Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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____ helps dissolution by dispersing and evenly spreading a solute with…
D. Agitation
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the chart describes characteristics of * particles are small enough tha…
C. aqueous solutions
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combining substances physically results in a ____. mixture molecule sol…
A. mixture
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the same quantity of each solute is added to water. which solution will…
strong acid
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which element group conducts heat and electricity and can be stretched …
D. metals
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which answer completes the chart? 26 fe iron 6.941 chemical symbol elem…
atomic number
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a substance has a ph of 6.0. how would it be classified? (1 point) stro…
weak acid
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5. choose the best answer. the element ____ is found in organic compoun…
5. C. carbon 6. D. a bond
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3. choose the best answer. found in air and water, ____ is the earth’s …
3. D. oxygen 4. A. both metals and nonmetals
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a(n) ____ is created when elements are combined chemically, and it can …
A. compound
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in a solution, which pair of actions could combine to keep a concentrat…
adding solute, then removing solution
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1. look at the table. then, choose the best answer. chemical compounds …
sand
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carbonated beverages contain dissolved carbon dioxide gas. which temper…
Low temperatures are best to maximize the solubility.
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which term refers to the substance that is dissolved into another subst…
C. solute
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there are 500 molecules in an airtight bucket, and the volume is held c…
adding 100 more molecules and increasing the temperature by 10K
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elements with their electronegativity element electronegativity bromine…
bromine and nitrogen
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which phrase best describes electronegativity? (1 point) ○ the partial …
the relative strength with which an element attracts electrons in a chemical bond
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the boiling point of methanol is 64.7°c. its melting point is -97.6°c. …
liquid
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based on their locations in the periodic table, which two elements are …
Nitrogen (N) and oxygen (O)
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covalent and ionic bonding quick check which statement about sodium chl…
The sodium atom transfers electrons to the chlorine atoms to form ionic bonds.
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which element would most likely lose electrons to form positive ions wh…
rubidium (Rb)
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science kids: the periodic table of elements madelyn roque 3. about how…
C. 40
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science kids: the periodic table of elements madelyn roque 2. the colum…
B. families
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which element has similar chemical properties as sodium but has 7 energ…
Francium (Fr)
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which of the following equations demonstrates the law of conservation o…
$CH_4+O_2 ightarrow C + 2H_2O$
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2 grams of potassium (k) reacts with 5 grams of oxygen (o). according t…
7 grams
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78 g of potassium (k) react with 71 g of chlorine (cl) to produce potas…
149 g
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conservation quick check if the mass of elements before a chemical reac…
30 grams
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what does the law of conservation of mass state? (1 point) matter canno…
D. The total mass of all of the reactants prior to a chemical reaction must equal the total mass of all the products after the reaction.
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astatine (at), iodine (i), chlorine (cl), bromine (br). which of the fo…
Chlorine (Cl)
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which is true regarding the element in period 2, group 8? small atomic …
high ionization energy, low electronegativity, small atomic radius
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which of the following will have a lower ionization energy than scandiu…
Calcium (Ca)
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which of the following will have a higher electronegativity than arseni…
Carbon (C)
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explain what happens with the water molecules when you heat up a pot of…
When a pot of water is heated, the water molecules absorb heat energy, increasing their kinetic energy. They move faster. The water stays as a liquid until it reaches the boiling …
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which of the following elements has the smallest atomic radius? argon (…
Helium (He)
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name: using science skills id: a element symbol protons neutrons electr…
32. 12 33. 8 34. 13 35. Helium 36. None in the table 37. Drawing an atom of nitrogen: Nitrogen has atomic number 7 (7 protons, 7 electrons), and common isotope has 7 neutrons. Dra…
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neon (ne) carbon (c) antimony (sb) germanium (ge) which of the followin…
Carbon (C)
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of the halogens, which has the smallest radius? 4/10
F
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which of the following has the greatest electronegativity? o n cs he
O
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the atom with the largest atomic radius in group 18 is -
Rn
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when the measured temperature goes up, the system releases energy. how …
exothermic
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1. an atom has how many basic parts? a. two b. three c. four d. five an…
B. three
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the temperature measured around the reaction increases during an experi…
The energy of the system decreases (releases energy).
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science kids: the periodic table of elements madelyn roque 3. in what y…
A. 1869
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when the measured temperature goes down, the system absorbs energy. how…
Endothermic
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16) a chemist wishes to calibrate a bomb calorimeter, so she combusts 7…
D. $14.18\ kJ\ ^{\circ}C^{-1}$
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in the equation 2h₂ + 1o₂ →→ 2h₂o if you change the 2h₂ to 3h₂ molecule…
The equation will produce three molecules of water.
