Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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question 4. match the following pairs of ions with the correct chemical…
a) \( \text{Ba}^{2+}, \text{S}^{2-} \): \( \text{BaS} \) b) \( \text{Ca}^{2+}, \text{N}^{3-} \): \( \text{Ca}_3\text{N}_2 \) c) \( \text{Cu}^{2+}, \text{I}^- \): \( \text{CuI}_2 \)
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question 1. element x reacts with chlorine to form an ionic compound th…
B. Group 2
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part f: use the periodic table to answer the following questions. name\…
Filled table (key values): | Name | Symbol | Atomic # | Atomic Mass | Mass # | P | N | e⁻ | |------------|--------|----------|-------------|--------|-----|-----|-----| | Iron | Fe…
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section 1 — multiple choice 1. mechanical weathering involves— a. chang…
B. Breaking rocks into smaller pieces without changing composition ### Question 2
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the earths layers are divided up by
physical and chemical properties (or composition and mechanical behavior)
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annotation requires the following 1. number paragraphs 2. write a summa…
### Paragraph Numbering and Summaries: 1. **Paragraph 1** *Summary*: Explains chemical bonds as forces holding atoms in compounds, via electron transfer/share. 2. **Paragraph 2** …
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there were papers on the desk, a litter of papers scrawled over, in the…
bad events), humor, or sentimentality in the voice's urgent, secretive tone.
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annotation requires the following 1. number paragraphs 2. write a summa…
### Paragraph Numbering and Summaries: 1. **Paragraph 1** *Summary*: Explains chemical bonds as the force holding elements in compounds, defining a bond and how electrons enable i…
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annotation requires the following 1. number paragraphs 2. write a summa…
### 1. Number Paragraphs 1. When a compound such as salt, sugar, copper sulfate, or glucose are formed, the elements in each compound are held together by what are called chemical…
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annotation requires the following 1. number paragraphs 2. write a summa…
### 1. Number Paragraphs 1. When a compound such as salt, sugar, copper sulfate, or glucose are formed, the elements in each compound are held together by what are called chemical…
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annotation requires the following 1. number paragraphs 2. write a summa…
### Step 1: Number Paragraphs 1[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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annotation requires the following 1. number paragraphs 2. write a summa…
### Numbering Paragraphs (assuming the text is as provided with the framed content): 1. When a compound such as salt, sugar, copper sulfate, or glucose are formed, the elements in…
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annotation requires the following 1. number paragraphs 2. write a summa…
### 1. Number Paragraphs 1. When a compound such as salt, sugar, copper sulfate, or glucose are formed, the elements in each compound are held together by what are called chemical…
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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read the excerpt from \how we entered world war i.\ in the midst of it …
A. show the reader that Germany was a legitimate threat to the United States.
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ake it new!: early modernism the wife-woman maker-of-sevens in the sche…
the use of free verse in "Mending Wall"
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the wife-woman mending wall the wife-woman by anne spencer maker-of-sev…
The option "Both use blank verse" (the fourth option in the list of choices).
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \(2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{OF}_2(\text{g})\)
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7. which of the following is a key component of a dramatic monologue? a…
a. Revelation of the speaker’s inner thoughts and feelings
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question 51 not yet answered marked out of 1.00 flag question convert 1…
\( 0.15 \) ### Question 52
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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we next went to the school of languages, where three professors sat in …
a. Willingness to sacrifice practicality for theoretical purity. ### Question 18
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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104. your client would like more volume in one specific area. what solu…
To address these questions, we analyze each one based on cosmetology (a subfield of Natural Science, specifically related to health and beauty services): ### Question 105 - **Expl…
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your science teacher is cleaning out the storage room and finds unlabel…
Samples (e.g., Sample #1, Sample #3, Sample #4) that show luster, malleability, and good electrical/thermal conductivity (based on table properties) are classified as metals. (Exa…
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diamonds and graphite are both pure carbon. they are both pure substanc…
The first option (The layered structure of graphite allows the layers to slide past each other.)
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part of the periodic table is shown. using the information from the cha…
118
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part of the periodic table is shown. using the information from the cha…
51
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part of the periodic table is shown. using the information from the cha…
35.5
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sample color state of matter at room temp texture conducts electricity …
Sample #1
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9/10 substances that form as the result of a chemical reaction reactant…
B. products (assuming the second option is labeled as B, with text "products")
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select all the reactants
The middle box (with two "Mg" labeled gray circles) and the right box (with red diatomic molecules) are the reactants. So select the middle box (containing two Mg atoms) and the r…
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select all the products
The Left - most option (the card with two pairs of one red and one gray circle)
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6/10 what is underlined in the chemical equation below? na + cl ---> na…
Reactants
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in the chemical equation below, the product is... na + cl -> nacl
NaCl (or the option with "NaCl" as the product, e.g., if options are as per the image, the one labeled NaCl)
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select all the reactants
The Left Image ( \( \text{O}_2 \) ) and The Middle Image (C)
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3/10 substances present at the start of a chemical reaction reactants p…
A. reactants (assuming the first option is labeled A, but based on the content, the correct term is "reactants" corresponding to the first blue box labeled "reactants")
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2/10 what is underlined in the chemical equation below? na + cl ---> na…
Products (the left - side option labeled "Products" in the interface)
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a candle wick burning is an example of a options: neutrons, chemical re…
B. chemical reaction
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jordan adds 20 grams (g) of salt and 200 g of dry beans to a pot of war…
The option "a mixture that can be separated back into its parts through physical processes" (the third option among the four presented).
