Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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which of the following describes a chemical property? * mass volume sta…
- For the first question (chemical property): Reactivity - For the second question (physical property): Color
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a process that changes one or more substances into new substances is a …
First question: Chemical change. Second question: Bubbles of gas (new substance) formed.
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the substances present before a chemical reaction are called: * subscri…
- First question: B. Reactants - Second question: D. Precipitate - Third question: D. To confirm the Law of Conservation of Matter is followed
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three states of matter by leslie cargile 1. atoms that are joined toget…
1. B. molecules 2. D. the shape of its container 3. B. It turns into a gas 4. A. warm temperatures 5. C. Molecules in a solid are more tightly packed than molecules in a liquid 6.…
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question 23 (2 points) name the organic product that is formed when 2 -…
2 - chloro - 2 - methylpentane
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question 22 (mandatory) (5 points) rank the following molecules from hi…
1. Ethanolic acid 2. Propanol 3. But - 1 - yne 4. Ethyl methyl ether 5. Butane
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so lets see if you remember that important concept. determine the numbe…
Helium has \(2\) valence electrons. Sulfur has \(6\) valence electrons. Magnesium has \(2\) valence electrons. Carbon has \(4\) valence electrons.
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the ionic compounds nacl and mgs are represented by the diagrams above.…
B. Diagram 1 represents \(NaCl\); it has a lower melting point than \(MgS\) because the coulombic attractions between its singly charged \(Na^{+}\) ions and the \(Cl^{-}\) ions ar…
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question 19 (1 point) which reaction is the everse\ of a condensation r…
d) hydrolysis
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which statement best helps to explain the observation that nh₃(l) boils…
C. \(NH_3\) has hydrogen bonding that is stronger than the dipole - dipole forces in \(PH_3\)
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écris correctement les adjectifs dérivés des verbes donnés entre parent…
a) des actions réfléchies b) l'angoisse éprouvée c) une confiance justifiée d) un coeur endurci e) la crainte suscitée f) des émotions partagées g) des impressions variées h) des …
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question 18 (1 point) which is true of markovnikovs rule? ○ a) it can b…
A. It can be used to predict the isomer that will be most plentiful in some addition reactions.
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the electron cloud of hf is smaller than that of f₂, however, hf has a …
D. Liquid F₂ has weak dispersion force attractions between its molecules, whereas liquid HF has both weak dispersion force attractions and hydrogen bonding interactions between it…
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the electron cloud of hf is smaller than that of f₂, however, hf has a …
D. Liquid \(F_2\) has weak dispersion force attractions between its molecules, whereas liquid \(HF\) has both weak dispersion force attractions and hydrogen bonding interactions b…
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the electron cloud of hf is smaller than that of f₂, however, hf has a …
D. Liquid \(F_2\) has weak dispersion force attractions between its molecules, whereas liquid \(HF\) has both weak dispersion force attractions and hydrogen bonding interactions b…
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question 71 different bonds are found in h₂o, co₂, and hcn. arrange the…
\(C\equiv N<C = O<H - C<H - O\)
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use the following information to answer the next question. the combusti…
D. 2, 9, 6, 6
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complete the table. iodine arsenic nitrogen sulfur tin
| Element | Symbol | Atomic number | Mass number | Protons | Neutrons | Electrons | Charge | | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | | Iodine | I | 53 | 129 | 53…
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which substances are actively transported from the blood into the filtr…
Hydrogen ions, potassium ions, and certain drugs.
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question 16 (1 point) nearly all organic reactions result in __________…
C. a mixture of products
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which of the following molecules contains only single bonds? a ch₃cooh …
B. \(C_2H_6\)
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part a: write the electron configuration for arsenic. part b: write the…
Part A: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3}\) Part B: Orbital diagram as described above (with filled orbitals following Aufbau, Pauli, and Hund's rules) Part C: \…
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a lewis diagram for the molecule c₂h₄ is shown above. in the actual c₂h…
C. \( 120^{\circ} \)
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which of the following bonds is most polar? a f-f b o-f c o-i d o-cl
B. O - F
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part d cd express your answer in condensed form in order of increasing …
[Kr]4d^105s^2
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use each of the terms below to complete the statements. atomic emission…
1. ground state 2. frequencies 3. lower 4. higher 5. electron 6. energy levels 7. atomic emission spectrum 8. do not 9. two 10. spherically shaped 11. \(n\) 12. electrons 13. thre…
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cd express your answer in condensed form in order of increasing orbital…
[Kr]4d^105s^2
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pb express your answer in condensed form in order of increasing orbital…
\[ [Xe]6s^{\wedge}24f^{\wedge}145d^{\wedge}106p^{\wedge}2 \]
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question 15 (1 point) a hydrolysis reaction can ___i____ an ester, and …
A. break apart, alcohol
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question 15 (1 point) a hydrolysis reaction can ___ i ___ an ester, and…
i. break apart; ii. combine water and alcohol. So the answer is row C.