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which statement correctly explains why the ashes of burnt paper have le…
Some of the atoms in the paper became gases.
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one molecule of calcium oxide, cao, and one molecule of carbon dioxide,…
$CaCO_3$
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when iron rusts and forms iron oxide, the iron oxide has more mass than…
Iron oxide has oxygen atoms, and pure iron does not.
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13. which is not a unit of measurement in the metric system? a. meter b…
13. b. inch 14. d. gram 15. d. protons, neutrons, and electrons 16. b. electrons 17. c. protons and neutrons 18. b. 11 19. d. two atoms of hydrogen and one atom of oxygen 20. b. s…
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13. which is not a unit of measurement in the metric system? a. meter c…
15. d. protons, neutrons, and electrons 16. b. electrons 17. c. protons and neutrons 18. b. 11 19. d. two atoms of hydrogen and one atom of oxygen 20. b. sharing an electron pair …
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1. what do we call a solid, liquid or gas that cant be broken into anyt…
An Element
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5. sep analyze data find the second column, or group 2, of the periodic…
5. Elements in Group 2 are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), radium (Ra). They all have an $ns^{2}$ electron - configuration, with 2 valen…
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these noble gas electron configurations can be used as a \short cut\. h…
1. [Ne]3s¹ 2. [Ne]3s²3p³ 3. [Ar]3d⁶4s² 4. [Kr]5s² 5. [Ar]3d¹⁰4s²4p⁵ 6. [He]2s²2p⁴ 7. [Ar] 8. [Ne]3s²3p¹ 9. [Rn]7s¹ 10. [Kr]4d¹⁰5s²5p⁴ Electron configuration of Uranium: 1s²2s²2p⁶3…
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1. ccc patterns what patterns do you observe in the electron configurat…
1. Patterns include sequential filling of energy levels and orbitals following specific rules. 2. Completed table using electron - filling rules. 3. Rules are Aufbau principle, Pa…
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the soil in forested wetlands has dark soil, which indicates a high lev…
organic matter
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what does it mean when a reaction is described as \exothermic\? the rea…
The reaction releases energy to the surroundings in the form of heat.
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what does it mean when a reaction is described as \endothermic\? the re…
The reaction absorbs energy from the surroundings as heat.
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analyzing data patterns in electron configurations as described by the …
| Atomic number | Element | 1s | 2s | $2p_{x}$ | $2p_{y}$ | $2p_{z}$ | 3s | Electron configuration | |---|---|---|---|---|---|---|---|---| | 1 | H | $\uparrow$ | | | | | | $1s^{1}…
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you do: 1) consider the image provided what state of matter is represen…
1. c) Gas; d) Condensation 2. b) Melting
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question 16 (multiple choice worth 5 points) (82 0611 mc) which of the …
D. Na has a larger radius than Na⁺, because Na⁺ has lost its outermost energy shell.
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question 10 multiple choice worth 5 points (02 02r lc) is a nonmetal in…
C. Sulfur
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the table shows the charge on three unknown subatomic particles. charge…
B. Only particle Z
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13) a 500.0 ml acid solution is 0.100 mol l⁻¹ in hcl and 0.400 mol l⁻¹ …
C. 1.67 L
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sulfur (s) has an atomic number of 16. what is the ground - state elect…
1s²2s²2p⁶3s²3p⁴
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which locations are likely to have subatomic particles with the least m…
1 and 4
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which of the following groups of elements are likely to have substances…
D. Group 14
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what is the general trend for electron affinity values going across a p…
The values become more negative.
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excerpt from society and solitude by ralph waldo emerson the necessity …
Every individual has private motivations.
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a neutral oxygen atom has ______ electrons. 7 8 9 10
B. 8
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12) calculate the $delta_fh^{circ}$ for $so_3(g)$, given the following …
B. $-396\ kJ\ mol^{-1}$
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match the vocabulary word to its definition: 1. subatomic particles 2. …
For the isotope table: see above - filled table. For question 7: The atom is carbon. Explanation: The number of protons in the nucleus is 6, and the atomic number of carbon is 6, …
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6. what is meant by half - life? give an example of how half - life is …
6. The half - life is the time required for half of the atoms of a radioactive substance to decay. Example: Carbon - dating uses the 5730 - year half - life of carbon - 14 to dete…
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complete the following as best as you can based on your prior knowledge…
1. - Liquid to Gas: - Name: Vaporization - Energy is: Absorbed - Example: Water boiling to steam - Liquid to Solid: - Name: Freezing - Energy is: Released - Example: Water turning…
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match the terms review. 1. cohesion a. tendency to stick to other subst…
1. e. tendency to stick to other water molecules 2. g. tendency to climb up due to cohesion and adhesion properties of water 3. a. tendency to stick to other substances 4. f. unev…
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1 what is chemistry? (continued) 7. identify three models that scientis…
- Physical models: Visualize structure. - Mathematical models: Predict behavior. - Conceptual models: Explain phenomena. ### 8.
