Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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question 12 a chemical reaction occurs where larger molecules are forme…
Dehydration synthesis
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review choose the best answers. 1.1)______is anything that takes up spa…
1.1) A. Matter 1.2) D. It is made up of particles that are too small to be seen. 1.3) C. Physical properties
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1. multiple choice 8 points which fossil fuel is used to make plastics,…
oil / petroleum # 2.
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question 1 of 10 an ionic bond is most accurately described as forming …
The transfer of electrons from one atom (typically a metal) to another atom (typically a nonmetal), resulting in oppositely charged ions.
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question 10 which of the following is the formula for uranium pentafluo…
D. \(UF_{5}\)
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which of the following is the formal charge on pcl₅? (reference p 226 o…
B. 0
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question 8 in sigma and pi bonding, multiple bonds consist of both sigm…
D. Double bonds have one sigma and one pi bond.
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question 7 1 point potassium is required in our diet. which of the foll…
D. \(K^{+}=1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\)
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question 6 where is the electron density concentrated in sigma bonds? (…
A. Between the two bonding atoms nuclei
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answer the following in complete sentences a graduated cylinder is fill…
The volume of the zinc is \(9.3\space cm^{3}\) and the mass is \(66.03\space g\)
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which of these molecules do not contain polar bonds? (reference p 240 o…
A. \(XeF_2\) (assuming the question was about non - polar molecules, as all bonds in the given options are polar. If strictly about non - polar bonds, there is no correct answer, …
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question 4 1 point based on their positions in the periodic table, whic…
D. Ba, Ti, W, B, N, F
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question 3 1 point ethene and acetylene are simple examples of double a…
D. Ethene: 5 sigma and 1 pi; Acetylene: 3 sigma and 2 pi
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question 2 how can you tell if an element is paramagnetic (weakly attra…
B. Unpaired electrons mean the substance is paramagnetic, paired means diamagnetic.
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how many kilts of heat are needed to raise the temperature of 15.0 g of…
D. 432 J
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how much energy must be absorbed by a 35 g sample of water at 53°c to h…
D. 85983 J (Note: There might be a miscalculation in the step - by - step above as the correct calculation \(Q = mc\Delta T=35\times4.18\times(100 - 53)=35\times4.18\times47 = 35\…
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using the following graph, identify the value of ( h_{vap} ) at point b…
B. -2200 J/g
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using the following graph, identify the value of ( h_{\text{waling}} ) …
B. -2260 J/g
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read the excerpt from \the environmental ethic\ it is fashionable in so…
All species are worth protecting because even the small organisms contribute important functions in the environment.
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the molecular geometry. follow the steps below and answer the questions…
- b. The shape is linear. - c. The shape is linear. The bonds push away from each other because of electron - pair repulsion (VSEPR theory). Electron pairs (bonding pairs here) re…
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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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what is the name of the compound al₂(so₄)₃
Aluminum sulfate
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what would be the chemical formula for the compound aluminum sulfate? a…
\(Al_{2}(SO_{4})_{3}\)
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what is the molecule polarity for the h₃o+ ion? metallic polar ionic no…
polar
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what is the bond polarity between h and o for the h₃o+ ion? polar ionic…
polar
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what is the closest bond angle around the central atom in the h₃o⁺ ion?…
\(109.5^{\circ}\)
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draw the lewis electron dot structure for h₃o⁺. what is the vsepr shape…
trigonal pyramidal
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what is the molecule polarity for the cs2 molecule? ionic polar metalli…
nonpolar
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steps to name compounds with polyatomic ions step 1: name the metal ste…
1. Barium nitrate 2. Lithium sulfate 3. Potassium hydroxide 4. Magnesium carbonate
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what statement best describes reaction 4? 3. hcl + naoh → h₂o + nacl + …
The energy is positive.