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two pure elements react to form a compound. one element is an alkali me…
C. It contains ionic bonds.
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question 15 (1 point) a hydrolysis reaction can ___i___ an ester, and t…
A. break apart, alcohol
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question 14 (1 point) the reaction below is catalized by h₂so₄. ch₃cooh…
A. hydrolysis
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based on the lewis diagram for nh₃ shown above, the h - n - h bond angl…
C. \(109.5^{\circ}\)
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which of the dyes present here has a negative charge? check all that ap…
green
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question 16 of 20 write the full electron configuration for a k⁻ ion. e…
- Electron configuration of \(K^-\): \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}\) - Electron configuration of \(F^-\): \(1s^{2}2s^{2}2p^{6}\)
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use the following information to answer the next question. the molecula…
B. Ester
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which of the following complete lewis diagrams represents a molecule co…
D.
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a lewis diagram for the molecule c₂h₄ is shown above. in the actual c₂h…
C. \(120^{\circ}\)
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what do all the electron configurations have in common? all of the obta…
noble gases.
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the diagram above shows two resonance structures for a molecule of c₆h₆…
A. In the \(C_6H_6\) molecule, all the bonds between the carbon atoms have the same length.
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al^{3+} express your answer in complete form, in order of increasing or…
\(1s^22s^22p^6\) (entered as \(1s^{\wedge}22s^{\wedge}22p^{\wedge}6\))
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li+ express your answer in complete form, in order of increasing orbita…
\(1s^{\wedge}2\)
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when treating a 3rd - degree burn, you should: cool burn with ice. remo…
- When treating a 3rd - degree burn: Activate EMS or rush patient to the nearest hospital. - For a chemical splash in the eye: Rinse the eye under lukewarm water for at least 20 m…
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which of the following bonds is most polar? a f-f b o-f c o-i d o-cl
C. O - I
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question 12 (1 point) a carboxyl group is always _. a) at the beginning…
E. at the end of a chain
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p3- express your answer in complete form, in order of increasing orbita…
\(1s^{\wedge}22s^{\wedge}22p^{\wedge}63s^{\wedge}23p^{\wedge}6\)
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f- express your answer in complete form, in order of increasing orbital…
\(1s^22s^22p^6\)
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the elements c and se have the same electronegativity value, 2.55. whic…
B. The carbon - to - selenium bond is nonpolar covalent.
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cd express your answer in condensed form in order of increasing orbital…
[Kr]4d^105s^2
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cd express your answer in condensed form in order of increasing orbital…
[Kr]4d^105s^2
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question 11 (1 point) use the following information to answer the next …
d) 2,2 - dimethylpentanoc acid
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1 mark for review which of the following molecules has the shortest bon…
A. \(N_2\)
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part d al³+ express your answer in complete form, in order of increasin…
Part D: \(1s^{\wedge}22s^{\wedge}22p^{\wedge}6\) Part E: noble gases.
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15. an isotope has an atomic number 51 and a mass number 123. how many …
Protons: \(51\), Neutrons: \(72\), Electrons: \(51\)
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cd express your answer in condensed form in order of increasing orbital…
[Kr]4d^105s^2
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15. an isotope has an atomic number 51 and a mass number 123. how many …
16. d. Electrons are in "cloud - like" areas called orbitals outside of the nucleus. 17. d. all of the above. 18. a. \(1/12\) the mass of a carbon - 12 atom. 19. d. both the relat…
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cd express your answer in condensed form in order of increasing orbital…
\[ [Kr]4d^{10}5s^{2} \] In the required string format: \([Kr]4d^{\wedge}105s^{\wedge}2\)
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question 10 (1 point) which compound is a constitutional isomer of the …
d) pentane
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pb express your answer in condensed form in order of increasing orbital…
[Xe]6s^24f^145d^106p^2
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part b p³- express your answer in complete form, in order of increasing…
$1s^{\wedge}22s^{\wedge}22p^{\wedge}63s^{\wedge}23p^{\wedge}6$
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answer the following questions: 1. how can you defend the claim that ma…
1. In physical changes, no new substances are formed. The same atoms/molecules are present, so mass (a measure of matter amount) is conserved. 2. In chemical reactions, atoms are …
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sn express your answer in condensed form in order of increasing orbital…
[Kr]5s^24d^105p^2
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question 9 (1 point) which compound has one triple carbon bond? a) c₄h₆…
A. \(C_4H_6\)
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the energy required to dissociate an ionic solid into gaseous ions (lat…
D. The charge of the Mg cation is larger than that of the Na cation.
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sn express your answer in condensed form in order of increasing orbital…
[Kr]4d^105s^25p^2
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the particles in solid ki, a stable ionic compound, are arranged to max…
B.
