化學
化學反應、化學計量、分子結構與元素性質。
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complete the balanced dissociation equation for the compound below in a…
$HNO_3(aq) ightarrow H^+(aq)+NO_3^-(aq)$
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write the balanced dissociation equation for solid iron(iii) hydroxide …
$Fe(OH)_3(s) ightleftharpoons Fe^{3 + }(aq)+3OH^-(aq)$
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which one of the following is a strong base? a mg(oh)₂ b ca(oh)₂ c nh₃ …
B. $Ca(OH)_2$
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complete the balanced dissociation equation for the compound below in a…
LiCl(s) $ ightarrow$ Li⁺(aq) + Cl⁻(aq)
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complete the balanced dissociation equation for the compound below in a…
LiCl(s) $ ightarrow$ Li$^+$(aq) + Cl$^-$(aq)
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complete the balanced dissociation equation for the compound below in a…
$HClO_4(aq) ightarrow H^+(aq)+ClO_4^-(aq)$
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complete the balanced dissociation equation for the compound below in a…
$CaBr_2(s) ightarrow Ca^{2+}(aq)+ 2Br^-(aq)$
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write the balanced dissociation equation for solid nickel(ii) iodide in…
$NiI_2(s) ightarrow Ni^{2 + }(aq)+2I^{-}(aq)$
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which one of the following can be classified as a strong electrolyte? a…
C. $NH_{4}NO_{3}$
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the work of minimalist artists is generally created from natural materi…
False
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write the balanced dissociation equation for solid iron(iii) nitrate in…
$Fe(NO_3)_3(s)\to Fe^{3+}(aq)+3NO_3^-(aq)$
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the reaction of glucose, c₆h₁₂o₆, with oxygen produces carbon dioxide a…
First question: 19 Second question: 13
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given the unbalanced equation: al + cuso₄ → al₂(so₄)₃ + cu. when proper…
Question 1: 9 Question 2: 5
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question 5 6 pts the following reaction: h₂ + i₂ → 2hi, is an example o…
Question 5: combination. Question 6: single - replacement.
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question 3 6 pts the following reaction: c + o₂ → co₂, is an example of…
Question 3: combination. Question 4: single - replacement.
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write the balanced dissociation equation for solid cesium phosphate in …
$Cs_3PO_4(s) ightarrow 3Cs^+(aq)+PO_4^{3 - }(aq)$
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the ions formed when sr(c₂h₃o₂)₂ dissociates in water are answer: a sr²…
C. $Sr^{2 + }$ and $C_2H_3O_2^-$
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question 1 6 pts the following reaction: mg + feo → mgo + fe, is an exa…
Question 1: C. single - replacement Question 2: C. single - replacement
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complete the balanced dissociation equation for the compound below in a…
NaCl(s) $ ightarrow$ Na⁺(aq) + Cl⁻(aq)
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which of the following phosphate salts are insoluble in water? a (nh₄)₃…
E. $Ca_3(PO_4)_2$
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write the balanced dissociation equation for solid rubidium hydroxide i…
$RbOH(s) ightarrow Rb^+(aq)+OH^-(aq)$
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write the balanced dissociation equation for solid copper(ii) sulfide i…
CuS(s) $ ightleftharpoons$ Cu$^{2 + }$(aq) + S$^{2 - }$(aq)
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the precipitate formed when ni(no₃)₂ is mixed with li₂s is answer: a. n…
B. NiS
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what is the oxidation number of each vanadium atom in v₂o₅?
5
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question 1 1. an essential characteristic of effective learning is the …
B. metacognition
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a 50.0 ml solution of ca(oh)₂ with an unknown concentration was titrate…
$0.0966$
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a 50.0 ml solution of ca(oh)₂ with an unknown concentration was titrate…
$0.00483$
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a 50.0 ml solution of ca(oh)₂ with an unknown concentration was titrate…
$9.656\times10^{-3}$
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a 50.0 ml solution of ca(oh)₂ with an unknown concentration was titrate…
$Ca(OH)_2(aq)+2HNO_3(aq) ightarrow Ca(NO_3)_2(aq) + 2H_2O(l)$
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a theme of this story is that nature and animals are beautiful. how doe…
Lily and her mom decide not to use chemicals to remove the moths from her vine.
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write a balanced chemical equation based on the following description: …
$2HNO_3(aq)+MgCO_3(s) ightarrow Mg(NO_3)_2(aq)+H_2O(l)+CO_2(g)$
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write the balanced net ionic equation for the reaction when licl and na…
$3Li^{+}(aq)+PO_{4}^{3 - }(aq) ightarrow Li_{3}PO_{4}(s)$
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write a balanced chemical equation based on the following description: …
$2C_6H_{14}(g)+19O_2(g) ightarrow 12CO_2(g)+14H_2O(g)$
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the following reaction takes place in aqueous solution. hcl (aq) + koh(…
$H^{+}(aq)+OH^{-}(aq) ightarrow H_{2}O(l)$
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write the balanced net ionic equation for the reaction when alcl₃ and n…
$Al^{3+}(aq)+3OH^{-}(aq) ightarrow Al(OH)_3(s)$
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which choice correctly identifies the oxidation number (o.n.) for the g…
D. $Se^{2 - }, O.N.=-2$
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classify the type of reaction is represented by the following equation:…
A. acid - base
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5 formula 1 punto determine the pressure, in atm, when a constant - vol…
$1.2$ ### 6.
