化学
化学反応、化学量論、分子構造、元素の性質。
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using the as\ idea, how many electrons are \available\ for the compound…
14
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question complete the structure for butyl propanoate. • use molecular f…
$$\text{CH}_3\text{CH}_2\text{COOCH}_2\text{CH}_2\text{CH}_2\text{CH}_3$$
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using the as\ idea, how many electrons are eeded\ for the compound hocl…
18
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7 multiple answer 1 point which of the following factors favor an s_n2 …
A. Polar aprotic solvent, B. Strong nucleophile
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choose the correct answer. which of these work together to attach to ro…
C. pioneer species
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complete the structure for methyl pentanoate. • use molecular formulas …
$$\text{CH}_3\text{OCOC}_4\text{H}_9$$
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multiple choice 1 point which of the following best explains why methyl…
D. Methyl halides are sterically unhindered.
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multiple choice 1 point which of the following nucleophiles would likel…
KOH
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identify the correct statement from the choices below. select the corre…
B. In a carboxylic acid, the non - double - bonded oxygen bonds to a hydrogen atom; in an ester, it bonds to another carbon atom.
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multiple choice 1 point which of the following would be the best solven…
B. Acetone
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multiple choice 1 point which of the following statements best describe…
The rate depends on both the nucleophile and the substrate concentrations.
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question the naming of an ester is done by combining the names of the t…
The first part of the name comes from the alcohol portion of the ester.
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1. a student conducts an experiment to determine whether adding salt ca…
1. Using a different - sized pot for the control group. 2. Having a different heat source (e.g., a weaker burner) for the control group. 3. Starting with a different volume of wat…
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a carboxylic acid is neutralized with a strong base. fill in the chemic…
$CH_{3}CH_{2}COOH$; $OH$; $H_{2}O$
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question what would the first reduction product of butanoic acid be? se…
A. \( \text{CH}_3\text{CH}_2\text{CH}_2\text{CHO} \)
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a carboxylic acid can be reduced to form the alcohol ch₃ch(ch₃)ch₂oh, c…
The missing atoms or groups are \( -OH \), \( =O \), and \( -H \).
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ionic or covalent? 1. lif 2. b₂ 3. cacl₂ 4. mgso₄ 5. nh₃
1. Ionic 2. Covalent 3. Ionic 4. Ionic 5. Covalent
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identify the products when the benzoic acid undergoes complete neutrali…
sodium benzoate and water
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on halloween, you take a glow stick, crack the capsule inside and shake…
A. chemical
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question give the chemical formula of the alcohol that results from the…
\( CH_3(CH_2)_3CH_2OH \)
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match the example with the energy transformation it shows. some energy …
Steam turning a turbine in a power plant: thermal→mechanical; A solar panel powering a calculator: light→electrical; A plant using sunlight to make food: light→chemical; A student…
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what is the correct lewis structure for sicl4? n = 40, a = 32, s = 8, b…
The first structure (where Si is in the center, bonded to four Cl atoms, and each Cl has 3 lone pairs) is the correct Lewis structure for \(SiCl_4\)
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which is a leading theory for the formation of fossil fuels? a. nitroge…
C. Organic matter was compressed and heated.
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using the as\ idea, how many bonds are made in the compound sicl4? n = …
4
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using the as\ idea, how many electrons are \shared\ for the compound si…
\(8\)
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using the as\ idea, how many electrons are \available\ for the compound…
\(32\)
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using the as\ idea, how many electrons are eeded\ for the compound sicl…
40
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which is the correct lewis structure for pbr₃?
The third structure (the one with \(\colon Br\colon - P - \colon Br\colon\) and \(\colon Br\colon\) below \(P\), with all \(Br\) having 6 additional dots around them and \(P\) hav…
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the as\ values and number of bonds for hocl are as follows: n = 18, a =…
The second structure (with hydrogen having 2 electrons, oxygen having 8 electrons, and chlorine having 8 electrons) is the correct Lewis structure for hypochlorous acid (HOCl).