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pancake syrup is mostly made up of sugar and water. when a syrup bottle…
B. a mixture of two compounds (assuming the second option is labeled B; if the original labels were different, adjust the identifier, but based on the description, the second opti…
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during which steps does the container hold a mixture? steps 1, 2 and 3;…
Steps 2 and 3, only
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22. which model contains only one compound?
T (Assuming T is the model with identical compound molecules. If labels are as per typical problems, the correct model is the one with all molecules of the same compound, e.g., if…
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1. which of the following observations is the best evidence that unknow…
B. Liquid X boils away completely at a single temperature
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which of the following is an element? cu(so₄)₃, mgbr, o₂, hcl
\( \text{O}_2 \) (the option with \( \text{O}_2 \))
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based on the methods used to separate the substance into its parts, is …
No, it is a mixture, because physical methods were used to separate its parts. (Assuming the second option in the display is the correct one with this text; if options are labeled…
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read the excerpt from \how we entered world war i.\ in the midst of it …
C. show the reader that Germany was a legitimate threat to the United States.
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hess’s law and the enthalpy of combustion of magnesium magnesium ribbon…
Natural Science - Chemistry
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question: 12 of 40 which of the following elements are the same in medi…
A. Active ingredients, dosage form, route of administration, and strength
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module 2 - medication prescriptions: general quiz question: 7 of 40 whi…
It is the trademarked name given to a medication by a manufacturer.
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29. ca(oh)₂ 29. ______%ca ______%o ______%h 30. a compound contains 30.…
\( \% \text{Ca} \approx 54.09\% \), \( \% \text{O} \approx 43.19\% \), \( \% \text{H} \approx 2.72\% \) ### Problem 30: Molecular Formula of Compound with \( 30.45\% \, \text{N} \…
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82. list the following atoms in order of lattice energy (lowest to high…
s: ## Problem 82: Order (lowest to highest): $\boldsymbol{\text{RbBr, NaCl, CaCl}_2\text{, Na}_2\text{O, SrS}}$ ## Problem 83–90 (Yes/No): 83. Malleable: $\boldsymbol{\text{Yes}}$…
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physics semester 1 review name date per 3. as the temperature of a subs…
### Conceptual Answers: 3. The average molecular spacing generally increases (thermal expansion, molecules move more with higher KE). 4. Water expands (becomes less dense) (anomal…
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2. maryanne has found several reports on a new type of chemotherapy tha…
D. a study funded by the National Institutes of Health
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for each of the following chemical formulas, write the correct name of …
57. Sodium Iodide 58. Calcium Chloride 59. Lead(II) Oxide 60. Magnesium Oxide 61. Lithium Hydrogen Sulfate 62. Ammonium Bromide 63. Calcium Nitride 64. Copper(I) Sulfate 65. Potas…
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multiple-choice question what is an endothermic reaction? a chemical re…
a chemical reaction that removes heat energy from the surroundings
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which best demonstrates proper organization in a body paragraph? eviden…
a reason supported with evidence
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which best demonstrates proper organization in a body paragraph? done s…
1. (For the body paragraph organization question, the answer would depend on the options in the dropdown, but since it's marked done, we assume it's correct as per the task's cont…
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the following data were measured for the reaction 3 a + b → 3 c: experi…
s: - Top Reaction Rate: \( \approx 3.47 \, \text{M/s} \) - Problem 6 Rate: \( \approx 3434 \, \text{M/s} \) (matches given) - Problem 7 Rate: \( \approx 2950 \, \text{M/s} \) (or …
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when atoms bond together they form a(n) select element atom atom ant mo…
molecule
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molar volume, density, and molar mass of a gas 59. use the molar volume…
15.2 L (or 15.232 L, depending on precision)
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the four temperature scales are the select that converts to select sele…
For the first [Select] (temperature scale), the correct options from the given list are: Celsius, Calvin (assuming it's a typo for Kelvin). But among the provided options, the tem…
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which of the following metaphorically describes cash control procedures…
C. knights protecting their king (assuming the options are labeled A, B, C with A: pawns uniting and overthrowing their king, B: bishops scheming to usurp their king, C: knights p…
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1. which of the following best defines a mineral a. any solid found on …
B. A naturally occurring inorganic solid with a crystal structure ### Question 2
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what is the mathematical formula for computing mass percent composition…
The first option: \( \text{mass \% of element } X=\frac{\text{mass of } X \text{ in one mole of compound}}{\text{mass of one mole of the compound}}\times 100\% \)
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part a what is the mass percent of carbon in oxalic acid, h₂c₂o₄? 2.24 …
