Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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which interaction is responsible for the force of attraction between th…
proton - electron
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directions: select all the correct answers. which of the following equa…
Cu + H₂O → CuO + H₂, 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O, 2Ag₂O → 4Ag + O₂
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look at the equation below. o2 + cs2 → co2 + so2 which of the following…
D. $3O_2 + CS_2 ightarrow CO_2+2SO_2$
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question 10 of 25 the technology in the picture produces which energy c…
B. Kinetic energy to electrical energy
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question 9 of 25 what type of energy is sound energy? a. kinetic energy…
A. Kinetic energy
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2. the batteries most used in electric cars these days are this type: 3…
2. Lithium - ion batteries 3. Lithium - polymer (Li - Po) batteries (common choice) 4. Lead - acid batteries 5. Chemical energy 6. Thermal runaway
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part b - fill in the blank use word bank to complete each sentence. wor…
11. natural resource 12. climate 13. reservoirs 14. recycle 15. access 16. factor 17. drought 18. region 19. contaminate 20. water cycle
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1. what sizes of alkaline battery can you typically buy at the store? (…
1. AA 2. Lithium - ion 3. Nickel - metal hydride (NiMH) 4. Lead - acid 5. Chemical energy 6. Thermal runaway
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part c: true (t) or false (f) 1. changing the size and shapes of pieces…
1. T 2. F 3. T 4. F 5. F 6. T 7. T 8. T 9. F
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question 10 (1 point) which of the following is the strongest (most rea…
$-\text{CH}_3^-$ (the first option)
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you have a graduated cylinder that you use to measure volume. the cylin…
B. 35.5 ml
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physical or chemical property? iron is magnetic.
Física
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4. which is the most reactive metal in the periodic table? explain. wou…
The most reactive metal is francium. It would not be found in its unreacted elemental form because of its high reactivity.
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the law of conservation of mass states that the mass of the reactants w…
B. equal to
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20 grams of n2 was reacted with 24 g h2 to make nh6. how many grams of …
# Explicación: ## Paso 1: Calcular las masas molares La masa molar de $N_2$ es $M_{N_2}=2\times14 = 28\ g/mol$, la masa molar de $H_2$ es $M_{H_2}=2\times1 = 2\ g/mol$ y la masa m…
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3. arrange the following metals in order from least reactive to most re…
1. Ag 2. Mo 3. Na 4. Rb 5. Cs 6. Fr
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13. which element has the noble gas configuration of ar4s²3d⁶? nickel m…
Iron
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what is the volume? 25.70 ml 29 ml 25.7 ml 25.75 ml
# Explicación: ## Paso 1: Identificar la graduación más cercana Observamos que el nivel del líquido está entre 25 y 26 mL. La graduación del instrumento parece tener intervalos de…
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what is the name of the following white object? 1 point graduated cylin…
# Breve explicación: Los frascos de laboratorio se usan para almacenar y manipular sustancias químicas. Un crisol es un recipiente de forma cilíndrica, generalmente de cerámica o …
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what is the calibration on the following? (also called the minor scale)…
D. 1 mL
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12. which element has the electron configuration of 1s22s22p63s23p5? ch…
Chlorine
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indicate the hybridization of the atoms labeled a, b, c, and d (in that…
$sp^{2}, sp^{2}, sp, sp^{3}$
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which of the following is a chemical property? 1 point the ability to r…
A. the ability to react with oxygen in the air
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11. given the electron configuration of 1s²2s²2p⁴, how many electrons d…
6
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salt dissolves in water... is this a chemical or physical change? chemi…
B. Physical
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14. which of the following noble gas configurations represents the elem…
$[\text{Ar}]4s^{2}3d^{10}4p^{5}$
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1. aluminum (al) has an atomic number of 13 and is located in group 13 …
In general, there is a relationship between the locations of metals on the periodic table and their relative activity. Metals towards the bottom - left of the periodic table are m…
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in a ______ change, bonds between atoms are broken. 1 point chemical ph…
A. chemical
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it is ok to return unused chemicals to their original containers. 1 poi…
B. False
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if you start with 5 grams of the blue chemical and make 11 grams of the…
B. 6 g
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question 8 (1 point) what is the iupac name for the following molecule?…
C. 2,2,6 - trimethyloctane
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clear all atoms prefer to have eight electrons in the valence shell. hi…
Electrons should fill atomic orbitals of the lowest available energy levels before occupying higher levels.
