Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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litio configuración electrónica del átomo neutro diagrama orbital del á…
Configuración electrónica del átomo neutro de litio: \(1s^2 2s^1\) Diagrama orbital: \(1s\) con \(\uparrow\downarrow\), \(2s\) con \(\uparrow\), y \(2p\) con los tres cuadros vací…
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4. if an atom gains an electron, it becomes a(n): anion with a negative…
A. Anion with a negative charge
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2 in a water (h₂o) molecule, the bond between oxygen and each hydrogen …
B. Polar covalent bond.
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litio configuración electrónica del átomo neutro ______________________…
- Configuración electrónica del átomo neutro: $1s^2 2s^1$ - Diagrama orbital (llenado): - 1s: $\boldsymbol{\uparrow\downarrow}$ - 2s: $\boldsymbol{\uparrow}$ - 2p: $\boldsymbol{\s…
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describe how to use le chatelier’s principle to predict the possible wa…
what happens to the equilibrium when the temperature increases or decreases, what happens to the equilibrium when the concentration of the reactants increases or decreases, what h…
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1. solid air fresheners probably shrink because they undergo sublimatio…
A. TRUE ### Question 2
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summarizing the use of le chatelier’s principle to predict shifts in eq…
Le Chatelier’s principle states that if a dynamic equilibrium is disturbed by changing the conditions (concentration, temperature, pressure/volume), the position of equilibrium sh…
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1. solid air fresheners gradually shrink because they undergo sublimati…
a. TRUE ### Question 2
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or the last 2 questions, write the answer on the bottom. write the chem…
\( K_2S \) ### For naming \( Fe(OH)_3 \):
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summarizing the possible values for the reaction quotient and correspon…
Q > Kₑq System will shift toward reactants Overabundance of reactants System will shift toward products
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sublimation worksheet visit ck12.org for free online practice 1. solid …
a. TRUE ### Question 2
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question 26. which material should never be placed in the microwave? a.…
B. metal
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1. solid air fresheners gradually shrink because they undergo sublimati…
A. TRUE ### Question 2
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determine whether each statement is true or false. if the oceans absorb…
True ### Second Statement:
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an element with mass 430 grams decays by 27.4% per minute. how much of …
# Explanation: ## Step1: Identify the decay formula The formula for exponential decay is $A = P(1 - r)^t$, where $A$ is the final amount, $P$ is the initial amount, $r$ is the rat…
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what are the reactants and products of a combustion reaction? sort each…
Reactants: oxygen, carbon - based fuel Products: water vapor, carbon dioxide
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determine how carbon moves during each process. complete the table. | |…
| Process Description | Chemical weathering | Gas exchange | Limestone formation | |---------------------|---------------------|--------------|---------------------| | Carbon move…
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determine which description refers to each term. complete the table. | …
| Description | Chemical weathering | Gas exchange | Limestone formation | | --- | --- | --- | --- | | During this process, rocks on land are broken down by carbonic acid, forming…
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unsaturated and saturated lipids exhibit different characteristics base…
C. contains the maximum number of hydrogen atoms
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how do chemical weathering, gas exchange, and limestone formation help …
All the options are correct: - Ocean chemistry is regulated in part by the exchange of $\ce{CO_{2}}$ gas between the atmosphere and the ocean. - Marine organisms break down $\ce{C…
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how does carbon move during each process? match each process to its bes…
1. gas exchange - Carbon moves from the atmosphere to the hydrosphere or from the hydrosphere to the atmosphere. 2. chemical weathering - Carbon from the atmosphere interacts with…
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match each term to its description. limestone formation gas exchange ch…
First row (description about fossilized marine organisms and sediment): limestone formation Second row (description about carbon dioxide in ocean water): gas exchange Third row (d…
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read the following poem and answer the question. flames dance where nee…