26.7 (corresponding to the option with 26.7)
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conduction ↔ { } radiation ↔ { } evaporation ↔ { } convection ↔ { } hea…
- Conduction: Heat transferred molecule to molecule; contact is required for energy transfer - Radiation: Emission of infrared energy (rays); contact is not required for energy tr…
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part a what is the mass percent of na in sodium chloride? 39.3 47.5 60.…
A. 39.3
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fill in the blank question the change from a liquid to a gas state is c…
vaporization
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part a an iron chloride compound contains 55.85 grams of iron and 106.5…
$\boldsymbol{FeCl_3}$ (corresponding to the option "FeCl₃")
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article - directions: read and annotate the article following the annot…
Natural Science - Chemistry
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article - directions: read and annotate the article following the annot…
Natural Science - Chemistry
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fill in the blank question the change from a liquid to a gas state is c…
vaporization
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when the united states entered world war ii, harry hess was a ______ at…
B. Geology Professor
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multiple choice question what is amination? - addition of a nh₂ to a mo…
A. Addition of a $\ce{NH2}$ to a molecule
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163.26 g/mol, c₁₁h₁₇n express your answer as a chemical formula. □a che…
# Explanation: ## Part A: ### Step 1: Calculate molar mass of $\ce{C11H17N}$ Molar mass of C = 12.01 g/mol, H = 1.008 g/mol, N = 14.01 g/mol. Molar mass of $\ce{C11H17N}$ = \(11\t…
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missed this? watch kcv: calculating empirical formulas for compounds, s…
ZnO
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part one: physical or chemical property? fill in the chart using the vo…
### Chemical Properties Table: | Chemical Property | Definition | |------------------------|-------------------------------------| | Flammability | The ability to burn | | Ability…
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multiple choice question which is characteristic of vitamins? you can n…
B. They are necessary to metabolism (assuming the option with "They are necessary to metabolism" is labeled as B; if the original options had different labels, adjust the label ac…
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vocabulary word | definition physical property | physical change | chan…
| VOCABULARY WORD | DEFINITION | |-------------------|----------------------------------------------------------------------------| | Physical Property | Characteristic observed/m…
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this worksheet will help you do this. first, use the book to define the…
1. P 2. P 3. C 4. P 5. P 6. C 7. C 8. P 9. P 10. P 11. P 12. P 13. P 14. C 15. C 16. P 17. P 18. P
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which type of molecule has charges that are unevenly spread out causing…
polar molecules
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during a chemical reaction, which of the following does the arrow stand…
B. yields
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what is an example of an exothermic reactions? combustion melting ice p…
A. combustion
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multiple-choice question what is an exothermic reaction? a chemical rea…
a chemical reaction that puts heat into the surroundings
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part b read each scenario. decide whether a physical or chemical change…
Physical or Chemical Change? : Chemical Evidence... : The bread turns black (new substance, charred) and smoke (new gas) is produced, showing a chemical reaction (burning/combusti…
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what type of cycle is the water cycle? a living, biotic cycle a discont…
a biogeochemical cycle
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how do chemicals store potential energy? in the electrons of atoms in t…
B. In the bonds between atoms (assuming the second option is labeled B; if no labels, then "The middle option: In the bonds between atoms")
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what shell contains the valence electrons for an aluminum atom? middle …
C. outermost shell (assuming the options are labeled A: middle shell, B: innermost shell, C: outermost shell; if the original options had different labels, adjust accordingly, but…
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multiple choice question a calorie is the amount of heat that will rais…
C. 1 gram
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6) differences in gravitational potential energy depend on an objects _…
B) mass and height ### Question 7
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which letter represents activation energy? free energy progress of reac…
The letter representing activation energy is the one corresponding to the vertical distance from reactants (A) to the transition state peak, which is \( \boldsymbol{C} \) (or the …
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1) moving a book to a lower shelf decreases its potential energy. true …
True ### Question 2
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6) which has kinetic energy? a) a tank of gasoline b) a moving car c) a…
B) a moving car ### Question 7
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what is potential energy? the energy of molecules in motion the energy …
To determine the correct definition of potential energy, we analyze each option: 1. "The energy of molecules in motion" describes **kinetic energy** (energy of motion), not potent…