化学
化学反应、化学计量、分子结构与元素性质。
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the zinc appeared to break down, and a new substance, a gas, appeared t…
Cavendish used the name "inflammable air" for hydrogen gas because hydrogen is combustible and can burn.
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draw the orbital diagram for a neutral potassium atom. write the electr…
Electron configuration: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}$ Orbital diagram: 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑↓ ↑↓, 4s: ↑ Number of unpaired electrons: 1
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draw the orbital diagram for a neutral potassium atom. write the electr…
Orbital diagram: 1s: two paired electrons (using the "paired" symbol), 2s: two paired electrons, 2p: three sets of two paired electrons, 3s: two paired electrons, 3p: three sets o…
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which rule was broken? aufbau principle hunds rule pauli exclusion prin…
AUFBAU PRINCIPLE
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which rule was broken? aufbau principle hunds rule pauli exclusion prin…
Hund's Rule
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which rule was broken? aufb au principle hunds rule pauli exclusion pri…
AUFBAU PRINCIPLE
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match the rule... \in the ground state of an atom, electrons fill lower…
1. "In the ground state of an atom, electrons fill lower energy orbitals first before occupying higher levels." - AUFBau PRINCIPLE 2. "Electron pairing only occurs after all orbit…
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64. draw the bohr model for sodium (na) and then draw the lewis structu…
- For sodium (Na): - Bohr model: Draw a nucleus labeled 'Na' with 11 protons and 12 neutrons, 3 concentric circles with 2, 8, 1 electrons respectively. - Lewis structure: 'Na' wit…
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you will write an explanation of a process using precise language and v…
To understand the nature of gases and chemical substances, identify new elements and study their properties.
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write the symbol of each neutral element based on its noble gas shortha…
1. Li 2. Zr 3. Hg
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write the symbol of each neutral element based on its noble gas shortha…
1. Co 2. C 3. Ba
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which elements do the following electron configurations represent: 66. …
66. Ar 67. Br 68. Sn 69. P 70. Cd 71. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}$ 72. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}$ 73. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3}$ 74.…
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64. draw the bohr model for sodium (na) and then draw the lewis structu…
**Bohr model of sodium**: Draw a small circle to represent the nucleus with "Na" inside. Around the nucleus, draw 3 concentric circles for electron - shells. Put 2 dots on the inn…
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write the symbol of each neutral element based on its written electron …
1. V 2. Cu 3. Xe
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65. draw the bohr model for chlorine (cl) and then draw the lewis struc…
For chlorine: Bohr - model: Nucleus with 'Cl' and three electron - shells with 2, 8, 7 electrons respectively. Lewis - structure: 'Cl' with 7 surrounding dots.
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1. sort the cards under their proper heading, using the following descr…
- A: Element - A pure substance made of one kind of atom. Example: Oxygen. - B: Compound - A substance with different atoms chemically bonded. Example: Water. - C: Mixture of Elem…
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write the symbol of each neutral element based on its written electron …
Y O La
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type your response in the box. a reddish layer of rust can form on old …
Reactants: Iron, Oxygen; Product: Iron oxide. Equation: Iron + Oxygen → Iron oxide.