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4. what kinds of materials or conditions help preserve fossils? 5. what…
4. Sediments like clay, silt, sand and low - oxygen environments. 5. Fossilized wood where organic material is replaced by minerals; forms when wood is buried and minerals seep in…
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1. respuestas múltiples 1 punto which phase(s) of matter has variable s…
Gas ### 2.
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in the following chemical reaction, which element is the reducing agent…
B. Ag
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what solid would form when phosphoric acid (h₃po₄) is added to milk of …
B. $Mg_3(PO_4)_2$
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complete the balanced neutralization equation for the reaction below. b…
$HClO_4(aq)+CsOH(aq) ightarrow CsClO_4(aq)+H_2O(l)$
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complete the balanced molecular chemical equation for the reaction belo…
$2NH_4Br(aq)+Pb(NO_3)_2(aq) ightarrow PbBr_2(s) + 2NH_4NO_3(aq)$
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which of the following design elements characterize baroque art and arc…
D. Diagonal movement, curving forms, and dramatic light and shadow
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write a balanced chemical equation based on the following description: …
$N_2(g)+3H_2(g) ightarrow 2NH_3(g)$
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in the following chemical reaction, which element is the oxidizing agen…
A. Sn
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question 3 of 19 complete the balanced molecular chemical equation for …
$\text{Pb(NO}_3)_2(aq)+2\text{LiCl}(aq) ightarrow\text{PbCl}_2(s)+2\text{LiNO}_3(aq)$
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which of the following reactions is an acid - base reaction? answer: a …
B. $NH_3(aq)+HF(aq) ightarrow NH_4^+(aq) + F^-(aq)$
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select the lewis structure that most accurately represents sulfur diflu…
The second structure from the top (where S is the central atom, single - bonded to two F atoms and has 2 lone - pairs on S and 3 lone - pairs on each F) is the correct Lewis struc…
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select the lewis structure that most accurately represents methane (ch₄…
The structure with a carbon atom in the center and single bonds to four hydrogen atoms (the first and third structures shown in the image if they are correct representations of si…
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part 2: physical vs. chemical properties review notes • physical proper…
1. P. Gold is yellow and shiny. 2. C. Iron reacts with oxygen to form rust. 3. P. Water boils at 100°C. 4. C. Baking soda reacts with vinegar to produce carbon dioxide gas. 5. P. …
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write the balanced dissociation equation for solid copper(ii) sulfide i…
$CuS(s) ightarrow Cu^{2+}(aq)+S^{2 - }(aq)$
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write the balanced dissociation equation for solid copper(ii) sulfide i…
CuS(s) $ ightleftharpoons$ Cu$^{2 + }$(aq)+S$^{2 - }$(aq)
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complete the balanced dissociation equation for the compound below. if …
LiOH(s) $\xrightarrow{H_2O}$ Li⁺(aq) + OH⁻(aq)
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a nonelectrolyte answer: a will conduct electricity when placed in aque…
D. will not form any ions in aqueous solution.
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which one of the following is the correct dissociation equation for li₂…
B. $Li_2CO_3(s) ightarrow2Li^+(aq)+CO_3^{2 - }(aq)$
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1 elección múltiple 1 punto which of the following explains why liquids…
Solids have strong forces that hold the particles together. ### 2.
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what salts are in seawater? kcl mgcl cacl all of the above nacl
D. All of the above
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complete the balanced dissociation equation for the compound below in a…
$\text{Rb}_3\text{PO}_4(s) ightarrow3\text{Rb}^+(aq)+\text{PO}_{4}^{3 -}(aq)$
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the illustration to the left represents a mixture of hydrogen ( light b…
The product that forms is $HI$. The number of product molecules formed is 6. The limiting reagent is $H_2$. The number of $I_2$ atoms/molecules in excess is 2.
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questions 8 - 15: circle the choice that best answers each question. 8.…
8. c. Solid 9. a. Faster 10. c. Gas 11. c. The chemical composition 12. c. There is not enough information to answer this question 13. a. Gas 14. d. Both a and c 15. c. The volume…
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ten groups of chemistry students combined three solutions that, when mi…
Does the mixture of solutions release more gas when they are mixed at 25°C compared to 50°C?