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a safety shower is used when 1 point you forget to take a shower that m…
B. Chemicals get in your eyes
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question 5 (1 point) all of the chairs below correspond to cis - 1,4 - …
The structure where the two methyl groups are in a trans - relationship (one above and one below the ring) is the one that does not correspond to cis - 1,4 - dimethylcyclohexane. …
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question 1. which of the following properties of water can be used to e…
cohesive ability
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question 6 (1 point) how many hydrogens does the molecule carvone have?…
14
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which of the following best describes how these nonrenewable resources …
Combustion of the fuels can lead to high carbon emissions, causing a disruption to the carbon cycle.
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question 4 (1 point) which is the least stable conformation of 3 - meth…
The conformation where the methyl group and the hydroxyl group are in the gauche position (causing steric strain) is the least stable. Without specific labels for the options, it'…
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what are the substances that come before an arrow in a chemical equatio…
# Breve explicación: En una ecuación química, las sustancias que se encuentran antes de la flecha son aquellas que entran en reacción. Estas se denominan reactivos. # Respuesta: B…
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ice is melting...is this a chemical or physical change? 1 point physica…
# Breve explicación: Un cambio físico es aquel en el que la sustancia mantiene su identidad química, solo cambia su estado físico. Cuando el hielo se derrite, el agua pasa de esta…
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question 3 (1 point) identify the following three pairs of structures i…
I = stereoisomers, II = structural isomers, III = the same
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which of these molecules is not a resonance form of a b c d
D. Option D
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physical or chemical property? copper conducts electricity. physical ch…
Physical
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question 1 (1 point) determine the position of equilibrium of the follo…
reactants
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5) explain why two non - metallic elements are not likely form ionic bo…
Two non - metallic elements are not likely to form ionic bonds because non - metals have similar electronegativities and prefer to share electrons rather than transfer them as req…
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physical or chemical change?...iron reacts with oxygen to create iron o…
B. Chemical change
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which of the following is a physical property? 1 point copper reacts wi…
Aluminum is ductile and can easily be bent into a wire.
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read the following quote from a 1914 government report: \while the fact…
First question: The future of fishing may be in jeopardy if it continues unregulated Second question: Cities create their own microclimates and produce large amounts of solid wast…
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in march of 2023, the wal - mart distribution center caught fire in pla…
Geosphere: The geosphere was negatively impacted by pollution runoff, because the runoff from firefighting water can contaminate soil and groundwater. Hydrosphere: The hydrosphere…
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question 5 honi incorrectly remembered seeing butter in the fridge. thi…
A. schema
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question 1 1 pts after repeatedly hearing the pizza commercial jingle, …
Question 1: priming Question 2: representativeness heuristic
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12. which value of an element is calculated using both the mass and the…
Atomic mass
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11. complete the following sentence: isotopes of the same element have.…
the same number of protons, but different numbers of neutrons
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a cube with the following properties is observed: a. length: 4 cm b. he…
G, I, J
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6. the bohr model shows that electrons are found in a cloud surrounding…
spinning around the nucleus in specific paths
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4. exothermic reactions - always release energy never have reverse reac…
always release energy
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2. look at each of the following pairs of elements. predict whether eac…
(a) Yes, because Mg is a metal and O is a non - metal. (b) Yes, because Zn is a metal and Cl is a non - metal. (c) No, because both C and F are non - metals. (d) No, because both …
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parts of an isotope and ion use the atomic symbol to fill in the blanks…
See the above - filled table.
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chapter 4.1 - 4.3 vocabulary matching element symbol daltons law compou…
Element symbol: f Dalton's Law: k Compound: c Electrons: h Proton: m Isotope: e Mass Number: b Law of Conservation of mass: No match Atoms: j Chemical Formula: l Nucleus: g Neutro…
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worksheet - isotopes and average atomic masses name: jaliah d period: 6…
1. **Question**: Four isotopes of lead include 204 - lead, 206 - lead, 207 - lead and 208 - lead. The average atomic mass of a lead atom is 207.2 amu. Which isotope of lead is lik…
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the atomic mass for each element is reported on the periodic table. thi…
Argon - 40 is the most abundant isotope in nature because the reported atomic mass of argon (approx. 39.95 amu) is closest to the mass of argon - 40. 2.
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read the selection. jacques offenbach never imagined what would happen …
C. To show that complex lyrics can be memorable
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choose the correct answer. which of these is the atomic mass of cobalt …
58.933
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read pages 138 - 146. then, complete questions 1, 2, 3a, & 3b. 1. choos…
a. In making a case for raising the minimum wage, I am not saying that businesses will go bankrupt. b. But my argument will do more than prove that one particular industrial chemi…
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what number specifies the total number of protons and neutrons combined…
B. atomic mass
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friday 01/19 dual - credit sub plan worksheet: ch 40 met read pages 138…
1. a. In making a case for raising the minimum wage, I am not saying that businesses will go bankrupt overnight. b. But my argument will do more than prove that one particular ind…
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friday 01/19 dual - credit sub plan worksheet: ch 10 metacommentary (8 …
This is a writing - related task focusing on metacommentary in essays.
