化学
化学反応、化学量論、分子構造、元素の性質。
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what is the best way a student can learn chemistry in this class? havin…
Exploring the elements that make up life and how their properties can help us find extraterrestrial life.
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what are the key differences between ionic and covalent compounds in te…
C. All of the above
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match the following terms to their correct descriptions: ionic bonds co…
Ionic Bonds: A bond formed by the transfer of electrons between atoms. Covalent bonds: A bond formed by the sharing of electron pairs between atoms. Hydrogen bonds: A bond between…
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if water was not available on another planet, which of the following su…
A. Ammonia (\(NH_3\))
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waters role in transferring electric charge comes solely from its abili…
B. False
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carbon is the only element that forms long chains, making it fundamenta…
True
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which of the following patterns can be predicted/ guessed from an eleme…
All of the above.
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missed this? watch kcv 6.4, iwe 6.4, iwe 6.5; read section 6.4. you can…
\(1\)
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what is the bond order in c₂⁺? 0 1.5 2.5 2.0
1.5
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tetrahedral sp³d sp sp³d² sp² sp³ submit request answer part d trigonal…
For tetrahedral: \(sp^{3}\). For trigonal bipyramidal: \(sp^{3}d\).
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linear submit request answer part b trigonal planar
For linear: \(sp\) For trigonal planar: \(sp^{2}\)
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in section 5.6, we learned that double bonds are stronger and shorter t…
C. Because according to valence bond theory, a double bond is actually composed of two different kinds of bonds, one σ and one π.
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examine the following valence bond representation of a bond: which of t…
Found in a double or triple bond
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describe a sigma bond. s orbital overlapping with the side of a p orbit…
end to end overlap of p orbitals
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give the hybridization for the c in c₂f₂. sp³d² sp³d sp³ sp² sp
sp
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identify the number of electron groups around a molecule with sp² hybri…
3
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list the number of sigma bonds and pi bonds in a double bond. 2 sigma, …
1 sigma, 1 pi
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how many of the following molecules have sp³d hybridization on the cent…
2
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consider the molecule below. determine the hybridization at each of the…
C1 = \(sp^{2}\), C2 = \(sp^{3}\) (the fourth option in the given multiple - choice list)
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a molecule containing a central atom with sp³d hybridization has a(n) _…
trigonal bipyramidal
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a molecule containing a central atom with sp² hybridization has a(n)___…
trigonal planar
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a molecule containing a central atom with sp hybridization has a(n) ___…
linear
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part a which molecule is polar? sf₂ cs₂ pcl₅ bf₃
\(SF_2\)
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determine whether each molecule is polar or nonpolar. drag the appropri…
- Nonpolar: \(SF_{6}\), \(SiCl_{4}\) - Polar: \(CF_{2}Cl_{2}\), \(PCl_{3}\)
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identify whether each molecule given below is polar or nonpolar. drag t…
- **Polar**: \(CHCl_{3}\), \(SBr_{2}\), \(BrF_{3}\) - **Nonpolar**: \(BF_{3}\)
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identify the molecular geometry of sih4. tetrahedral trigonal planar oc…
tetrahedral
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what is the geometry of the sef₆ molecule? its lewis structure is
Octahedral
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conceptual connection 5.4 - enhanced - with feedback part a which molec…
\(\ce{H2SO4}\)
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missed this? watch kcv 5.4, iwe 5.6; read section 5.4. you can part a w…
0
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use formal charges to identify the better lewis structure between the f…
The better Lewis structure is structure II because it has fewer atoms with nonzero formal charges.