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there are 4 shared electrons in hocl. how many bonds does this represen…
2
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using the as\ idea, how many electrons are \shared\ for the compound ho…
4
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using the as\ idea, how many electrons are \available\ for the compound…
\(14\)
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using the as\ idea, how many electrons are eeded\ for the compound hocl…
18
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39. classify the following elements as metals, nonmetals, or metalloids…
| Metals | Nonmetals | Metalloids | |--|--|--| | Al, Na | Ar, H, F | Te | | Property of Metals: Good conductors of heat and electricity | Property of Nonmetals: Poor conductors of…
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match the following parts of the atom with their appropriate definition…
31. A, 32. E, 33. C, 34. F, 35. B, 36. D
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which chemical damages the protective ozone layer? a. nitrogen b. carbo…
D. Chlorofluorocarbons
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given the cascade of events leading to ischemia - produced brain damage…
glutamate
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which of the following is most likely to lead to an intracerebral hemor…
a bursting aneurysm
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select all answers that give either an example of or the meaning of the…
a playground that covers a lot of ground, a report on the history of every movie ever made
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why does the thermosphere have the highest temperature of all the atmos…
B. The sun’s radiation strikes it first.
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question 1 which of the following is a characteristic of all rocks? the…
they are a collection of minerals or a body of glass
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exit ticket: moles 4 fill in the blank 1 point calculate the mass of 6.…
\(286.27\)
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temperature is a physical property related to the average kinetic energ…
A. True
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choose the best answer for each. 8. which of the following is true abou…
8. C. They are formed between metals and nonmetals 10. B. Break apart into ions 11. B. They have strong electrostatic attractions between ions 12. B. They have strong electrostati…
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draw the lewis dot structures for... carbon selenium rubidium
- Carbon: \(\cdot\!\!\cdot\!C\!\!\cdot\!\!\cdot\) - Selenium: \(\cdot\!\!\cdot\!Se\!\!\cdot\!\!\cdot\) (with two more dots for a total of 6) - Rubidium: \(Rb\cdot\)
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which statement describes the bonds in iron sulfate (feso₄)? (1 point) …
Fe and S are ionically bonded, while S and O are covalently bonded.
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which statement best explains the difference between polar and nonpolar…
C. Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.
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which option contains an example of a polyatomic ion? (1 point) mgcl o₂…
\(KNO_3\)
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this image shows electronegativities of elements on the periodic table.…
fluorine (F)
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ionic compounds test review part 1: name → formula write the formula fo…
1. \(LiBr\) 2. \(CaS\) 3. \(CuCl_2\) 4. \(KNO_3\) 5. Barium oxide 6. Aluminum oxide 7. Iron(II) sulfate 8. Ammonium chloride
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approximately in which range of electronegativity differences would pol…
$0.5$ to $1.7$
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name the types of bonds... ** metal + non - metal = ionic || ** non - m…
| Compound | Element 1 | Element 2 | Bond Type | |--|--|--|--| | \(CCl_4\) | \(C=\) non - metal | \(Cl=\) non - metal | Covalent | | \(Fe_3O_2\) | \(Fe=\) metal | \(O=\) non - met…
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use your chemical bonds station notes to assist you with filling the bl…
1. bonds 2. i. Ionic bonds ii. Covalent bonds iii. Metallic bonds 3. ions 4. cations 5. anions
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3) mercury metal is poured into a graduated cylinder that holds exactly…
\( D = 13.375\space g/ml\), \(M = 428\space g\), \(V = 32\space ml\)
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multiple answer 1 point choose all of the following statements that cor…
A. The number of positive and negative ions in an ionic compound is sometimes equal. B. The formula unit of an ionic compound represents the simplest ratio between ions. C. Most o…
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a compound can be broken down into simpler substances by a a physical p…
B. a chemical process only
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1. true or false: according to the aufbau principle, electrons fill orb…
1. False 2. False 3. False 4. False 5. False 6. False 7. False 8. False 9. True 10. True
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6. elements with similar electronic configurations often exhibit analog…
- 6. d) Periodic Law - 7. c) Chemical reactivity - 8. a) Halogens - 9. b) Half - filled or fully - filled subshells - 10. d) Physical properties of matter
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1. according to the aufbau principle, electrons fill orbitals in which …
1. C. Based on increasing energy levels 2. A. Singly with parallel spins 3. B. Chromium (Cr) 4. C. Increasing number of protons 5. D. Increased effective nuclear charge
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a change that produces matter with a different composition is called a …
A. chemical change
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what substance forms when two or more elements combine chemically? a an…
D. a compound
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8. there are three major divisions on the periodic table: the “s block”…
s block: columns 1 - 2 d block: columns 3 - 12 p block: columns 13 - 18
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a substance made up of only atoms of one type is called a(n)___. enter …
element
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the lists the names, chemical symbols, and other important information …
The periodic table
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how are most elements found in nature? a as pure elements because eleme…
C. combined with other elements because elements are generally reactive
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a substance which cannot split up into two or more simpler substances b…
d. Element
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are elements considered to be substances? a yes, because they have a de…
A. Yes, because they have a definite composition
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lead (pb), silver (ag), and iron (fe) are examples of which of the foll…
C. elements
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select the item that best completes the statement. which of the followi…
Include warnings on products about the addictive chemical nicotine.
