Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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the aufbau principle describes the order of subshells in an atom in ter…
1. Q. 3d 2. K. 4p
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the aufbau principle describes the order of subshells in an atom in ter…
1. I. 2p 2. J. 3p
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the complete electron configuration for cl is 1s² __1__ __2__ __3__ __4…
1. F. 2s² 2. M. 2p⁶ 3. P. 3s² 4. V. 3p⁵ 5. F. 2s² 6. M. 2p⁶ 7. P. 3s² 8. W. 3p⁶
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the complete electron configuration for na is 1s² __1__ __2__ __3__ the…
1. F. $2s^{2}$ 2. M. $2p^{6}$ 3. O. $3s^{1}$ 4. F. $2s^{2}$ 5. M. $2p^{6}$ 6. N. $3s^{0}$
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3s² signifies that the electrons are in shell number __1__ the electron…
1. D. 3 2. H. s 3. C. 2
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5 four materials are added to a vat of water. which materials will diss…
B. sugar, C. food dye
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give the maximum number of electrons allowed in each subshell s subshel…
1. C. 2 2. G. 6 3. K. 10 4. O. 14
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give the number of valance and core electrons for each. valence electro…
Mg has C. 2 valence electrons and K. 10 core electrons Mg⁺² has A. 0 valence electrons and K. 10 core electrons Ar has I. 8 valence electrons and K. 10 core electrons
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give the number of valance and core electrons for each. valence electro…
Mg has C. 2 valence electrons and K. 10 core electrons Mg⁺² has A. 0 valence electrons and K. 10 core electrons Ar has I. 8 valence electrons and K. 10 core electrons
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give the number of valance and core electrons for each. valence electro…
1. B. 1 2. K. 10 3. I. 8 4. C. 2 5. B. 1 6. S. 18 7. I. 8 8. K. 10
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give the number of valance and core electrons for each. valence electro…
O has G. 6 valence electrons and A. 2 core electrons \(O^{2 -}\) has I. 8 valence electrons and A. 2 core electrons Ne has I. 8 valence electrons and A. 2 core electrons
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give the number of valence and core electrons for each. valence electro…
O has G. 6 valence electrons and C. 2 core electrons O²⁻ has I. 8 valence electrons and C. 2 core electrons Ne has I. 8 valence electrons and C. 2 core electrons
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give the number of valance and core electrons for each. valence electro…
1. H. 7 2. C. 2 3. I. 8 4. C. 2 5. H. 7 6. K. 10 7. I. 8 8. K. 10
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for the nuclear reaction $^{110}_{47}ag\\to^{0}_{- 1}e+^{110}_{48}cd$. …
1. P. 5 2. P. 5 3. T. 1260 4. A. 200 5. I. Cd - 110
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for the nuclear reaction $^{110}_{47}ag \to ^{0}_{-1}e+^{110}_{48}cd$. …
1. N. 3 2. N. 3 3. E. 25.0 4. A. 200. 5. I. Cd - 110
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the sweet slice pie shop sells organic pies with locally - sourced ingr…
$\frac{2}{3}$
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according to the diagram, which statements describe the solutions immed…
The two solutions have different concentrations.
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according to the diagram, which statements describe the solutions immed…
Water is the solvent in both solutions.
