Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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in march of 2023, the wal - mart distribution center caught fire in pla…
Geosphere: The geosphere was negatively impacted by pollution runoff, because the runoff from firefighting water can contaminate soil and groundwater. Hydrosphere: The hydrosphere…
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question 5 honi incorrectly remembered seeing butter in the fridge. thi…
A. schema
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question 1 1 pts after repeatedly hearing the pizza commercial jingle, …
Question 1: priming Question 2: representativeness heuristic
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12. which value of an element is calculated using both the mass and the…
Atomic mass
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11. complete the following sentence: isotopes of the same element have.…
the same number of protons, but different numbers of neutrons
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a cube with the following properties is observed: a. length: 4 cm b. he…
G, I, J
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6. the bohr model shows that electrons are found in a cloud surrounding…
spinning around the nucleus in specific paths
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4. exothermic reactions - always release energy never have reverse reac…
always release energy
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2. look at each of the following pairs of elements. predict whether eac…
(a) Yes, because Mg is a metal and O is a non - metal. (b) Yes, because Zn is a metal and Cl is a non - metal. (c) No, because both C and F are non - metals. (d) No, because both …
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parts of an isotope and ion use the atomic symbol to fill in the blanks…
See the above - filled table.
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chapter 4.1 - 4.3 vocabulary matching element symbol daltons law compou…
Element symbol: f Dalton's Law: k Compound: c Electrons: h Proton: m Isotope: e Mass Number: b Law of Conservation of mass: No match Atoms: j Chemical Formula: l Nucleus: g Neutro…
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worksheet - isotopes and average atomic masses name: jaliah d period: 6…
1. **Question**: Four isotopes of lead include 204 - lead, 206 - lead, 207 - lead and 208 - lead. The average atomic mass of a lead atom is 207.2 amu. Which isotope of lead is lik…
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the atomic mass for each element is reported on the periodic table. thi…
Argon - 40 is the most abundant isotope in nature because the reported atomic mass of argon (approx. 39.95 amu) is closest to the mass of argon - 40. 2.
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read the selection. jacques offenbach never imagined what would happen …
C. To show that complex lyrics can be memorable
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choose the correct answer. which of these is the atomic mass of cobalt …
58.933
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read pages 138 - 146. then, complete questions 1, 2, 3a, & 3b. 1. choos…
a. In making a case for raising the minimum wage, I am not saying that businesses will go bankrupt. b. But my argument will do more than prove that one particular industrial chemi…
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what number specifies the total number of protons and neutrons combined…
B. atomic mass
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friday 01/19 dual - credit sub plan worksheet: ch 40 met read pages 138…
1. a. In making a case for raising the minimum wage, I am not saying that businesses will go bankrupt overnight. b. But my argument will do more than prove that one particular ind…
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friday 01/19 dual - credit sub plan worksheet: ch 10 metacommentary (8 …
This is a writing - related task focusing on metacommentary in essays.
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which of these is the atomic number of calcium (ca)? 40.078 20 ca
20
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which of the following is a counterexample for this conditional stateme…
Helen, who is good at math and is a hockey coach
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parts of an isotope and ion use the atomic symbol to fill in the blanks…
See the above - filled table.
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balancing chemical equations suggestions: 1. use a pencil, so that you …
\(Ca(NO_3)_2+Cu_2SO_4 ightarrow CaSO_4 + 2CuNO_3\)
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which element has an atomic number of 74? rhenium technetium tungsten
Tungsten
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which element has an atomic number of 42? tungsten rhenium molybdenum
Molybdenum
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which element has 16 protons in its nucleus? selenium arsenic sulfur
Sulfur
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which element has 33 protons in its nucleus? arsenic selenium phosphorus
A. Arsenic
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which element has 20 protons in its nucleus? calcium potassium sodium
Calcium
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which elements would react most easily with each other? (1 point) an el…
1. an element with a high electronegativity and an element with a single valence electron
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which element listed would have the greatest electronegativity? periodi…
Fluorine (F)
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how are reactivity and electronegativity related? (1 point) elements wi…
An element will be more reactive if it has a very high or very low electronegativity.
