化学
化学反应、化学计量、分子结构与元素性质。
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how many of the following statements regarding daltons atomic theory ar…
D. 4
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a isotypes b ions c protons d electrons m neutrons n daltons theory did…
A. Isotopes, B. Ions, C. Protons, D. Electrons, E. Neutrons.
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question 7 the law of constant composition applies to a heterogeneous m…
C. compounds
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question 3 (1 point) many of the early discoveries of synthetic polymer…
silly putty
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question 2 (1 point) polymers are made of small, repeating units called…
monomers
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question 1 (1 point) what do silk, dna, nylon, cellulose, and styrofoam…
They are all polymers.
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learn by doing exposing a 100.0 ml sample of water at 0°c to an atmosph…
\(k = 7.16\times 10^{-4}\space g\cdot kPa^{-1}\), \(C_{g}=0.0725\space g/L\), and for the "Did I Get This" problem, the answer is \(2.8\space g\)
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periodic trends - electronegativity practice for each of the following …
1. Ge 2. Cl 3. F 4. Rn 5. Li < H < Be 6. In < B < I 7. Sr < Sn < Au 8. Sg < Mg < Pd 9. Na < Kr < O 10. Ti < Co < C 11. Ne < Rf < Se
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consider the following two salts, whose $k_{sp}$ values have been repor…
A. \(AgCl\)
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trends within periods • as you move left to right across a period, elec…
- Trends within periods: increases - Why do you think electronegativity increases as you go from left to right?: Increased nuclear charge and relatively constant electron - shell …
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electronegativity electronegativity - the ability of an atom to attract…
Electrons; To achieve a stable electron configuration (e.g., a full valence shell like noble - gas configuration).
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periodic trends - electronegativity practice for each of the following …
1. Ge 2. Cl 3. F 4. He 5. Li < Be < H 6. In < B < I 7. Sr < Sn < Au 8. Sg < Mg < Pd 9. Na < Kr < O 10. Ti < Co < C 11. Rf < Ne < Se
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what do the numbers mean? • the ________ an atoms electronegativity is,…
1. higher; attract 2. atoms
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poetic elements quick check what is rhyme scheme? (1 point) the rhyming…
the pattern of rhyming words at the end of each line in a poem
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3. what happens to the lead in used car batteries? 4. list two ways che…
3. The lead in used car batteries is often recycled. It can be melted, refined, and reused in new batteries or other lead - containing products. 4. - Develop more efficient and en…
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first calculate the heat required to increase the temperature of 25.0 g…
\(q_1 = 509\space J\) \(q_2 = 2.725\space kJ\) \(q_3 = 10695\space J\) \(q_{total}=13.9\space kJ\)
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which human activity contributes to the formation of acid rain? - cutti…
D. burning fossil fuels such as coal and gasoline
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multiple choice: write the letter of the correct choice in the blank. 4…
4. d. Relative concentrations depend on the reaction. 5. b. equilibrium shifts right 6. c. no effect on equilibrium 7. b. equilibrium shifts right 8. c. no effect on equilibrium
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when a commercial landfill becomes full, what happens next, according t…
A. A plastic cover, dirt, and grass seeds are added.
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rules for \filling\ energy levels: 1. pauli exclusion principle: one at…
C. a. Aufbau principle b. Pauli Exclusion Principle c. Aufbau principle d. Aufbau principle e. Hund's Rule D. 1. \(1s^{2}2s^{2}2p^{6}\) 2. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\) 3. \(…
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electron configuration objectives: draw an orbital diagram for a given …
|Orbital Name|Number of Orbitals|Max # of electrons| |---|---|---| |S|1|2| |p|3|6| |d|5|10| |f|7|14|
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the diagrams below show two pure samples of gas in identical closed, ri…
Sample A
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the diagrams below show two pure samples of gas in identical closed, ri…
Sample B
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the diagrams below show two pure samples of gas in identical closed, ri…
Sample A
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8. which of the following is the metallic ion in sodium fluoride? f 2+ …
\(Na^{1+}\)
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qe 4 table salt, nacl is a common ionic compound. sodium and chlorine a…
sodium has 1 additional valence electron it can give away in order to form a complete, stable octet shell.
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examine the lewis dot structure for potassium iodide. why are there 8 d…
- The valence electrons from potassium combine with those for iodine, adding up to 8. - Eight electrons is the maximum to fill the outer shell for this compound.
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question 13 (1 point) the number of significant figures in 0.040 is one…
two.
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2. a(n) ____ is the name given when atoms (whether identical or differe…
molecule
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question 7 (1 point) the number of significant figures in 10001 is two.…
five.