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the atomic radius of an element or ion is affected by the attraction be…
1. B. smaller 2. A. larger 3. C. increases 4. D. decreases
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conclusion: what happens to the total number of atoms during a chemical…
- Conclusion: The total number of atoms remains the same during a chemical reaction. - What a coefficient tells: The number of molecules of a substance. - What a subscript tells: …
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electronegativity is the ability of an element to pull electrons toward…
1. A. negative 2. B. positive 3. D. higher 4. C. lower 5. E. lose 6. F. gain 7. C. lower 8. D. higher
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the group 17/vii elements are known as the halogens. answer the followi…
1. A. true 2. A. true 3. A. true 4. A. true
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question 7 (1 point) __1__ is in group 17/vii and this group is called …
1. D. Cl 2. G. halogens
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the group 18/viii elements are known as the noble gases. answer the fol…
1. A. true 2. B. false 3. B. false 4. B. false
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__1__ is in group 18/viii and this group is called the __2__ a. k b. ca…
1. C. Ne 2. H. noble gases
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question 4 (1 point) saved the group 2/ii elements are known as the alk…
1. B. false 2. A. true 3. A. true 4. A. true
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question 23 1 pts which of the following are compounds found in plants …
B. Phytochemicals
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question 11 the breaking of chemical bonds always requires an additiona…
True
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please use your periodic table as you answer the questions. take your t…
B. valence electrons
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question 8 1 pts which of the following is the branch of science that s…
Epidemiology
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question 4 what is the best definition of a compound? a substance with …
A substance with two or more different atom types bonded together
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question 1 1 pts which of the following is an organic nutrient (contain…
C. Vitamins
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question 3 match the element with the number of bonds it can make: carb…
Carbon: 4 Hydrogen: 1 Nitrogen: 3 Oxygen: 2
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biochemistry quiz t1 2024 2025 started: oct 8 at 9:45pm quiz instructio…
to become stable
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analysis: answer the following questions: 1. which molecules are not co…
1. Molecules made of only one type of element are not compounds, e.g., $O_2$. 2. Plastic sticks can be a simple visual representation but do not show electron - sharing directly. …
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compound, drawing of molecule, how many bonds does each element make? w…
| Compound | How many bonds does each element make? | |--|--| | Ammonia ($NH_3$) | N - 3 single, H - 1 single | | Oxygen ($O_2$) | O - 1 double | | Nitrogen ($N_2$) | N - 1 triple…
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question 3 1 pts this process adds hydrogen atoms to unsaturated fatty …
A. Hydrogenation
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question 2 1 pts this fatty acid does not pack tightly together due to …
C. Unsaturated fatty acid
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(c) what volume of 0.20 m nacl(aq) contains 10.0 g of nacl (molar mass …
$0.86\ L$ (rounded to two significant figures)
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complete the following table: | name | symbol | atomic number | mass nu…
The completed table is shown above.
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(a) ions in a certain volume of 0.20 m nacl(aq) are represented in the …
(a) For the particulate diagram of 0.10 M CaCl₂(aq), draw half as many Ca²⁺ ions as there are Na⁺ ions in the 0.20 M NaCl(aq) diagram and the same number of Cl⁻ ions as in the 0.2…
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question 8 1 pts trans fats are made by a process of adding hydrogen at…
B. Hydrogenation
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1. what is narrative poetry? poetry that is based on a formulaic patter…
C. Poetry that tells a story
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activity c (continued from previous page) 8 make a rule next to subshel…
8A. 5s 8B. 4f 8C. 6p 9. Cobalt (Co): 1s²2s²2p⁶3s²3p⁶4s²3d⁷ Germanium (Ge): 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p² Neodymium (Nd): 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f⁴ Gold (Au): 1s²2s²2p⁶…
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activity c: the diagonal rule get the gizmo ready • on the periodic tab…
1. The feedback is that the electron configuration is incorrect as 4s should be filled before 3d. 2. Yes; [Ar]4s¹ 3. [Ar]4s² 4. [Ar]4s²3d¹ 5. 5 orbitals; 10 electrons 6. Because t…
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activity b (continued from previous page) 6. interpret: select the atom…
6. Trends in atomic radius across periods and groups can be observed. 7. The atomic radius will increase from top to bottom within a chemical family. 8. Hydrogen radius: 37 pm; Li…
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average atomic mass for each element listed below, calculate their aver…
1. $K$: $39.13$ 2. $Cu$: $63.62$ 3. $Si$: $28.11$ 4. $Zr$: $91.32$ 5. $Ne$: $20.18$
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decide whether each row is a set of resonance structures for a single m…
1. yes 2. yes 3. yes 4. yes
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decide whether each row is a set of resonance structures for a single m…
1. yes 2. yes 3. yes 4. yes
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decide whether each row is a set of resonance structures for a single m…
1. no 2. yes 3. yes 4. yes
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16. the change of state from a solid directly to a gas is called ____.