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which elements on the periodic table are the least reactive? (1 point) …
the group with helium at the top
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which element would have the lowest electronegativity? (1 point) an ele…
an element with a small number of valence electrons and a large atomic radius
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12. when creating a graph, which variable is usually placed on the x - …
12. B. 自變量 13. E. None of the above 14. D. 它們相互滑動但有一定的體積 15. C. 蒸發（或汽化） 16. D. 凝華 17. C. 密度
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use the data table below to answer the following questions: | isotope |…
1. They have the same number of protons. 2. They have different numbers of neutrons and different atomic masses. 3. Average atomic mass is approximately $9.09$ amu, and the elemen…
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question 1 - 3 why does a layer of ice form on the surface of a pond du…
D. Molecules of water in the solid phase are less dense than those in the liquid phase.
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what is the measure of the gravitation force exerted on an object? weig…
Question 1: weight Question 2: protons Question 3: Definite volume, no definite shape, relatively incompressible
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atomic structure worksheet fill in the blanks for the elements in this …
| Element | Number of Protons | Number of Neutrons | Number of Electrons | Atomic Mass | Atomic Number | | ---- | ---- | ---- | ---- | ---- | ---- | | lithium | 3 | 4 | 3 | 7 | 3 …
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question 10 1 pts part 3: use the following phs to answer the questions…
B. detergent
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part 3: use the following phs to answer the question. ph of coffee = 3 …
more
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atoms - extra practice use your new skills to answer the following. wri…
1. Name: Nickel - 60, Isotope symbol: $^{60}_{28}Ni$ 2. Name: Barium - 135, Isotope symbol: $^{135}_{56}Ba$ 3. Name: Germanium - 73, Isotope symbol: $^{73}_{32}Ge$ 4. Name: Gold -…
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true or false: because the amount of solute and the volume of solution …
b. False
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examples of extensive property are _____. select all that apply a color…
B. Volume, D. Mass
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because the more water you boil the more time it will take (other condi…
b. False
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complete the sentence using one of the following words: intensive, exte…
intensive
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which of the following properties are examples of intensive properties?…
A. Temperature, B. Solubility, C. Color
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tap water: homogeneous mixture madison wi, water quality report 2024 wa…
| Substance | Symbol or Formula | Element or compound? | |--|--|--| | Iron | Fe | Element | | Manganese | Mn | Element | | Sodium | Na | Element | | Arsenate | $AsO_{4}^{3 - }$ | …
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what does electrical engineering deal with? devices and systems using e…
A. Devices and systems using electricity
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what field did engineering originally refer to? military engineering ci…
A. Military engineering
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which of the following are true statements about extensive properties? …
A. They include properties like mass and volume. C. They depend on the amount of matter in a sample. E. They change with the amount of matter.
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lack of friction heat exercise chemicals identify common pathology for …
epidermis
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9 what happens on the particle level when a substance melts? a a super …
B. The particles move from very close together to farther apart
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example #1: ionization energy 1. which of the following elements will h…
1. c) Ra 2. b) Cl
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what is the primary factor that determines the state of matter of a sub…
D. Temperature
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which are examples of elements? (select all) oil oxygen water carbon qu…
For the first question: oxygen, carbon For the second question: electron, neutron, proton
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what is one reason why the author includes the information about what e…
# Breve explicación: Al hablar sobre las energías que utiliza un automóvil, el autor probablemente busca explicar cómo la energía hace que el coche se mueva. Las otras opciones so…
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exothermic reactions absorbs energy true false question 27 1 pts respir…
1. False 2. True
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what is the rhyme scheme of \a psalm of life\? abba aabb abbc abab
D. ABAB
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water sticking to itself is called cohesion adhesion solubility surface…
Question 1: A. Cohesion Question 2: A. Adhesion
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which of the following is exothermic? burning wood evaporation melting …
Question 1: burning wood Question 2: evaporation
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an exothermic reaction ______ energy. creates releases absorbs destroys
B. releases
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an exothermic reaction ____ energy. creates releases absorbs destroys
B. releases
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question 4 an endothermic reaction ____ energy. absorbs destroys releas…
A. absorbs
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9 which criterion is primarily used in the modern periodic table, and w…
C. Atomic number, representing the number of protons in the nucleus
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an endothermic reaction ____ energy. absorbs destroys releases creates
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7 which of the following elements is a metalloid and is commonly used i…
B. Silicon, D. Germanium
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what happens to matter during a chemical reaction according to the law …