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which best describes the structure of the poem \safari day in kenya\? ○…
free verse with varied line lengths
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question 16 (1 point) the number of significant figures in 0.01500 is t…
four.
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32 the best lewis structure for ethyne (c2h2; commonly called \acetylen…
2 single bonds, 1 triple bond, and no lone pairs.
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hydrogen needs ____ electrons in its valence shell to be stable. * (0.5…
A. 2
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30 according to the octet rule most elements need ______ valence electr…
8
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29 in the lewis structure for the of2 molecule, the number of lone pair…
2
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28 what is the total number of electrons in the correct lewis dot formu…
26
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review the details below. dmitri mendeleevs periodic table contained on…
In 1869, Russian chemist Dmitri Mendeleev invented the first periodic table of the elements.
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23 sep construct an explanation use compound type to infer the relative…
The ranking from lowest to highest boiling point is \(N_{2}O < H_{2}O < NaF\).
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27 the correct dot formulation for nitrogen trichloride has: * (0.5 poi…
3 N - Cl bonds and 10 lone pairs of electrons.
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26 which one of the compounds below is most likely to be ionic? * (0.5 …
ScCl3
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which of the following recommendations will help you avoid exposure to …
Microwave food in ceramic containers instead of plastic containers.
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read this poem. feet pound pavement as miles pass, steady as tides, the…
- The poem has an abcb rhyme scheme. - Each stanza is a quatrain. - The poem contains two stanzas.
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read the poem. instruments poised, chins high not a blink, nor a sigh a…
abcb
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1. what makes water so unique? 2. why is water called a universal solve…
1. Water is unique due to its high specific heat capacity, existence in three states at normal Earth temperatures, and strong hydrogen - bonding properties. 2. Water is called a '…
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review the details below. marie curie was hired as the first female phy…
Scientist Marie Curie achieved several important milestones during her career.
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unit 3 worksheet 4 - quantitative energy problems part 2 energy constan…
\(77\space g\) (rounded to two significant figures)
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look at this dictionary entry. circumvent \\surk - kuhm - vent\\ verb c…
La primera oración ("Mrs. Thornton circumvented the crowds in Times Square by walking several blocks uptown.") usa correctamente la palabra "circumvent".
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look at this dictionary entry. noisome \ ol - suhm\\ adjective more noi…
The Environmental Protection Agency warns against pouring noisome chemicals down the drain.
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examine the lewis dot structure for potassium iodide. why are there 6 d…
- Second option: Eight electrons is the maximum to fill the outer shell for this compound. - Fifth option: The valence electrons from potassium combine with those for iodine, addi…
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qe 11. why does the element sodium (na) readily form compounds? select …
Losing one electron creates a stable electron arrangement. Sodium (Na) has just one valence electron which is easily lost.
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10. what is a lewis valence e-dot structure? a list of where all the el…
a representation of the valence electrons arranged around the nucleus of an atom
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what does the \cradle to grave\ principle in rcra emphasize? encouragin…
monitoring hazardous chemicals throughout their entire lifecycle
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9. what is the molar mass for... (nh4)2cro4
\(152.084\space g/mol\)
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the gallium in the image is melting in the persons hand. which changes …
The gallium atoms will gain potential energy, moving freely from each other.