C. The imagery of flames and scars emphasizes the impact of fire on the forest.
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8. which graph correctly shows the effect of heat energy on the motion …
The graph at the bottom - right (the one with the positive - sloped line, under option 2)
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11. match the vocabulary words to their definition. draggable item\t\t\…
soil profile → A vertical sequence of soil layers transported soil → Soil that has been moved to a location away from its parent bedrock chemical weathering → The process by which…
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inhalants are chemicals that people breathe to experience some type of …
d. All of the above #### Question 50:
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a. bao barium oxyg b. cabr₂ calcium bro c. aln aluminum n d. cucl₂ copp…
a. \( \text{BaO} \): Barium oxide b. \( \text{CaBr}_2 \): Calcium bromide c. \( \text{AlN} \): Aluminum(III) nitride d. \( \text{CuCl}_2 \): Copper chloride(II) e. \( \text{Fe}_2\…
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question 2. name the binary ionic compounds indicated by the following …
a. Barium oxide b. \(CaBr_2\):
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question 1. a student is learning how to name binary ionic compounds. t…
- If the metal can form more than one type of ion, the charge is indicated in the name using Roman numerals. - The nonmetal is named by taking the root of its element name and add…
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solution. concluded an experiment and found that there was a high conce…
C. 11
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fossil fuels are made up of carbon - based molecules that have been com…
released... released
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5/10 what defines a saturated fat? it has double bonds in its hydrocarb…
D. It is bonded to as many hydrogens as possible
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fossil fuels are made up of carbon - based molecules that have been com…
When fossil fuels burn, much of the energy is \boxed{released} in the form of \boxed{heat}, and carbon is \boxed{converted} in the form of \boxed{carbon dioxide}.
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the decomposition of plants plays an important role in the carbon cycle…
- The formation of coal takes hundreds of thousands of years. - Carbon can be stored deep underground as coal. - Coal contains the carbon that was once part of ancient plants.
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classify the following chemical reactions as exothermic or endothermic.…
- "two liquids react and their temperature increases" → exothermic - "two liquids react and their temperature decreases" → endothermic - "wood burning" → exothermic - "TNT explosi…
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chemical reactions jigsaw your group will complete one of the chemical …
1. \( 6\text{K} + \text{N}_2 ightarrow 2\text{K}_3\text{N} \) 2. \( \text{C}_3\text{H}_8 + 5\text{O}_2 ightarrow 3\text{CO}_2 + 4\text{H}_2\text{O} \) (corrected formula for propa…
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which statement correctly describes a reaction in dynamic equilibrium? …
At dynamic equilibrium, the reactions continue but the amounts of reactants and products do not change.
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consider the equilibrium system below. nh₄cl(s)⟷nh₄cl(g) if the system …
The rate of sublimation of the NH₄Cl crystals is equal to the rate of solidification of the NH₄Cl vapors.
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which is the correct dot diagram for the element carbon? option 1: c fo…
Option 1
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carbon has _________ valence electrons. options: 0, 4, 1, 6 (with a per…
4 (corresponding to the option with 4, likely the second option: "4")
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consider the following chemical reaction: 2ch₄(g) ⇌ c₂h₂(g) + 3h₂(g) de…
The equilibrium in the system is a dynamic equilibrium. At equilibrium, the rate of the forward reaction ($CH_4$ decomposing into $C_2H_2$ and $H_2$) is equal to the rate of the r…
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the ground state electron configuration for nickel is 1s² 2s² 2p⁶ 3s² 3…
last choice (bottom): \(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^8\)
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why are triglycerides not very soluble in water? they have long hydroca…
A. They have long hydrocarbon chains without partial charges
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the octet rule states that __________ were a full octet! all electron o…
D. atoms tend to gain, lose or share electrons in order to acquire a full set of 8 valence electrons.
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how many orbitals does an s sublevel have? 3d 4s 3p 3s 2p 2s 1s ○ 5 ○ 3…
1 (la opción con el círculo marcado en 1, es decir, la última opción: \( \boldsymbol{1} \))
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what can a person do to limit exposure to x-rays? ○ wear sunblock ○ avo…
C. wear a protective lead vest
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consider the following chemical reaction: 2ch₄(g) ⇌ c₂h₂(g) + 3h₂(g) de…
At equilibrium, concentrations of \(CH_4\), \(C_2H_2\), and \(H_2\) remain constant. Forward (\(2CH_4 ightarrow C_2H_2 + 3H_2\)) and reverse (\(C_2H_2 + 3H_2 ightarrow 2CH_4\)) re…
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which rule is being violated below? x 1s 2s 2p ✓ 1s 2s 2p aufbau’s paul…
Pauli's
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which is the correct electron configuration for sulfur (s)? what is the…
Third one (\(1s^2 2s^2 2p^6 3s^2 3p^4\))
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consider the following equilibrium: co(g) + 2h₂(g) ⇌ ch₃oh(g) k_eq = 26…
The equilibrium concentration of \( \text{CH}_3\text{OH} \) is approximately \( 4.1\ \text{M} \) (or more precisely \( 4.09\ \text{M} \) depending on rounding steps).