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1 which property shows an increasing trend in the elements, from group …
1. A. ability to form anions 2. D. The attraction between the positive ions and the 'sea of electrons' is stronger in lithium than in sodium. 3. A. 1, 2 and 3 4. D. Y and Z
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recall from yesterday that there are 4 subblocks (s, p, d, and f) that …
2. 1s²2s²2p⁴ 3. 1s²2s²2p⁶3s² 4. 1s²2s²2p⁶3s²3p⁵ 5. 1s²2s²2p⁶3s²3p⁶4s² 6. 1s²2s²2p⁶3s²3p⁶4s²3d⁶
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on virtue mending wall by robert frost something there is that doesnt l…
# Breve explicación: "On Virtue" de Wheatley utiliza un lenguaje más formal y poético con metáforas como "O thou bright jewel in my aim I strive", mientras que "Mending Wall" de F…
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on virtue by phillis wheatley o thou bright jewel in my aim i strive to…
"On Virtue" uses metaphor, while "Mending Wall" does not.
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3. explain the difference between the mass of a proton and the mass of …
The nucleus contains protons and neutrons which are much more massive than electrons, so it is responsible for nearly all of the atom's mass. A proton is much more massive than an…
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8. the tendency for water molecules to be attracted and stick to other …
8. Adhesion 9. a. It helps some insects "skate" across the surface of the water. b. It refers to the tightness across the surface of the water. d. It causes raindrops to form roun…
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example problem: the following initial rates were measured for the reac…
(a) Rate law: rate = $k[X][Y]$, Overall order = 2 (b) $k = 0.40\ M^{-1}s^{-1}$ (c) $0.036\ M\ s^{-1}$ (d) $0.0625\ s$
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9) brass is an alloy of copper (cu) and zinc (zn). if 8.32 g of copper …
A. $1.10\times 10^{23}$ metal atoms
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3. explain why there are different branches of chemistry 4. explain why…
3. Chemistry is vast and different branches focus on specific aspects for in - depth study. 4. Mass is constant while weight can vary, so mass is preferred for consistent measurem…
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the electronic structures of some atoms and ions are shown. (a) write t…
(a)(i) A, F (ii) B (iii) D (b)(i) $H^-$ (ii) $Al$
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properties of water write the definition of each key term. polarity: co…
- Polarity: Uneven charge distribution in a molecule. - Cohesion: Attraction between like molecules. - Adhesion: Attraction between unlike molecules. - Capillary action: Movement …
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1 what is chemistry? (continued) check your progress 1. explain why the…
1. Chemistry helps understand matter and impacts daily life in multiple areas. 2. A substance is matter with definite composition and properties. Examples: water, sodium chloride.…
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the motion of the particles. 4 8. this question is about zinc and compo…
(a) Good electrical conductivity, High thermal conductivity, Malleability 9. (a) (i) A, H (ii) B (iii) D
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which of the following relates the impact of rachel carsons silent spri…
The question is not clear as the text is blurry and some parts seem to be cut - off. Please provide a clear and complete question.
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(b) group i elements have lower melting - points than transition elemen…
(b) Group I elements are softer. (c) Solid (d)(i) original colour of potassium bromide solution: Colourless; final colour of reaction mixture: Orange - brown 7.(a) A: Freezing; B:…
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which statement is true regarding a chemical reaction? (1 point) the to…
The total number of atoms does not change, so mass is conserved in the reaction.
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in which chemical equation is the number of atoms in the reactants the …
$\text{Zn}+2\text{HCl} ightarrow\text{H}_2+\text{ZnCl}_2$
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conservation in chemical reactions quick check which of the following e…
# Explanation: ## Step1: Recall the Law of Conservation[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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elements j and k are in the same period in the periodic table. j reacts…
D. J is to the left of K in the Periodic Table. ### 6. (a) (i)
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conservation in chemical reactions quick check which of the following e…
None of the above. The balanced equation that demonstrates the Law of Conservation of Mass for the[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][…
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parts of a reaction use the following reaction to answer the question t…
products
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real-world connection analyze the importance of chemistry in our societ…
Chemistry is highly important in society as its branches contribute to materials science, medicine, quality - control, and biotechnology among other areas.
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parts of a reaction what part of a chemical reaction is highlighted in …
states of matter