Sublimation
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decide whether each row is a set of resonance structures for a single m…
1. yes 2. no 3. no 4. yes
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decide whether each row is a set of resonance structures for a single m…
1. no 2. yes 3. no 4. yes
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sublimation: solid to gas 15. why is solid carbon dioxide called “dry i…
Solid carbon dioxide is called "dry ice" because it sublimates (changes directly from a solid to a gas) rather than melting into a liquid like regular ice.
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14. for a substance to change from a gas to a liquid, particles must __…
lose energy
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condensation: gas to liquid 12. the change of state from a gas to a liq…
12. condensation 13. its boiling - point
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evaporation: liquid to gas match the correct definition with the correc…
8. b. evaporation 9. c. boiling 10. a. boiling point
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ionic or covalent? 1. n₂ 2. hf 3. co 4. nacl 5. mgo 6. alcl₃ 7. nf₃ 8. …
1. Covalent 2. Covalent 3. Covalent 4. Ionic 5. Ionic 6. Covalent 7. Covalent 8. Covalent 9. Covalent 10. Covalent
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freezing: liquid to solid 6. a substances ______________ is the tempera…
Freezing point
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5. the temperature at which a substance changes from solid to liquid is…
melting - point
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complete the statements. when a substance melts, it changes from the ph…
When a substance melts, it changes from the solid phase into the liquid phase. When this happens, the particles' kinetic energy partially overcomes the intermolecular forces holdi…
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melting: solid to liquid 4. could you use gallium to make jewelry? why …
No, because gallium has a low melting - point and would easily melt under normal wearing conditions.
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2. when a substance changes from one physical form to another, we say t…
physical change
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which statements best describe the process of radioactive decay? check …
An unstable isotope changes until it reaches a different element that is stable. An unstable isotope changes until it reaches a different isotope of the same element that is stabl…
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glucose, a simple sugar, has a melting point of 146°c. which of these d…
above 0°C
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draw the simplest set of curved arrows that shows how the structure on …
1. Lone pairs: Oxygen has 2 lone pairs and nitrogen has 1 lone pair. 2. Curved arrows: Start the first curved arrow from the lone pair on nitrogen and point it towards the adjacen…
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molecule functional group ch₃ - ch₂ - ch₂ - ch = o aldehyde ch₃ | ch₃ -…
Amine, Alcohol, Alkyne
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multiple - choice question what is the specialized protection setup tha…
B. blood brain barrier
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1. complete the table below by providing a set of quantum numbers for t…
1. For the last four electrons in a phosphorus atom: - \(n = 3\), \(l = 1\), \(m_l=-1\), \(m_s=+\frac{1}{2}\) (other valid combinations for \(m_l\) and \(m_s\) are also possible f…
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which of the following molecules demonstrates a square pyramidal molecu…
None of the above
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which of the following molecules demonstrates a square pyramidal molecu…
C. $XeF_4$
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12. circle the wave above that has the higher amplitude. 13. which elec…
12. Wave 2 13. B. Gamma rays 14. The left - hand wave in the pond wave picture 15. A. Faster
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1. os full noble gas rules of electron configurations which of the foll…
7. Violated rule: Aufbau Principle. Explanation: 2s not fully filled before 2p filling. 8. Violated rule: Aufbau Principle. Explanation: 3s empty while 3p has electrons. 9. Violat…
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record 500023821@fjuhed.org as the email to be included with my respons…