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identify the element 1s²2s²2p⁶3s²3p⁶ options: neon, argon, krypton, xen…
B. Argon
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describes the arrangement of electrons around the nucleus of the atom c…
A. Electron configuration
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the highest energy level, outermost s and p orbital electrons in an ato…
B. valence electrons
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which orbital diagram is done correctly? a. 1s: ↑ 2s: ↑ 2p: ↑ ↑ ↑ b. 1s…
b. 1s: ↓↑, 2s: ↓↑, 2p: ↑ ↑ (espacios en blanco)
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the following is the electron configuration for sub - shell (azimuthal …
C. Sodium
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what is an electron dot diagram? image of atomic structure and cl elect…
C. A diagram of the valence electrons in an atom.
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campfire story: wood is burned in a campfire, which cooks food and warm…
### Campfire Story: - Input Energy: Chemical Potential Energy (in wood). - Output Energies: Thermal Energy (heat), Light Energy (light). - Diagram: Chemical Potential (Wood) → The…
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choose the correct noble gas/abbreviated/shorthand/condensed notation f…
fourth choice (bottom)
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what does the \1\ stand for in this electron configuration? 1s² - energ…
C. principle energy level (principle quantum number)
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question 2. what is the correct formula for the ionic compound formed b…
$\boldsymbol{\text{Cr}_2\text{S}_3}$ (corresponding to the option $\text{Cr}_2\text{S}_3$)
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directions: drag a term into each box. each term may be used more than …
The components for Trial 1 are (from left to right box): 1 (Beaker Number), 100 (Amount of Water), 5 (Temperature of Water), 185 (Amount of Sugar Dissolved) (or if Temperature of …
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question 3. drag and drop the correct formula for the ionic compounds f…
a) \( \boldsymbol{\text{Cu}_2\text{S}} \) b) \( \boldsymbol{\text{Fe}_3\text{N}_2} \) c) \( \boldsymbol{\text{ZnF}_2} \) d) \( \boldsymbol{\text{Al}_2\text{S}_3} \)
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question 2. what is the correct formula for the ionic compound formed b…
$\text{Cr}_2\text{S}_3$ (corresponding to the option $\boldsymbol{\text{Cr}_2\text{S}_3}$)
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question 1. what is the correct formula for the ionic compound formed b…
A. $\text{CuO}$ (assuming the first option is labeled A, as the options are $\text{CuO}$, $\text{CuO}_2$, $\text{Cu}_2\text{O}$, $\text{Cu}_2\text{O}_2$)
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bohr model with ape-man practice for each element below you will constr…
### For \( \boldsymbol{^9\text{Be}} \): \( A = \boldsymbol{9} \), \( M = \boldsymbol{9} \), \( P = \boldsymbol{4} \), \( E = \boldsymbol{4} \), \( N = \boldsymbol{5} \) (and \( P …
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(i) a certain pure compound containing element e is analyzed. the eleme…
The empirical formula of the compound is \( \boldsymbol{\text{E}_2\text{SO}_3} \) (or depending on the actual element E, but the ratio gives E₂SO₃).
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in what way are the lines of \the weary blues\ similar to the lyrics of…
A. The poem uses repetition to create meaning.
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name abianna lee chemistry i worksheet classification of matter and cha…
1. H 2. O 3. O 4. H 5. O 6. H 7. H 8. O 9. O 10. O 11. E 12. C 13. M 14. C 15. M 16. M 17. C 18. E 19. C 20. M 21. P 22. P 23. C 24. C 25. P 26. C 27. P 28. P 29. P 30. P 31. P 32…
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• ex: potassium nitride 1) skip 2) 3) 5. magnesium oxide 6. aluminum ch…
5. sulfur dioxide 6. PCl₅ 7. carbon monoxide 8. CCl₄ 9. bromine pentafluoride
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Question was provided via image upload.
1. Sodium bromide 2. Calcium oxide 3. Lithium sulfide 4. Magnesium bromide
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amelie wants to make her home as safe as possible for her family. which…