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fill in the blanks 53. what is the charge of a proton? 54. what is the …
53. +1 54. - 1 55. 0 56. Atom 57. Valence 58. 6 59. 2 60. 8 61. True 62. False 63. True 64. (Describe drawing process as above) 65. (Describe drawing process as above)
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a) atomic mass c) number of neutrons b) atomic number d) volume 48. ___…
48. D) all of the above 49. B) number of protons 50. A) it gives off energy 51. B) Atoms of isotopes of an element have different numbers of protons. 52. C) 2d
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organize the sublevels from lowest to highest energy. (fills first) (fi…
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d
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41. ____ ti(so4)2 42. ____ 2ce2(so4)3 multiple choice 43. ____ the numb…
43. B. mass number 44. C. ion 45. D. the ground state 46. A. the greater the energy the farther the electron is from the nucleus 47. (No options provided for 47, but the key conce…
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5. once you are done, fill in the table below with scientifically accur…
| Type | Actual Definition | Examples | |--|--|--| | A: Element | A pure substance made of one type of atom that cannot be broken down into simpler substances. | Hydrogen (H), Oxy…
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how many electrons occupy... a filled 3rd energy level a filled 7s subl…
18 2 14 5
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how many electrons can occupy... a filled 3p sublevel a filled 2nd ener…
a filled 3p sublevel: 6 a filled 2nd energy level: 8 any orbital: 2 a filled 4d sublevel: 10
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one way in which elements differ from each other is the structure of th…
C. a higher energy than an electron near the nucleus
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what must happen to an atom of magnesium in order to become a magnesium…
It must lose two electrons and become an ion.
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which sentence describes inca textiles? inca rulers were the only ones …
Colors and patterns on them identified where people lived.
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pregunta 1 de 25 ¿cuál de las siguientes sería una buena situación en l…
B. Cuando el $\Delta H$ de la reacción no se conoce
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which best describes the potassium ion that forms? it is a negative ion…
It is a positive ion that has one less valence electron than a neutral potassium atom.
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pregunta 1 de 25 ¿qué reacción provocaría un aumento de la entropía? a.…
# Explicación: ## Paso 1: Comprender el concepto de entropía La entropía es una medida de la desorden en un sistema. En reacciones químicas, el aumento de la entropía ocurre cuand…
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pregunta 1 de 25 ¿qué se puede decir de la reacción 2nh₃ (g)→n2 (g)+3h2…
D. La reacción es endotérmica.
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which are different forms of an element that have different numbers of …
B. isotopes
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¿qué describe mejor la entalpía de formación de una sustancia? a. el ca…
A. El cambio de energía que ocurre cuando una sustancia se forma a partir de sus elementos.
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atoms decay into smaller atoms particles. each alpha particle has, and …
helium-4
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¿cómo se utiliza la estequiometría para calcular la energía absorbida c…
# Explicación: ## Paso 1: Convertir masa a moles Para calcular la energía absorbida durante la fusión, primero se debe convertir la masa en gramos de sólido a moles. Esto se hace …
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pregunta 1 de 25 ¿cuánta energía se necesita para hervir 100 ml de agua…
DO. $100\ ml\times\frac{1\ g}{1\ mL}\times\frac{1\ mol}{18.02\ g}\times40.65\ kJ/mol = 226\ kJ$
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if we have a sample of silicon (si) atoms that has 14 protons, 14 elect…
silicon - 32
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¿qué afirmación describe el diagrama de energía potencial de una reacci…
A. La energía potencial de los reactivos es mayor que la energía potencial de los productos.
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what could be done to change this carbide ion to a neutral carbon atom?…
remove 4 electrons
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pregunta 1 de 25 ¿qué podría causar que la entropía aumente en una reac…
DO. Los productos cada vez están más extendidos
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atomic structure test matching: what is each scientist known for? 1. c …
| Element Symbol | Atomic Number | Mass Number | Number of Protons | Number of Neutrons | Number of Electrons | | ---- | ---- | ---- | ---- | ---- | ---- | | Ar | 18 | 40 | 18 | 2…
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¿qué se puede decir de una reacción con δh = 62,4 kj/mol y δs = 0,145 k…