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se express your answer in condensed form in order of increasing orbital…
[Ar]4s^23d^104p^4
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molten (liquid) nacl is represented by the particulate diagram shown ab…
B. It conducts electricity because ions are free to move.
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an organic compound with the molecular formula c₃h₇br(l) is a colourles…
A. 2 - Bromopropane
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underline the valence electrons. 1s²2s²2p⁶3s²3p⁶4s¹ 1s²2s²2p⁶3s²3p⁶4s¹ …
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\underline{4s^{1}}\) (the option with \(4s^{1}\) underlined)
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write full electron configurations for k. express your answer in comple…
\(1s^{\wedge}22s^{\wedge}22p^{\wedge}63s^{\wedge}23p^{\wedge}64s^{\wedge}1\)
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part f underline the valence electrons. $1s^{2}2s^{2}2p^{1}$ $1s^{2}2s^…
\(1s^{2}\underline{2s^{2}2p^{1}}\)
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write full electron configurations for b. express your answer in comple…
\(1s^22s^22p^1\)
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define and illustrate the following terms: mass law conservation law of…
- **Mass**: Measure of matter amount (e.g., 1 - kg iron block). - **Law**: Concise nature - relationship statement (e.g., Newton's laws). - **Conservation**: Quantity constancy in…
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write full electron configurations for n. express your answer in comple…
1s^22s^22p^3
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underline the valence electrons. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³ 1s…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}\underline{5s^{2}}4d^{10}\underline{5p^{3}}\)
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f-express your answer in complete form, in order of increasing orbital.…
1s^22s^22p^6
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sn express your answer in condensed form in order of increasing orbital…
\[ [Kr]4d^{\wedge}105s^{\wedge}25p^{\wedge}2\]
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part a se express your answer in condensed form in order of increasing …
[Ar]4s^23d^104p^4
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write full electron configurations for sb. express your answer in compl…
\(1s^22s^22p^63s^23p^64s^23d^{10}4p^65s^24d^{10}5p^3\)
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for each statement below, write (t) true or (f) false. 1. the number of…
1. \(F\) 2. \(T\) 3. \(T\) (for neutral atom) 4. \(T\) 5. \(F\) (most atoms are neutral) 6. Mass number (\(24\)) 7. Atomic number (\(12\)) 8. \(_{10}^{22}Ne\) 9. \(_{92}^{234}U\) …
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for each statement below, write (t) true or (f) false. 1. the number of…
The atomic mass of element \(X\) is approximately \(28.085\) amu and the element is silicon (Si).
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arrange the compounds below in decreasing order of the ionic character …
\(Cl_2\) (\(4\)) \(<\) \(SCl_4\) (\(3\)) \(<\) \(LiCl\) (\(2\)) \(<\) \(CsCl\) (\(1\))
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reviewing vocabulary match each definition in column a with the term in…
1. g 2. d 3. e 4. a 5. c 6. b 7. f 8. i 9. h 10. k 11. m 12. j 13. l Subatomic Particles and the Nuclear Atom: 1. c 2. a 3. b
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underline the valence electrons. 1s²2s²2p⁶3s²3p⁶4s¹ 1s²2s²2p⁶3s²3p⁶4s¹ …
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\underline{4s^{1}}\) (the second option in the given choices)
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which of the following correctly indicates whether the solid represente…
C. It does not conduct electricity because its ions cannot move freely within the solid.
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write full electron configurations for k. express your answer in comple…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}\)
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underline the valence electrons. 1s² 2s² 2p¹ 1s² 2s² 2p¹ 1s² 2s² 2p¹ 1s…
\(1s^{2}\underline{2s^{2}2p^{1}}\)
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the above structure is an isomer of a) butane b) octane c) hexane d) he…
d) heptane
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which of the following bonds is most polar? a f-f b o-f c o-i d o-cl
C. O - I
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part e write full electron configurations for b. express your answer in…
1s²2s²2p¹
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on the basis of the information above, which of the following arranges …
A. \(CH_4<SiCl_4 < SF_4\)
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part d underline the valence electrons. $1s^{2}2s^{2}2p^{3}$ $1s^{2}2s^…
\(1s^{2}\underline{2s^{2}2p^{3}}\) (the second option in the given choices).
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question 3 (1 point) the structure below is ________. h h h h | | | | h…
d) butane
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part c write full electron configurations for n. express your answer in…
\(1s^{2}2s^{2}2p^{3}\)
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the graph shows the potential energy of two atoms as a function of inte…
A. \(140\space kJ/mol\)
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practice a rearranging sentences beginning with here or there read each…
1. Snow is on the ground. 2. Money is in the bank. 3. A new way of looking at the problem is here. 4. Seven packets of oatmeal are left. 5. A hole is in the boat. 6. A get - rich …
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question 2 (1 point) consider the following structure of a compound: th…
C. propene
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which of the following ions has the same number of electrons as br^-? a…
B. \(Sr^{2+}\)