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what is the best lewis/electron - dot structure for so₂? hint: which st…
D. Option d
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the 2022 nobel prize in chemistry was awarded to three pioneers in the …
B. Stanford,
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draw the best lewis/electron - dot structure for h₂so₄. how many single…
\(4;2;0\)
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challenge 4 based on what you just learned, put the following into the …
- **Ionic Compounds**: KF, Rb₂S, MgCl₂, NaBr, NiI₂, Li₂O - **Covalent Compounds**: Cl₂, CH₃Cl, NO, SCl₆, HCl, CF₄, CH₃COOH, SO₂ - a. transfer (or donate) - b. share
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what is the formal charge of nitrogen in the lewis structure below? sho…
\(0\)
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how many valence electrons does no₂⁻ possess? numeric type answer here
18
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for each statement below, write true or false. 6. ionic compounds are u…
6. True 7. False
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which chemical was used frequently as a pesticide until scientists real…
DDT
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there are several chemicals that can last for a very long time in an en…
DDT
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q 11 what is the primary geologic importance of the 4 stratigraphic pri…
They provide a framework for determining the the relative ages of rock layers and geological events, allowing scientists to reconstruct earths sequences and correlate rock layers …
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6. a substance has a half - life of 100,000 years. if the original amou…
12.5 g
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mechanical waves another type of mechanical wave is known as a longitud…
- Define It!: A longitudinal wave (compressional wave) is a mechanical wave where matter in the medium moves parallel to the wave's energy flow. - Write It!: Particles in a longit…
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i. configuration writing practice a. write a ground state electron conf…
1. \(1s^{2}2s^{2}2p^{6}3s^{1}\) 2. \([Xe]4f^{14}5d^{10}6s^{2}6p^{2}\) 3. \([Kr]5s^{2}\) 4. \([Rn]5f^{3}6d^{1}7s^{2}\) 5. \(1s^{2}2s^{2}2p^{3}\) 6. \([Kr]4d^{10}5s^{1}\) 7. \([Ar]3…
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demonstrate understanding 8. contrast the energy that can be released d…
31
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electron configuration practice chemistry name: due date: b. write a gr…
11. \(1s^{2}2s^{2}2p^{6}\) 12. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{6}\) 13. \(1s^{2}\) 14. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{8}\) 15. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\) 16. \(1s…
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precipitation can include all of the following except * rain snow hail …
- First question: condensation - Second question: runoff carrying chemicals into rivers
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which of the following is a physical property of minerals? choose one o…
A. color
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do now 3 (module 1 - lesson 3) question 2. a sample of a metal has a de…
\(20\)
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read the description below. use the definition of minerals to choose th…
D. Sandstone is not a mineral because minerals are pure substances.
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read the section below. which detail(s) show that fluorite is a mineral…
D. All of the above.
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color is a physical property of minerals. different minerals have diffe…
B. is hard to use as an identifying property.
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quartz is a mineral, but oil is not. minerals must be naturally occurri…
None of the options A, B, or C are correct based on the mineral - defining characteristics (naturally occurring, solid, not from living things, pure substance with a chemical form…
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to identify minerals, scientists look at their properties. properties a…
A. flammability
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1c. in your own words, describe three characteristics of minerals. writ…
Minerals are naturally occurring (formed in nature without human intervention), inorganic (not made from living things or their remains), and have a definite chemical composition …
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4. based on the periodic table shown, elements from columns b and e wil…
\(2B:3E\)
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based on the periodic table shown, elements from columns b and e will c…
The ratio of elements from column \(B\) to column \(E\) is \(2:1\).
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how does the authors use of free verse allow him to effectively express…
The use of free verse allows him to use unconventional rhythm.
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read the passage. how do architects use math to ensure that their build…
The question encourages the reader to challenge preconceptions they might have about math being irrelevant to standards of beauty.
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homework: moles & mass convert to moles (show all work & units to recei…
1. \(0.633\space mol\) 2. \(0.992\space mol\) 3. \(0.219\space mol\) 4. \(268.6\space g\) 5. \(18.65\space g\) 6. \(510.72\space g\) 7. \(0.274\space mol\) 8. \(841.44\space g\)
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drag the right word to its definition not made of or derived from livin…
inorganic
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drag over the word that goes best with the image property mohs scale h₂…
formula
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drag the right word to its definition a set of chemical symbols showing…
Formula
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drag the missing word into place the harder a mineral is, the less it c…
Mohs scale
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drag the right word to the words that mean the same thing attribute, qu…
Drag "property" to the circle with "attribute, quality, trait".
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drag the missing word into place minerals and some rocks are substances…
inorganic
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drag the right word to the words that mean the same thing gloss, shine …
luster should be grouped with gloss, shine.
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which of the following is corrosive? argon acid
Acid
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which of the following is considered toxic? water mercury
Mercury
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3. choose the best answer. the rate of motion over a certain amount of …
3. speed 4. Unbalanced
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5. choose the best answer. which force causes objects that are in conta…
5. C. friction 6. A. kinetic
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17. choose the best answer. what creates radio waves and light waves? f…
Magnetic and electric waves travel perpendicular to each other in radiation.
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1) sierra works in her parents sandwich shop. at the beginning of the y…
1. Approximately \(+14.29\%\) (the positive sign indicates an increase) 2. \(-12.5\%\) (the negative sign indicates a decrease) 3. Approximately \(-8.33\%\) (the negative sign ind…
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1) drag and drop the words with the descriptions. the energy needed to …
1. - the energy needed to break a chemical bond: bond energy - the average distance from the nucleus of one atom to the center of an atom bonded to it: bond length - when two part…
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3) choose the best answer. the overall charge on a covalent molecule is…
3. neutral or zero 4. are poor conductors of electricity
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which area represents where a molecule is in a state of equilibrium bet…
3