A. Es espontáneo a 500 K.
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¿a qué temperatura se produciría una reacción con $delta h = - 220$ kj/…
# Explicación: ## Paso 1: Escribir la ecuación de Gibbs Para una reacción espontánea, $\Delta G<0$. La ecuación de Gibbs es $\Delta G = \Delta H - T\Delta S$. Igualamos $\Delta G …
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¿a qué temperatura se produciría una reacción con δh = -220 kj/mol y δs…
No hay una opción correcta entre las ofrecidas, pero siguiendo el cálculo $T=\frac{\Delta H}{\Delta S}$, con $\Delta H=-220\ kJ/mol$ y $\Delta S = - 0.05\ kJ/(mol\cdot K)$ el resu…
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atomic structure test matching: what is each scientist known for? 1. __…
1. C 2. D 3. A 4. E 5. B | Element Symbol | Atomic Number | Mass Number | Number of Protons | Number of Neutrons | Number of Electrons | | ---- | ---- | ---- | ---- | ---- | ---- …
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¿cómo se relaciona la entropía con la espontaneidad de una reacción? a.…
B. $\Delta S> 0$ contribuye a la espontaneidad.
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¿qué significa un negativo? ¿h dime alguna reacción? a. la reacción no …
# Breve explicación: En una reacción química, un valor negativo de la entalpía ($\Delta H$) significa que la reacción libera calor al entorno. Estas reacciones se denominan exotér…
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¿qué información proporciona la energía libre de gibbs sobre una reacci…
A. Indica si la reacción se producirá de forma espontánea o no.
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ecodetectives: peril river restoration: based on the data you have coll…
It could be The Factory, Big Sky Ranch, Paradise Organic Farm, The Power Plant (depending on the data)
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ii. bohr model practice d. fill in the chart for the bohr model and ele…
| Element | Atomic # | Bohr Model (simplified description) | # of valence Electrons | | ---- | ---- | ---- | ---- | | Mg | 12 | 2 - 8 - 2 (2 electrons in the first shell, 8 in the…
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3 tries left what most caused the decreased use of chemical photographi…
C. the emergence of new digital technology
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8. how can scientists predict how an element will react? 9. why was men…
8. By examining its position in the periodic table and electron - related properties. 9. For predicting undiscovered elements and their properties. 10. New elements fit into the p…
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b. for the following electron configurations determine the possib 6. 1s…
6. Selenium 7. Krypton 8. Ytterbium 9. Vanadium 10. Antimony 11. Potassium 12. Erbium 13. Aluminum
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10. match each word with its definition. 1. tangible 2. unanimous 3. ta…
1. tangible - d. easy to observe clearly, real 2. unanimous - l. when everyone involved agrees 3. tactics - j. parts of a strategy or plan of action 4. synthetic - a. made by comb…
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question 9 (5 points) which phrase does not describe a mineral? a) natu…
D. Organic solid
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directions: in a group of 3 - 4 people, complete one section of the pra…
1. $1s^{2}2s^{2}2p^{6}3s^{1}$ 2. $[Xe]4f^{14}5d^{10}6s^{2}6p^{2}$ 3. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}$ 4. $[Rn]5f^{3}6d^{1}7s^{2}$ 5. $1s^{2}2s^{2}2p^{3}$ …
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whats a pluton? a) a body of igneous rock that forms from cooling lava …
1. B. A body of igneous rock that forms within Earth's crust 2. 6
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8. how will you prepare a 5mm solution of silver nitrate in 100 ml usin…
Take 5 mL of the 0.1 M stock solution and dilute it to 100 mL with the appropriate solvent.
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7. calculate the volume in ml of a 20.5 mg/ml kanamycin needed to make …
$0.6$
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name: _ teacher: _ date: _ unnamed schools q1 chemistry 1/14 electron c…
1. Group 5A/15 2. Alkali Metals 3. Noble Gases 4. Group 3A/13 5. Group 6A/16
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in 3 - 5 sentences, explain the atomic theory. elaborate and provide ex…
Atomic theory posits matter is composed of atoms. Atoms have a nucleus with protons and neutrons, and electrons around it. A hydrogen atom is a simple example with one proton and …
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question 1 a nucleus with an atomic number of 4 and a mass number of 9 …
C. 5 neutrons
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2. draw out the lewis dot structure for sodium bicarbonate (hint: think…
For sodium bicarbonate ($NaHCO_3$), draw a $HCO_3^-$ structure with carbon as the central atom, double - bonded to one oxygen, single - bonded to another oxygen and a hydrogen, wi…
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which is larger: a sodium atom or an argon atom? a. a sodium atom b. an…
1. Question 7: A. A sodium atom 2. Question 9: B. A sulfur atom 3. Question 10: C. Negative ion
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which of the following is a correct statement about atoms? a. atoms are…
Question 11: A. Atoms are ancient and mostly empty space. Question 12: B. Lanthanides Question 13: D. Bohr
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20. why are filters so important in a tank? removes harmful chemicals r…
All are correct
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6. atoms with the same number of protons but different number of neutro…
Isotopes
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what is the atomic mass of the element within group 17, period 2? 6.941…
18.998 amu
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suppose you have a sample of potassium. describe several ways you could…
Potassium is highly reactive due to its single valence electron.