A. Matter is conserved.
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how many oxygen atoms are present on the reactant side before balancing…
a. 2
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in the equation $ch_4 + o_2 \to co_2 + h_2o$, what is unbalanced? a. hy…
c. Both hydrogen and oxygen atoms
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when atoms combine, they form: protons cells elements molecules
D. molecules
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when atoms combine, they form: protons cells elements molecules
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question 2 1 pts which of the following is an element? sugar carbon sal…
B. carbon
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which of the following is an element? o sugar o carbon o o water
carbon
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which of the following is an element? o sugar o carbon o o water
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in the equation $ch_4 + o_2 \to co_2 + h_2o$, what is unbalanced? a. hy…
# Ex[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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what is the correct coefficient for h₂o when balancing the equation ch₄…
A. 2
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in the combustion of methane $ch_4 + 2o_2 ightarrow co_2 + 2h_2o$, how …
d. 4
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which description is an example of direct characterization? a. amir was…
A. Amir was always in good spirits — his laugh would bubble through the room, infecting those around him with giggles.
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question 25 which of the following is an example of a physical property…
Texture
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chemical properties describes changes in density or phase describe chan…
C. Describes the Chemical composition of a substance
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read this sentence from the passage. morgan, realizing that he had inve…
C. a fluid chemical mixture
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when your body takes the chemical energy in food and transforms it so y…
Question 1: Mechanical energy Question 2: Thermal energy Question 3: True
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question 3 at what point on a roller coaster is the kinetic energy incr…
Question 3: A. As it is going down the hill Question 4: Gravitational potential energy
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the substance is a gas at point ______
F
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what type of energy is formed when chemical bonds are broken? radiant e…
- Question 3: Chemical energy - Question 4: 8 (assuming a comprehensive list - there are many types of energy and 8 is the highest option given here)
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which of the following is an example of mechanical energy? the light fr…
- Question 1: The energy in a ball as it is falling. - Question 2: A washing machine - Question 3: Chemical energy
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which of these molecular formulas is a carbohydrate? c₁₄h₂₈o₂ c₉h₁₃no₃ …
$C_4H_8O_4$
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this exam is closed - book. before starting, make sure you have studied…
B. whose manufacture, possession, or use is regulated by government
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this exam is closed - book. before starting, make sure you have studied…
D. observations about the patient's mentation
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as you heat up a pot of water, what accurately describes what happens t…
evaporated
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which list of the phases of h₂o is arranged in order of increasing spac…
ice, water, steam
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multiple - choice question for our purposes we are going to simplify th…
B. H + H --> He
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an element located in group 18 and period 4 would be classified as whic…
Non - metal
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question 6 4pt magnesium (mg) is an example of a: metalloid metal no an…
Metal
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physical science the average velocity v of gas molecules is represented…
$407$
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fe (iron) can be found on the periodic table. iron is an example of a e…
A. Element
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vinegar is a liquid mixture of both ch3co2h and h2. vinegar is an examp…
C. Homogeneous mixture
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question 3 4 pts which of the following is an example of a heterogeneou…
chicken noodle soup.
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example #1: atomic radii 1. which of the following elements will have t…
1. d) F 2. d) Ba 3. c) Br
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which acts like an acid. amino acids also contain a third functional gr…
A. an amino group and a carboxyl group