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two reactions gave potential energy graphs with some overlap. point \d\…
1) releases energy and 2) absorbs energy
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what is the polarity between the c and s bond for the cs2 molecule? con…
nonpolar
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question 6 1 pts chemical energy stored in the chemical bonds of an ene…
False
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what is the closest bond angle around the central atom in the cs₂ molec…
\(180^{\circ}\)
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draw the lewis electron dot structure for cs2. what is the vsepr shape …
linear
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what is the molecule polarity for the so₂ molecule? ionic polar metalli…
polar
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what is the bond polarity between s and o for the so₂ molecule? nonpola…
polar
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question 3 1 pts the energy associated with the random motion of atoms …
Thermal energy
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question 2 1 pts the electromagnetic energy from the sun that is emitte…
Radiant energy
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which statement best explains why carbon is central to macromolecules? …
It forms stable bonds and creates complex structures like carbohydrates and proteins.
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1 multiple choice 10 points which of the following is the formula for s…
$\ce{Na2CO3}$ (the third option)
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what is the closest bond angle around the central atom in the so₂ molec…
\(120^{\circ}\)
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draw the lewis electron dot structure for so₂. what is the vsepr shape …
bent
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what is the molecule polarity for the beh2 molecule? nonpolar polar met…
nonpolar
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what is the bond polarity between the be atom and the h atom in a beh₂ …
polar
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what is the closest bond angle around the central atom in the beh2 mole…
\(180^{\circ}\)
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draw the lewis electron dot structure for beh2. what is the vsepr shape…
linear
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what is the molecule polarity for the h₂s molecule? metallic nonpolar i…
polar
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what is the polarity between the h and s in the h₂s molecule? polar met…
polar
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what is the closest bond angle around the central atom in the h₂s molec…
\(90^{\circ}\)
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draw the lewis electron dot structure for h₂s. what is the vsepr shape …
bent
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warm up x give the chemical formula for the following compound: x tin (…
\(Sn(C_{2}O_{4})_{2}\)
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what is the missing particle? 144 58 ce* -> ? + 0 0 γ 144 58 ce 144 59 …
\(^{144}_{58}\text{Ce}\)
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what is the overall polarity of this molecule? polar nonpolar
nonpolar
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what is the overall polarity of this molecule? h-c≡c-h polar nonpolar
nonpolar
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what is the overall polarity of this molecule? polar nonpolar
polar
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what is the overall polarity of h - c≡n: this molecule? nonpolar polar
polar
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what is the overall polarity of this molecule? polar nonpolar
polar
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which rhyme scheme is used in this excerpt from \ballad of birmingham\ …
ABCB
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which best describes the solvent in a solution? a the substance that ge…
B. the substance that another substance is dissolved in
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which law relates volume and number of moles? a charless law b gay - lu…
For the first question: C. Avogadro’s Law For the second question: A. Charles’s Law
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part a which law relates pressure and temperature? a charless law b gay…
- Part A: B. Gay - Lussac’s Law - Part B: D. Boyle’s Law - Part C: (Since the options provided in Part C are incomplete, but based on the knowledge, the correct law is Avogadro’s …
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which of the following increases solubility of solids in liquids? a inc…
A. Increasing temperature
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a gas sample has a volume of 5.0 l and contains 1.5 moles of gas. if th…
10
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which best describes the solute in a solution? a the substance that ano…
B. the substance that gets dissolved
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part f what happens to the solubility of so₂ as the temperature rises? …
D. It decreases # Part G
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question 45 (5 points) match: outer layer of the kidney maintenance of …
1. outer layer of the kidney - 10. Cortex 2. maintenance of body temperature - 2. Thermoregulation 3. area inside of the cortex - 9. Medulla 4. carries filtrate from the proximal …
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which compound has the lowest solubility at 80 c? a so2 b nacl c kcl d …
First question: A. \(SO_2\) Second question: A. \(65g\) Third question: A. \(65^{\circ}C\)
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part a what is the solubility of ki at 10c? a 145 g b 7 g c 135 g d 18 …
C. \(135g\) # Part B
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part a what is the solubility of ki at 10c? a 145 g b 7 g c 135 g d 18 …
C. \(135g\) # Part B
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to prepare 0.66 moles of 0.5 m naoh, what volume of water would you nee…
D. 1.320 L
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if more water was added to a 3m cucl₂ solution to the 100ml mark, would…
A. No, the number of moles of solute would not increase because the volume of water has no effect on the number of moles of solute.