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which element would you expect to have the highest electronegativity? a…
An element with a small atomic radius
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what is the primary use of most of the newest elements on the periodic …
B. Research labs
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5. where is the majority of carbon found on earth? atmosphere live plan…
Bottom of the Ocean
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9. we need a or final answer to this question. a. definitive b. suscept…
9. A. definitive 10. B. infinitesimal 11. B. finite 12. C. retraction 13. D. intractable 14. B. detract 15. B. protracted
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how do radiopharmaceuticals help in diagnosing medical conditions? by r…
By emitting radiation that can be detected
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which term is defined as the energy required to remove an electron from…
ionization energy
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describe generally how the trends in ionization energy and atomic radiu…
Noble gases have high ionization energy and small atomic radius due to full outer shells.
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why do the newest elements on the periodic table require advanced techn…
They have high atomic numbers.
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in which group would you find elements with the highest electronegativi…
A. Group 17
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true or false, in a mixture, the components retain their own chemical p…
True
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what atom matches this electron configuration? 1s22s22p63s2 neon potass…
Magnesium
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which of the following is the correct electron configuration for a carb…
1s²2s²2p²
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choose the correct configuration for neon (ne). 7/10 1s2 2s2 2p6 3s2 3p…
1s²2s²2p⁶
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a small amount of sodium hydroxide is added to water. when the chemical…
The negative log of the concentration of H+ ions is 12. Sodium hydroxide is a strong base.
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what is the noble gas configuration for phosphorus? ne 3s2 3p3 na 3s2 3…
[Ne]3s²3p³
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which has more hydrogen ions - a solution with a ph of 3 or a ph of 12?…
pH of 3
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what is the noble gas configuration for beryllium? 5/10 li2s1 he2s2 li2…
[He]2s²
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19. choose all that apply. choose two things that scientists include in…
19. the number of atoms in a substance, chemical symbols 20. The solution can hold more dissolved solute than it normally can, Supersaturation only occurs under specific conditions
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which electron configuration belongs to chlorine (cl)? 1s2 2s2 2p6 3s2 …
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}$
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psychology / module 3 development over the life span 13. mental network…
Gender - schema
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17. choose the best answer. what elements are in c3h8 (propane)? hydrog…
17. hydrogen and carbon 18. 9
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which statement best describes what it means when something is classifi…
It easily dissociates into ions in solution.
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what is the noble gas configuration for boron? li2s22p1 he1s22s2 he2s22…
[He]2s²2p¹
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which substance is most likely to dissolve in greater quantities in col…
oxygen - gas
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which of the following elements is a noble gas? 1s² 2s² 2p⁶ 3s² 3p⁶, 1s…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$
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what is the noble gas shorthand electron for sulfur atom? na 3s23p4 ne …
[Ne] 3s²3p⁴
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when salt dissolves completely into water, which term is used to descri…
D. solvent
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16. match the descriptions with the terms. these are the smallest parts…
1. Molecules 2. Dissolving 3. Concentration 4. Protons 5. Sublimation 6. Dilution or concentration adjustment
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the relationships among which variable quantities are expressed by the …
pressure, volume, temperature, number of moles
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increasing the ____ makes it easier for dissolution to occur. reactive …
D. surface area of a solute