C. Test to see whether a carbon monoxide detector works.
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all of the following are important integrated pest management (ipm) str…
C. never sterilizing tools
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what is a chemical property? give 3 examples. what are the types of che…
### What is a Chemical Property? A characteristic of a substance observed during chemical change (reaction), describing its ability to form new substances. ### Give 3 examples of …
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5. look at the nutrition facts label from the cereal you used. (if you …
The relative amounts of fat, carbohydrate, and protein molecules in cereal are much larger (per serving) than the amount of individual elements (like sodium, potassium) in cereal,…
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during a lab experiment, students were asked to dilute some hydrochlori…
D. Pour acid slowly against a glass stirring rod into the water beaker
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a carbon isotope consists of 6 protons, 6 electrons and 8 neutrons. wha…
14
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38. which scientist predicted element for places that were not yet occu…
Dmitri Mendeleev ### Question 39
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24. how many electrons are there in the ion $^{40}_{20}\text{ca}^{2+}$?…
18 ### Question 25:
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12. the amount of mass per unit volume refers to the 13. state he si un…
### Question 12: The amount of mass per unit volume refers to the **density**. ### Question 13: a) energy: $\boldsymbol{\text{Joule (J)}}$ b) mass: $\boldsymbol{\text{Kilogram (kg…
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9. a) which state of matter has a definite shape and a definite volume?…
9a) Solid 9b) Liquid 10a) Exothermic 10b) Endothermic 11a) Physical property 11b) Physical property 11c) Chemical property 11d) Physical property 11e) Chemical property 11f) Physi…
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23. the following graph shows how the concentration (amount per unit vo…
B. The amount of reactant first decreases and then stays constant. ### Question 24
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passage 1 passage 2 which of the following expresses a similarity betwe…
The option "Both passages stress the importance of individual contemplation." (assuming the fourth option's text is this; if the fourth option is labeled, e.g., D, then D. Both pa…
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17. which atomic particle is directly involved in chemical reactions? a…
C. Electron ### Question 18
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11. an temperature rises, solids generally become more soluble in water…
A. a only ### Question 12
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final examination time allowed – 1 hour & 30 minutes 200 marks physical…
B. a mixture ### Question 2
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this is a multi - part item. a chemist has 200 ml of a 10% sucrose solu…
s: - Total mass of sucrose: \( 20 + 0.4x \) - Total volume of mixture: \( 200 + x \)
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which of these molecules contain carbon? select all that apply. ozone (…
methane (\(CH_4\)), glucose (\(C_6H_{12}O_6\))
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fill in the color column while your bunsen burner is on. when your burn…
- Potassium ($K^+$): $\approx 3.11\times10^{-19}\ \text{J}$ - Lithium ($Li^+$): $\approx 2.97\times10^{-19}\ \text{J}$ - Calcium ($Ca^{2+}$): $\approx 3.06\times10^{-19}\ \text{J}…
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fill in the color column while your bunsen burner is on. when your burn…
For example, for Sodium (\( \text{Na}^+ \)): Energy calculation: \( E = \frac{hc}{\lambda} = \frac{(6.626 \times 10^{-34} \, \text{J·s})(3.0 \times 10^{8} \, \text{m/s})}{630 \tim…
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1. what is a variable in an experiment? a something that might change b…
A. Something that might change A. Solid, C. Liquid, D. Gas B. By combining 2 or more substances. A. Solute
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when your burner is off, complete the rest of the table. metallic ion |…
For \( \text{Na}^+ \), the energy is approximately \( 3.16\times10^{-19}\, \text{J} \) (values may vary slightly with more precise calculations).
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section i multiple choice 1. why do atoms form bonds? (a) to become neu…
B. To fill their outer valence shell ### Question 2: Which type of bond is formed from atoms sharing electrons between them?
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analyzing consequences of nicotine on pregnancy electronic cigarettes (…
D. Neither e - cigarettes nor traditional cigarettes should be used during pregnancy.
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5. compare the general physical and chemical properties of metals, nonm…
- **Physical Properties**: - Metals: Lustrous, good conductors, malleable, ductile, high m.p./b.p. (mostly solids). - Nonmetals: Dull, poor conductors, brittle, low m.p./b.p. (gas…
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1) what is the analogy (comparison) that was used to describe the \clou…
B. Like the droplets from hairspray ### Question 2
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the energy at point a is potential energy kinetic energy chemical energ…
The correct energy at point A is Potential energy (the checked option: "Potential energy").
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which of these is the correct lewis structure for ethyne (acetylene), c…
The correct option is the fourth one: \( \boldsymbol{\ce{H - C\equiv C - H}} \) (the last option with the triple bond between the two carbon atoms).
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which of these is the correct lewis structure for hydrogen cyanide, hcn…
The fourth option: H—C≡N: (the last option with the triple bond between C and N and a lone pair on N)
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which statements describe haiku? check all that apply □ a haiku is a po…
A. A haiku is a poem that consists of three lines, C. A haiku often contains a kigo, D. A haiku contains ideas that are written in present tense
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which of these is the correct lewis structure for nitrogen tri-iodide, …
The bottom - most Lewis structure (the fourth option, with N in the center, bonded to three I atoms each having three lone pairs of electrons and N having one lone pair of electro…