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felipe wanted to freeze soda to make popsicles. he knew that soda conta…
The bottles with lids kept on
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after a severe winter storm, garys driveway was covered with ice. he re…
The unsalted ice cubes
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question 15 (1 point) what key policy was associated with the truman do…
B. containment
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question 14 (1 point) the relaxation of tensions between the ussr and t…
a) détente
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which are triglycerides that contain only single bonds between carbon a…
saturated fats
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10 multiple choice 1 point identify the following structure: omega-3 (ω…
omega-3 (ω-3) fatty acid
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gibbs free energy of the reaction (kj/mol) reaction progress reaction i…
Reaction is Exergonic and it favors the product formation
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4 multiple answer 1 point following is the gibbs free energy equation: …
-$\Delta G$
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3 multiple choice 1 point following is the structure of an amino acid: …
Positive
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10 multiple choice 1 point following is the structure of an amino acid:…
Positive
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3 multiple choice 1 point identify the following structure: omega-12 (ω…
D. omega-3 (ω - 3) fatty acid
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gibbs free energy of the reaction (kj/mol) reaction progress reaction i…
Reaction is Exergonic and it favors the product formation
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which of the following ground state atoms are paramagnetic? select all …
Paramagnetic atoms: Ru, H Increasing atomic - radius order: 1. F, 2. O, 3. Al, 4. Zr, 5. Ba
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which of the following orbital diagrams represent the ground state conf…
The correct orbital diagram is the one where the $1s$ and $2s$ orbitals are filled with 2 electrons of opposite spins each, and the $2p$ orbitals have 4 electrons with the first 3…
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which of the following orbital diagrams represent the ground state conf…
The second option (showing 1s, 2s, 2p, 3s, and 3p orbitals with the correct number of electrons as described above) is the correct ground - state configuration for an isolated neu…
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what is the long - hand electron configuration of rhenium, re? enter th…
Question 1: 1s22s22p63s23p64s23d104p65s24d105p66s24f145d5 Question 2: [Xe]4f145d76s2
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which of the following represent the proper long hand form electron con…
Question 1: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{6}5s^{2}4d^{2}$ Question 2: $[Kr]5s^{2}4d^{1}$
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which of the following elements are non - metals (there may be more tha…
Chlorine, Hydrogen 29, 28
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the hydrocarbons of still higher boiling - point which remain in the st…
B. naphtha
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in other methods, ______ or similar solvent liquids are used to dissolv…
B. naphtha
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but a man in massachusetts thought it would be a good idea to dissolve …
C. naphtha
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naphtha means : a chemical used to kill pests (as rodents or insects) a…
a volatile, flammable liquid made of hydrocarbons
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cuando el metano se quema, se combina con oxígeno para formar dióxido d…
# Explicación: ## Paso 1: Analizar la ecuación química La ecuación es $CH_4 + 2O_2 ightarrow CO_2+2H_2O$. Esto muestra que un mol de metano reacciona con 2 moles de oxígeno para p…
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16. y axis label: x axis label: 17. identify if the following chemical …
a. exo b. endo c. exo d. endo e. exo
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g. flammable = chemical property h. blue color = pp i. density = pp j. …
Melting: solid; liquid Freezing: liquid; solid Vaporization: liquid; gas Condensation: gas; liquid Sublimation: solid; gas Deposition: gas; solid
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a. toxic b. corrosive c. flammable d. biohazard 10. draw an nfpa diamon…
a. 2 b. 3 c. 3 d. 5 e. 3 f. 4 g. 3 h. 4 i. 1 k. 2
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4. which diagram best represents a homogeneous mixture of a compound an…
4. e 5. a. 4 b. Mobile phase: ethanol; Stationary phase: glass plate c. Most soluble: orange; Least soluble: brown d. Homogeneous mixture 6. Intramolecular forces 7. c. Gold 8. a.…
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chem 7 pilot study guide test #1 1. classify the following as an elemen…
1.a. Suspension 1.b. Solution 1.c. Element 1.d. Compound 1.e. Element 1.f. Compound 1.g. Solution 2.i. B 2.ii. A, D, H 2.iii. F 2.iv. H 2.v. A 3. Name: Distillation; Type of mixtu…
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q1 chemistry: u2l10.5 annotating periodic table date: teacher: uncommon…
Multiple - Choice Question 1: A. \(1s^{2}2s^{2}2p^{6}\) Multiple - Choice Question 2: A. Argon True - or - False Question 1: False True - or - False Question 2: True True - or - F…
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prepwork part 1: periodic table directions: hidden in each group of let…
1. Helium 2. Na 3. Magnesium 4. C 5. Oxygen 6. S 7. Potassium 8. Cl 9. Fluorine 10. Ar 11. Iron
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what type of rock made from heat and pressure is primarily classified b…
C. Metamorphic
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the haber process is used to synthesize ammonia (nh3) on a large scale …
$7.14\ g$
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a sample of hydrogen (h2) gas was collected over water at 60°c. if the …
0.00323 g
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a flask contains a mixture of two gases: no2 and ne. the flask holds 0.…
$2.94$ g
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what is the density of argon gas (ar) at 3.35 bar and 39.4 °c? express …
5.15 g/L
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5. which chemical do you think would best maintain the ph of the pool w…
C. Sodium Bromide
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properties and uses of acids and bases 4. what do you think the ideal p…
The ideal pH of a swimming pool should be in the range of 7.2 - 7.6.