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the diagram on the left represents molecular - level particle drawings …
B. IV, III, II, I
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how many liters of solution are required to prepare a 0.20 m solution c…
C. 2.0 L
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if i have 17 moles of gas at a temperature of 67c and a volume of 88.89…
A. 5.3 atm
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calculate the number of moles of xenon gas that occupies a volume of 3.…
A. 0.143 mole
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jerry conducted an experiment to determine whether salt added to a cup …
An increase in the amount of salt increased the time needed for the samples to freeze.
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how many moles of solute are in 250 ml of 2.0 m hcl? a 0.75 mol b 0.25 …
C. \(0.50\space mol\)
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how many moles of solute are in 3.0 l of 2.0 m solution? a 3.0 mol b 0.…
C. 6.0 mol
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there are 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 …
D. 204.6 K
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what is the nature of a bond between hydrogen and hydrogen? nonpolar co…
Nonpolar Covalent
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what is the nature of the bond indicated? :\\ce{cl - cl}: polar covalen…
Nonpolar Covalent
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what is the nature of a bond between copper and zinc? polar covalent me…
Metallic
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what is the nature of the bond indicated? ionic metallic nonpolar coval…
Polar Covalent
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what is the nature of a bond between aluminum and chlorine which result…
Ionic
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ws: molecular geometry directions: you may use your vsepr chart and not…
1. Valence - Shell Electron - Pair Repulsion 2. Electron pairs around a central atom arrange to minimize repulsion, determining molecular shape. 3. | Molecule | Lewis Dot Structur…
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a chemical weathering process in which a mineral reacts with water to f…
hydrolysis
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type of weathering in which a rock reacts with air, water, or other age…
Chemical Weathering
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what is the definition of clout? * a small tool used for farming a dish…
C. Pull; influence
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what is the missing particle? 82 35 br → ? + 0 - 1 e 82 36 kr 82 35 kr …
\(\ce{^{82}_{36}Kr}\)
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what is the missing particle? ? → 3682 kr + -10 e 3582 kr 3582 br 3682 …
\(^{82}_{35}Br\)
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just as there are many forms of potential energy there are also many fo…
1. mechanical, electricity, light 2. fuels, oil, renewable, rate, run, wind, water, hydroelectric, geothermal
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questions: 1. define the term elemental groups of families: 2. give fou…
1. In the periodic table, elements with similar chemical properties are grouped together. These groups or families share common characteristics due to their similar electron confi…
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how do the structures in oads go ever ever on\ and \journey\ similarly …
Both authors use chronological sequence to show how life events happen one at a time.
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how are the structures of \journey\ and \the path ahead\ different? jou…
"Journey" uses a traditional rhyme scheme, while "The Path Ahead" does not.
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read the lines from \the path ahead.\ its a path _ we will walk _ side …
The ellipses and short phrases suggest a certain pace at which the poem should be read.
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unit 6 combo skills and vocabulary day 1 name: period: classifying a co…
1. \(H_{2}O\): C 2. \(Se_{2}Cl_{2}\): C 3. \(Na_{2}S\): I 4. \(BaSe\): I 5. \(CO\): C 6. \(PbBr_{2}\): I 7. \(CsCl\): I 8. \(Br_{2}O\): C 9. \(SCl_{2}\): C 10. \(CrF_{3}\): I 11. …
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in the below set of problems, pick the best answer from the given answe…
1. B. Ionic compound 2. A. formula unit 3. A. Law of Definite Proportions 4. C. compound 5. A. charge balance 6. A. covalent compound 7. C. octet rule 8. B. Lewis dot structure 9.…
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multiple choice identify the choice that best completes the statement o…
1. B. protons 2. D. 76 protons and 76 electrons 3. D. mass number 4. B. the mass number 5. B. number of protons 6. A. numbers of neutrons 7. D. mass numbers
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determine the formula weight of al₂(so₄)₃. provide an answer to two dec…
\(342.17\) amu