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how many valence electrons must be accounted for in the lewis structure…
\(20\)
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missed this? watch kcv 5.2; read section 5.2. you can click on the re p…
P and H
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missed this? watch kcv 5.2, read section 5.2 you can click on the revie…
Si and O
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you may want to reference (pages 169 - 174) section 4.6 while completin…
\(CsCl\)
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missed this? read section 4.2. you can click on the review link to acce…
- Molecular: \(PCl_3\), \(SO_3\) - Ionic: \(Fe_2O_3\), \(NaI\)
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explain the difference between an ionic bond and a covalent bond. drag …
1. Ionic bonds, which occur between metals and nonmetals, involve the transfer of electrons from one atom to another. 2. Covalent bonds, which occur between two or more nonmetals,…
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true/false: the corona layer is the least dense and coolest layer of th…
Because nuclear fusion in the core releases enormous amounts of energy
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arrange the following elements in order of decreasing electronegativity…
fluorine > phosphorus > manganese > cesium
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question 5 what does a molecular formula tell us? the shape of the mole…
The type and exact number of atoms in a molecule or compound
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what is the name of the compound na₂so₄? sodium sulfide sodium sulfur s…
- First question: Sodium sulfate. - Second question: \(NO_3^-\).
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which of the following best describes an ionic compound? a compound for…
First question: A compound formed by the transfer of electrons between metals and nonmetals. Second question: \(Ca^{2 + }\) and \(Cl^{-}\).
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7. you have been tasked to create a colourless liquid with an apple odo…
First, oxidize propanol (\(CH_3CH_2CH_2OH\)) to propanoic acid (\(CH_3CH_2COOH\)) (oxidation reaction). Then, convert an alkene (e.g., 1 - pentene \(CH_2 = CHCH_2CH_2CH_3\)) to pe…
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question 8 the text describes research that documents the increase in t…
b. Schemas are defined as categories or classes of related items. Prior to blind auditions, judges did not include women within the category of "musician".
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question 3 olives and tomatoes are a. exemplars; fruit concept b. proto…
B. prototypes; fruit category
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which of the following would occur in an individual if they had their s…
Difficulty absorbing vitamin B12
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in this performance task you will answer four questions. the electron c…
Atom X = 1, Atom Y = 7 (the third option)
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in this performance task, you will answer 4 questions. the united natio…
It has a full valence shell of electrons, It is relatively unreactive.
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read the passage and answer the next two questions. during a classroom …
Ca, it belongs to Group 2
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these three figures show that in a game of tug - of - war, the knot in …
The electronegativity difference $\Delta EN = 2.1$. Since $\Delta EN>1.7$, the bond in $NaCl$ is ionic. In the tug - of - war analogy, the figure where one side completely pulls t…
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read the excerpt from \tools of the spymaster.\ james jays invisible in…
James Jay’s system required two chemicals for writing and reading invisible ink messages.
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complete the rhyme scheme. a a b b when you and i were young, we knew t…
A, B, B, A
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balance the reaction, do not leave any fractions, dont leave anything b…
1. \(3\) 2. \(2\) 3. \(6\) 4. \(1\) 5. V (single displacement) 6. Z (yes) 7. EE (reduced) 8. DD (oxidized) 9. AA (no)
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welding use the information below to answer the question. when consider…
It plays a pivotal role in creating sound structures.
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during our fuel reactions, what happened to the matter/mass of each fue…
Mass was lost
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true or false. matter is rearranged when fuels burn which releases ener…
True
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during our fuel demonstration, we burned various substances and tried t…
Carbon Dioxide (\(CO_2\))
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create the formula for magnesium phosphate by dragging and dropping the…
\(Mg_{3}(PO_{4})_{2}\)
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substance remaining constant? a - b, c - d, e - f b - c, d - e b - c on…
B. B - C, D - E
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when salt is dissolved in water, the resulting solution is a... homogen…
homogeneous mixture
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a student has a sample of an element. which describes a trait the sampl…
The sample is made of only one type of atom.
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the following statements is correct? toothpaste is more basic than hous…
Household ammonia is more acidic than bleach.
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when salt, vinegar and spices are mixed in oil, the resulting solution …
heterogeneous mixture
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read the excerpt from \tools of the spymaster.\ james jays invisible in…
James Jay created an invisible ink system that required two chemicals.
