Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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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.
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testing for ph levels can be useful in a variety of ways. healthcare pr…
Hydrogen ions ($H^+$)
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1. if a solution has equal numbers of hydronium and hydroxide ions, wha…
C. 7
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fill in the name and empirical formula of each ionic compound that coul…
| Cation | Anion | Empirical Formula | Name of Compound | | ---- | ---- | ---- | ---- | | Sodium ion ($\text{Na}^+$) | Hydroxide ion ($\text{OH}^-$) | $\text{NaOH}$ | Sodium hydro…
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complete the table below by writing the symbols for the cation and anio…
| Ionic compound | Cation | Anion | | ---- | ---- | ---- | | $(NH_4)_2O$ | $NH_4^+$ | $O^{2 -}$ | | $Cr_2(CO_3)_3$ | $Cr^{3+}$ | $CO_3^{2 -}$ | | $Mn(NO_3)_3$ | $Mn^{3+}$ | $NO_3^…
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chemical control of respiration is directly dependent upon the level of…
d. Carbon dioxide
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nuclear chemistry section 24.1 nuclear radiation in your textbook, read…
(2) radiation (3) radioactivity (4) radioactive decay (6) gamma ray (7) alpha particle (8) beta particles (9) X - ray (10) gamma ray (11) 0 (12) Ernest Rutherford (13) + 2 (14) - …
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air is a solution of gases. it is composed of 1% water vapor, 0.04% car…
A. nitrogen
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suppose you add solute molecules that are highly concentrated to water …
The solute concentration will be the same everywhere.
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imagine you have solute molecules at a very high concentration at a spe…
Solute molecules will spread out evenly reaching equilibrium.
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a solution is a mixture of a multiple choice solute dissolved in a solv…
solute dissolved in a solvent.
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which dye would you predict to move the fastest (and thus go furthest i…
potassium permanganate (mw = 158 g/mol)
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two solutions are made by mixing sugar and enough water to make a 1 lit…
the 10% sugar solution
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what drives diffusion? multiple choice chemical reactions within the so…
the random movement of molecules
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imagine that you have been assigned five substances for which you will …
Substance #4 will diffuse farthest because the molecular weight is least.
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when looking at your data from the effect of concentration on the rate …
the rate of diffusion decreased for all three concentrations of potassium permanganate crystals
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question 49 2 pts a _______ is intended to be an ideal organization dya…
Question 49: C. bureaucracy Question 50: B. mechanical; organic
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count the atoms! f₃no₂s
7
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count the atoms! 3fe(oh)₃
21
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count the atoms! f3no2s
7
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count the atoms! ch₃coona
8
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count the atoms! c₈h₁₈
26
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count the atoms! c₈h₁₈
26
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physical hazard classes represent hazards relating to physical and chem…
True
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count the atoms! hg(oh)2
5
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the two hazard classes adopted by whmis are: (select all that apply) da…
C. Health Hazard, D. Physical Hazard
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ghs covers all hazardous chemicals and may be adopted to cover chemical…
True
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count the atoms! 6hnco
24
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count the atoms! ga(clo4)3
16
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count the atoms! 5basi₂o₅
40
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review the information in this chapter by answering the following quest…
1. Ethanol 2. Different drinks have different alcohol concentrations. 3. Body weight 4. Slows alcohol absorption 5. For men, 5 or more drinks in about 2 hours; for women, 4 or mor…
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two types of restraints are: physical and chemical true false
True
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density involves the amount of a material in a certain volume. when a m…
The liquid state is more dense than the solid state.
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golds natural state has a definite shape and a definite volume. what is…
solid
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michael has a substance that he puts in container 1. the substance has …
gas
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mercurys natural state is where the atoms are close to each other but a…
B. liquid
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47. the amount of carbon - 14 in ancient artifacts and fossils is often…
Number of protons: 6, Number of neutrons: 8, Symbol: \(_6^{14}C\)
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determine the number of protons and neutrons in each isotope. a. $_{7}^…
Number of protons: 7 Number of neutrons: 7
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numeric 2 points. the initial volume reading is 2.0 ml. after adding a …
# Explicación: ## Paso 1: Calcular el volumen del material El volumen del material es igual al volumen final menos el volumen inicial. $V = V_{final}-V_{inicial}=9.2\ mL - 2.0\ mL…
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calculate the volume of a material if its mass is 31.4 g and its densit…
7.72 mL
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numeric 2 points an empty evaporating dish weighs 20.0 g. the dish with…
# Explicación: ## Paso 1: Calcular la masa del polvo La masa del polvo se obtiene restando la masa del plato evaporador vacío de la masa del plato evaporador con el polvo. $m = 26…
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pat is normally very restless and fidgety, whereas shelley is usually q…
3) temperament.
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task one for each of the following, explain whether or not you think th…
1. Y. The reasoning is logical using deductive logic. 2. N. The initial premise is false. 3. Y. Valid analogy for reasoning. 4. Y. Uses factual evidence for reasoning. 5. N. Commi…
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frans avoids talking with food in his mouth because other people think …
1. 4) norms 2. None of the provided options are correct. Personal space refers to the physical distance people like to maintain around themselves.
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1. where are the most active metals located? 2. where are the most acti…
1. Lower - left part of the periodic table (Group 1 and 2 towards the bottom). 2. Upper - right part of the periodic table (Group 17). 3. Decreases; due to increased nuclear charg…
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12 another name for thermal energy is ________. molecules in motion tem…
heat
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2. how can stoichiometry principles be applied to analyze and interpret…
Stoichiometry principles are applied by using mole - ratios from balanced chemical equations to predict reactant and product amounts in chemical reactions, as illustrated by combu…
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1. why is optimizing chemical reaction processes important in various f…
Optimizing chemical reaction processes is important for efficiency, cost - reduction, and waste minimization. Stoichiometry contributes by providing quantitative relationships to …
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a solid is weighed on the balance using the following steps: 1. the bal…
$0.444$
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what can a person do to limit exposure to x - rays? wear sunblock avoid…
wear a protective lead vest
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which properties of water contribute to the formation of the meniscus? …
C. cohesion, D. adhesion
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8.) find the molar mass of ca₃(po₄)₂. (3 points)
310.18 g/mol
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the use of percent yield calculations to assess efficiency.
Percent yield calculations are used to compare actual and theoretical yields, thus assessing the efficiency of a chemical process.
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how you would apply stoichiometry principles to calculate theoretical y…
Follow the above four - step process to calculate the theoretical yield using stoichiometry principles.
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directions: solve each of the following problems 7 - 12 as directed. sh…
\(\mathbf{208.23\ g/mol}\)