replacement combi…
First reaction: COMBINATION, Second reaction: SINGLE REPLACEMENT
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task 8: in a bar graph comparing the boiling points of liquids, what do…
B. Boiling point value
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a mixture of three gases has a total pressure of 1380 mm hg at 298 k. t…
356 mm Hg
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basics of balancing fill in the blanks... chemical equations must be ba…
Law of Conservation of Mass; coefficients; subscripts
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calculate the density, in g/l, of cl₂(g) at stp. 0.316 g/l 3.16 g/l 46.…
3.16 g/L
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how many molecules of nitrogen gas can be present in a 2.5 l flask at 3…
\(4.9\times 10^{22}\ molecules\)
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chemical reactions match the chemical equation symbols... a reversible …
A REVERSIBLE REACTION - $ ightleftharpoons$; HEAT BEING APPLIED - $\Delta$; SEPARATES 2 REACTANTS OR 2 PRODUCTS - '+'; A CATALYST IS BEING USED - 'Pt' (written above the arrow).
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if 30.0 l of oxygen gas is cooled from 473 k to 274 k at constant press…
17.4 L
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chemicals released into the air from human activity, such as sulfur dio…
troposphere
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consider the reaction below. pcl₅(g) ←→ pcl₃(g) + cl₂(g) at 500 k, the …
0.042
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consider the reaction. n₂(g) + 3h₂(g) ←→ 2nh₃(g) at equilibrium, the co…
0.0030
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consider the following reversible reaction. co (g) + 2h₂ (g) ←→ ch₃oh (…
\( K_{eq}=\frac{[CH_3OH]}{[CO][H_2]^2} \) (la cuarta opción en el orden de las opciones dadas)
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consider the reaction. 2so₂(g) + o₂(g) ↔ 2so₃(g) when does the given ch…
when the rates of the forward and reverse reactions are equal
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a reaction occurs when solid x is placed into solution y. as a result, …
It increased the number of molecular collisions.
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what is the formula for the $k_{sp}$ of $fe(oh)_3$? use the equation $f…
\( K_{sp}=[Fe^{3 +}][OH^{-}]^3 \) (la tercera opción)
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what is the definition of \sonnet\? a poem written in praise of ones lo…
a 14 - line poem that follows a particular rhyme scheme
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consider the chemical reaction in equilibrium. aa(aq)+bb(aq)⇌cc(aq)+dd(…
value of \( K \) does not change
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what happens as the activation energy increases? the reactant surface a…
The reaction begins to slow down.
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consider this chemical reaction in equilibrium. ch₃cooh ⇌ ch₃coo⁻(aq) +…
The chemical equilibrium of the system will be unaffected.
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which statement best applies collision theory to preventing a dangerous…
Keep the reactants in separate containers.
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there are four unknown compounds that are labeled w, x, y, and z. only …
potassium bromide.
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what is iambic pentameter? lines of poetry with a rhyme scheme of ababa…
lines of poetry with a pattern of 10 unaccented and accented syllables
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consider the equation below. caco₃(s) ↔ cao(s) + co₂(g) what is the equ…
\(K_{eq}=[CO_2]\)
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iron(ii) fluoride (fef₂) partially dissolves in water with the equation…
\( 8.39\times 10^{-3}M \)
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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…
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 this equation in chemical equilibrium. c₂h₄(g) + h₂(g) ⇌ c₂h₆(…
The amount of ethane decreases.
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the ( k_{sp} ) equation ( k_{sp} = ag^{+}^{2}co_{3}^{2 -} ) is the solu…
# Explicación breve: La constante de producto de solubilidad \( K_{sp} \) se define como el producto de las concentraciones de iones en equilibrio, elevadas a las potencias de sus…
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lead(ii) iodate $(pb(io_{3})_{2})$ has a solubility product constant of…
\(4.52\times 10^{-5}\text{ M}\)
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the dissociation of a weak electrolyte is suppressed when a strong salt…
a strong electrolyte with a common ion is added to the weak electrolyte solution.
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according to le chateliers principle, what happens when the concentrati…
La tercera opción: "The equilibrium shifts to the right to favor the formation of products."
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calculate the molar solubility of copper(ll) arsenate $(cu_{3}(aso_{4})…
$3.7\times 10^{-8}\ \mathrm{M}$
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consider the energy diagram. which line indicates a higher reaction rat…
C. B because it has a lower activation energy.
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the diagram shows the movement of particles. what does this piece of ev…
the collision theory
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examine the equation below: caco₃ → cao + co₂ based on what youve learn…
Reactant: Calcium carbonate (\(CaCO_{3}\)). Products: Calcium oxide (\(CaO\)) and carbon dioxide (\(CO_{2}\)).
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question 8 of 10 read these lines from emily dickinsons poem \324\ (\so…
B. abcb
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which of these is a poetic device walt whitman often uses to emphasize …
C. Personification
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which characteristic must a food have to receive a atural\ label from t…
no artificial ingredients
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an energy source is a source of (choose all that apply) power. thermal …
1. thermal, pneumatic, chemical, mechanical, electrical, hydraulic 2. False
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a chemical that can cause cancer is known as a... carcinogen asphyxiant…
- First question: Carcinogen - Second question: False
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msds should be reviewed only after exposure. true false question 8 chem…
- First question: B. False - Second question: A. Asphyxiants
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what does msds stand for? material safety data sheet material substance…
For the first question: Material Safety Data Sheet. For the second question: All answers are correct.