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correctly describes what each of the substances is? substance y is a co…
Substance X is a compound, substance Y is an element and substance Z is a mixture.
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periods are a horizontal row (left to right) vertical row (top to botto…
horizontal row (left to right)
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how many groups are on the periodic table
18
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a chemical reaction is represented by the following word equation. zinc…
- First part: Single - displacement reaction - Second part: - a) False - b) False - c) False - d) True
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groups are the vertical columns (top to bottom) horizontal columns (lef…
vertical columns (top to bottom)
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mixture begins to bubble. when the bubbling stops, trinity finds the ma…
A gas has formed and left the mixture.
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what does the law of conservation of matter state? matter cannot be cre…
Matter cannot be created or destroyed.
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samples of four different substances 1 2 3 4 represents a pure substanc…
substances 1 and 2
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there is a law that explains that matter cannot be created nor destroye…
Law of Conservation of Matter
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which statement describes the law of conservation of mass? matter is ne…
Matter is neither lost nor gained during a chemical change
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a chemical reaction is represented by the * following word equation. zi…
zinc nitrate and lead # 2. Reactants
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object likely from points a to b? liquid plasma solid gas
Solid
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6. a magnet was placed near a pile that contained both iron and aluminu…
- **Question 6**: It is a heterogenous mixture of aluminum and steel that can be separated by magnetism - **Question 7**: They are all made up of atoms - **Question 8**: suspensio…
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point on the graph represents the boiling point? d c e b
E
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1. which would be the best tool to separate a mixture of sand and water…
1. filter 2. element 3. False 4. atom 5. Column A: Elements Column B: Compounds
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a student has a sample of an element. which describes a trait the sampl…
The sample is made of only one type of atom.
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the air we breathe contains different individual gases (mostly nitrogen…
Mixture
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5. sep develop models the chemical equation below is written with molec…
\(C + O_2=CO_2\)
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when salt is dissolved in water, the resulting solution is a... compoun…
homogeneous mixture
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what is the little number after an element in a chemical equation calle…
Subscript
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what coefficients are needed to balance the following chemical equation…
1, 2, 1, 1
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27. write the formula for sodium cyanide (0.5 points) * enter your answ…
\(NaCN\)
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28. name the following ion: na2s (0.5 points) * enter your answer 29. n…
28. Sodium sulfide 29. Beryllium phosphide 30. Aluminum ion
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24. write the formula for ammonium chromate (0.5 points) * enter your a…
\((NH_4)_2CrO_4\)
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21. name the following ion: o2- (0.5 points) * enter your answer 22. na…
21. Oxide ion 22. Chloride ion 23. Ammonium hydroxide
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20. name the following ion: sr2+ (0.5 points) * enter your answer
Strontium ion
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19. which of the following is true regarding the formation of the bariu…
When barium forms an ion, it loses two valence electrons.
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17. write the formula for lithium phosphide. (0.5 points) * enter your …
17. \(Li_3P\) 18. \(N^{3 -}\) (corresponding to the option \(N^{3-}\) in the multiple - choice)
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16. what ion would a stable atom of calcium form? (0.5 points) * ca²- c…
\(Ca^{2 +}\)
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15. which of the following would have the same electron configuration a…
\(Mg^{2+}\)
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multiple choice 1 point elements in a group of the periodic table are d…
Alkali metals
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electron configurations can be represented in an abbreviated form also …
C. Zirconium - [Kr]5s24d2
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16 multiple choice 1 point what is the noble gas configuration for an a…
\([Ar]4s^{2}3d^{10}4p^{2}\) (the fourth option) ### Question 17
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13. name the following ion: k+ (0.5 points) * enter your answer 14. wha…
Potassium ion ### Question 14
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which element is the most reactive nonmetal, most electronegative, and …
- First question: C. Fluorine - Second question: D. Noble gases
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12 multiple choice 1 point which of the following best explains why men…
12. Atomic number had not yet been discovered. 13. \(Zn\)
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some physical properties of elements in a group of the periodic table a…
Halogens