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which of these is the atomic number of calcium (ca)? 40.078 20 ca
20
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which of the following is a counterexample for this conditional stateme…
Helen, who is good at math and is a hockey coach
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parts of an isotope and ion use the atomic symbol to fill in the blanks…
See the above - filled table.
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balancing chemical equations suggestions: 1. use a pencil, so that you …
\(Ca(NO_3)_2+Cu_2SO_4 ightarrow CaSO_4 + 2CuNO_3\)
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which element has an atomic number of 74? rhenium technetium tungsten
Tungsten
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which element has an atomic number of 42? tungsten rhenium molybdenum
Molybdenum
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which element has 16 protons in its nucleus? selenium arsenic sulfur
Sulfur
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which element has 33 protons in its nucleus? arsenic selenium phosphorus
A. Arsenic
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which element has 20 protons in its nucleus? calcium potassium sodium
Calcium
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which elements would react most easily with each other? (1 point) an el…
1. an element with a high electronegativity and an element with a single valence electron
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which element listed would have the greatest electronegativity? periodi…
Fluorine (F)
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how are reactivity and electronegativity related? (1 point) elements wi…
An element will be more reactive if it has a very high or very low electronegativity.
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which elements on the periodic table are the least reactive? (1 point) …
the group with helium at the top
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which element would have the lowest electronegativity? (1 point) an ele…
an element with a small number of valence electrons and a large atomic radius
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12. when creating a graph, which variable is usually placed on the x - …
12. B. 自變量 13. E. None of the above 14. D. 它們相互滑動但有一定的體積 15. C. 蒸發（或汽化） 16. D. 凝華 17. C. 密度
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use the data table below to answer the following questions: | isotope |…
1. They have the same number of protons. 2. They have different numbers of neutrons and different atomic masses. 3. Average atomic mass is approximately $9.09$ amu, and the elemen…
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question 1 - 3 why does a layer of ice form on the surface of a pond du…
D. Molecules of water in the solid phase are less dense than those in the liquid phase.
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what is the measure of the gravitation force exerted on an object? weig…
Question 1: weight Question 2: protons Question 3: Definite volume, no definite shape, relatively incompressible
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atomic structure worksheet fill in the blanks for the elements in this …
| Element | Number of Protons | Number of Neutrons | Number of Electrons | Atomic Mass | Atomic Number | | ---- | ---- | ---- | ---- | ---- | ---- | | lithium | 3 | 4 | 3 | 7 | 3 …
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question 10 1 pts part 3: use the following phs to answer the questions…
B. detergent
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part 3: use the following phs to answer the question. ph of coffee = 3 …
more
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atoms - extra practice use your new skills to answer the following. wri…
1. Name: Nickel - 60, Isotope symbol: $^{60}_{28}Ni$ 2. Name: Barium - 135, Isotope symbol: $^{135}_{56}Ba$ 3. Name: Germanium - 73, Isotope symbol: $^{73}_{32}Ge$ 4. Name: Gold -…
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true or false: because the amount of solute and the volume of solution …
b. False
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examples of extensive property are _____. select all that apply a color…
B. Volume, D. Mass
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because the more water you boil the more time it will take (other condi…
b. False
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complete the sentence using one of the following words: intensive, exte…
intensive
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which of the following properties are examples of intensive properties?…
A. Temperature, B. Solubility, C. Color
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tap water: homogeneous mixture madison wi, water quality report 2024 wa…
| Substance | Symbol or Formula | Element or compound? | |--|--|--| | Iron | Fe | Element | | Manganese | Mn | Element | | Sodium | Na | Element | | Arsenate | $AsO_{4}^{3 - }$ | …
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what does electrical engineering deal with? devices and systems using e…
A. Devices and systems using electricity
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what field did engineering originally refer to? military engineering ci…
A. Military engineering
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which of the following are true statements about extensive properties? …
A. They include properties like mass and volume. C. They depend on the amount of matter in a sample. E. They change with the amount of matter.
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lack of friction heat exercise chemicals identify common pathology for …
epidermis
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9 what happens on the particle level when a substance melts? a a super …
B. The particles move from very close together to farther apart