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are chemical hazards always visible? select the best option. yes no if …
B. No
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a pure substance that cannot be separated into any other substances is …
element
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which of the following is not an element? a copper (cu) b carbon (c) c …
d. water (H₂O)
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which element has the highest monetary value? a gold b lead c nickel d …
A. gold
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what is the name of the reference that lists all the known elements? a …
B. The Periodic Table of Elements
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do some research. find out as much as you can about the three gases tha…
| Nitrogen | Chlorine | Carbon dioxide | |--|--|--| | Colorless, odorless, flame goes out, does not turn cloudy | Green - yellow, pungent odor, supports combustion in some cases, …
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which statement is the most effective claim? organic foods are a health…
Organic foods are a healthier option than conventional foods.
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you see a faint mist hovering above a work area. could this be a visual…
Yes
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wearing ppe, using ventilation, and only using a chemical for limited a…
Remove the chemical hazards
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read the passage from sugar changed the world. we all crave sweetness, …
D. Sugar cane is no longer the main source of sweetness for most people.
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read the passage from sugar changed the world. no one could have seen i…
Advances in the production of sweeteners hastened the end of involuntary servitude.
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which statement about a chemical reaction is true? it occurs whenever a…
It occurs whenever a chemical change takes place.
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6. how can e - cigarettes be harmful to the environment? 1 point a. e -…
D. All of the above
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which indicator most likely suggests that a chemical change is taking p…
change of color
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two different liquids are mixed together. which observation indicates t…
a rise in temperature
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a solid is placed in a solution. which observation most likely indicate…
The solid has bubbles forming on its surface.
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when sodium metal is added to water, an orange flame is observed on the…
A chemical reaction occurs because heat and light are given off.
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a piece of limestone erodes due to acid rain. this process can be best …
slow chemical change.
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4. which chemical is addictive and toxic, especially for young people? …
A. Nicotine
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which term best describes the role of hydrogen gas in the formation of …
C. reactant
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burning a piece of wood in fire can be best described as a chemical cha…
chemical change because the atoms in wood and oxygen are rearranged.
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among these processes, which is the slowest chemical reaction? tarnishi…
tarnishing of silver
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the chemical formula shows how salt is produced. hcl + naoh → nacl + h₂…
HCl and NaOH
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1. there is no ______ in e - cigarette juice. * a. cancer causing chemi…
A. cancer causing chemical
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6. in a scientific investigation, what does the term variable refer to?…
6. b. A factor that can change during an experiment 7. c. Scientific theories explain a wide range of observations and are supported by multiple lines of evidence 8. b. Independen…
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which of the following is not true of silver? a. it has the highest ele…
C. It is a copper alloy, usually mixed tin as the main additive.
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is a durable material and is widely used for casting, which is a proces…
A. Bronze
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subatomic particles ii objectives: use the atomic number and mass numbe…
The table in part A is correctly filled as shown in the problem statement (with calculations verified). For part B, the number of protons for all carbon isotopes is \(6\), number …
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is not only the most valuable precious metal, but it is also both aesth…
D. Gold
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a precious metal is a. an element with super and electric and thermal c…
C. an highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.
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which of the following is true of iron? a. it has the highest electrica…
B. It can exist in many alloys, usually with a carbon base.