B. 1 AMU
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noble gas configuration 1. ar 4s²3d⁷: 2. he 2s²2p²: 3. xe 6s²: 4. he 2s…
1. Co 2. C 3. Ba 4. Li 5. Zr 6. Hg a. Full: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³, Noble gas: [Ar] 4s²3d¹⁰4p³ b. Full: 1s²2s²2p⁶3s²3p⁶4s²3d², Noble gas: [Ar] 4s²3d² c. Full: 1s²2s²2p⁶3s²3p², …
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question 14 (1 point) which of the following molecules demonstrates a s…
XeF_4
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question 13 (1 point) using the vsepr theory, predict that the shape of…
linear
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question 12 (1 point) which of the following molecules is linear in sha…
$CO_2$
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draw the lewis structure created by the curved arrow. write in formal c…
H<sub>3</sub>C<sup>-</sup>-N<sup>+</sup>H<sub>2</sub> (with the negative formal charge on carbon and positive formal charge on nitrogen)
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question 11 (1 point) using vsepr theory, predict the shape of a molecu…
B. trigonal planar
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question 10 (1 point) using the vsepr theory, predict that the shape of…
trigonal pyramidal
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multiple - choice question if the environmental engineer is going to us…
A. Electrical Engineer
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question 9 (1 point) vsepr predicts an sbf5 molecule will be which of t…
trigonal bipyramidal
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question 7 (1 point) a molecule exhibits the trigonal bipyramidal shape…
Five
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consider this organic reaction: draw the major products of the reaction…
Draw the product where the chlorine atom in the starting material is replaced by an $\ce{ - OCH2CH3}$ group with an inverted configuration at the chiral center.
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question 6 (1 point) a molecule exhibits the trigonal planar shape. how…
Three
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draw the structure of all products of the mechanism below.
$H_3C - C(=O^+H)-OH$
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question 5 (1 point) molecules or ions with a tetrahedral shape include…
i. and iii. only
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question 4 (1 point) the geometry of the icl2 - molecule is best descri…
linear
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draw the structure of all products of the mechanism below.
$CH_3CH = CHCH_3$
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18. ammonium hydroxide 19. barium sulfate 20. barium chloride 21. cobal…
18. $NH_4OH$ 19. $BaSO_4$ 20. $BaCl_2$ 21. $CoCl_2$ 22. $Na_2CO_3$ 23. $CaO$ 24. $Pb(NO_3)_2$ 25. $SnCl_2$
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question 3 (1 point) saved which of the following compounds demonstrate…
A. SF₆
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1. sodium nitrate _ 2. calcium carbonate _ 3. magnesium oxide _ 4. ammo…
14. $NaI$ 15. $NH_4OH$ 16. $KIO_3$ 17. $PbO_2$ 26. $AlCl_3$ 27. $Fe(OH)_3$ 28. $NaC_2H_3O_2$ 29. $Ca(OH)_2$ 30. $NaIO_3$ 31. $Ni(NO_3)_2$ 32. $FeCl_2$ 33. $MgBr_2$ 34. $NH_4NO_3$ …
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name ryleigh maguire chemistry naming extra credit 1. sodium nitrate __…
1. $NaNO_3$ 2. $CaCO_3$ 3. $MgO$ 4. $(NH_4)_2S$ 5. $PbSO_4$ 6. $NaCN$ 7. $KOH$ 8. $AgCl$ 9. $Fe(OH)_3$ 10. $Sn(ClO_4)_4$ 11. $K_2CO_3$ 12. $AgNO_3$
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master chow needed help with his chemistry experiment so the scientists…
Add a Comma
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which indication of chemical reaction is not observed in this experimen…
D. energy (temperature) change
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the calibration is to the 1 ml, so we do not estimate another place val…
37 mL
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question 2 (1 point) which of the following pairs is considered to be i…
Br⁻ and Kr
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unit exam - chemistry is a laboratory science. what is the calibration …
C. $1^{\circ}C$
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unit exam - chemistry is a laboratory science. the dart thrower was aim…
precise but not accurate