Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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which of the following is a chemical property of copper? a it is a good…
D. It reacts in moist air to produce green copper carbonate.
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which statement describes a chemical property of an element? a potassiu…
C. Silver reacts with hydrogen sulfide.
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which term identifies a chemical property that can be used to different…
C. reactivity
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the particle diagram below represents a sample of matter. which best de…
C. a mixture of elements
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question 6 balance the following the chemical equation: ____ al + ____ …
Blank 1: 4 Blank 2: 3 Blank 3: 2
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unit 8: world war i gateway book | chapter 8, page 187 | vocabulary | d…
A political/social/ideological movement emphasizing loyalty to a nation, prioritizing its interests, with national identity/pride and often a push for self - determination/unity/i…
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drag and drop the correct answer choice to each answer blank. or, kruch…
First blank: A. hydrogen chloride Second blank: E. covalent (or D. polar covalent, as HCl is a polar covalent compound due to electronegativity difference between H and Cl, and th…
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qa 37 disscloss drag and drop the correct answer choice to each answer …
49, g
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35. potassium chlorate decomposed into potassium chloride and oxygen ga…
19.7 grams
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q# 34. _nh₃ + o₂ → _n₂ + _h₂o after correctly balancing this chemical e…
4
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33. the commercial production of ammonia, nh₃, can be represented by th…
10 grams, because the total mass of the nitrogen reactants are conserved. (The correct option is the first one with the reasoning based on the Law of Conservation of Mass where to…
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31. what is the mass percent of carbon in glucose, c₆h₁₂o₆? 40.00% c 25…
40.00% C (the option with "40.00% C")
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what is the difference in the number of valence electrons for element a…
6
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q 29. a student burns 1.50 mol c₃h₈ according to the following reaction…
The correct option is the one with \( 1.98\times10^{2}\space g \) (assuming the option is labeled as, for example, D. \( 1.98\times10^{2}\space g \)). Wait, in the image, the last…
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26. ammonia is a very commonly used covalent compound. its scientific n…
D. \(NH_3\) (assuming the options are labeled with D for the last option, but based on the options given, the correct one is the last option with \(NH_3\))
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part b what type of bonding occurs in the compound from part a? nuclear…
C. covalent
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this question has two parts. first, answer part a. then, answer part b.…
B. calcium chloride
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24. directions drag and drop the correct answer choice to each answer b…
$2\ \ce{AgNO_{3}}$
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23. what are the respective coefficients needed to balance the equation…
1, 3, 2 (corresponding to the option "1, 3, 2")
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lanthanide series actinide series calculate the percentage of nitrogen …
82.3
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1. directions drag and drop the correct answer choice to each answer bl…
\(\ce{Fe(NO3)2}\)
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20. what is the mass percentage of the element carbon in a molecule of …
40
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question 5 balance the following the chemical equation: ____ mg + ____ …
Blank 1: 2, Blank 2: 1, Blank 3: 2 (The balanced equation is \( \boldsymbol{2Mg + O_2 \to 2MgO} \)) ### Question 6
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19. \\(2\\text{hcl} + 2\\text{na} \\longrightarrow \\underline{\\quad} …
4
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18. antimony is burned in oxygen to form antimony oxide. 4 sb + 3 o₂→ 2…
13.3 moles (corresponding to the option "13.3 moles")
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question 5 balance the following the chemical equation: 1mg, 20 1mg, 01…
Blank 1 (Mg coefficient): 2 Blank for \( \text{O}_2 \) coefficient: 1 Blank for \( \text{MgO} \) coefficient: 2 (Assuming the blanks correspond to coefficients of Mg, \( \text{O}_…
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13. vinegar, a common household item, is used in cleaning, cooking, bak…
The percent composition of carbon in acetic acid is calculated as follows: 1. **Molar mass of \(CH_3COOH\) (\(C_2H_4O_2\))**: \(2 \times 12.01\ (C) + 4 \times 1.008\ (H) + 2 \time…
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represent nonmetals, and the other colors represent metals or noble gas…
The three correct answers (assuming the nonmetallic elements are, for example) are: B. [Element B], D. [Element D], E. [Element E] (or other valid nonmetal combinations based on t…
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10. what is the percentage of the element aluminum in the compound alum…
53
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given the following chemical reaction: $2\\text{al} + 3\\text{h}_2\\tex…
290 g
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8. what is the empirical formula for the compound that has 46 grams of …
$\boldsymbol{Na_2S_2O_3}$ (the fourth option: D. $Na_2S_2O_3$)
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known facts of sulfur (s) s 16 32.06 sulfur six valence electrons 3 ele…
16
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multiple response identify one or more choices that best complete the s…
s: 92. **b. It represents the isotope of carbon with a mass number of 14 amu.** **c. It represents the isotope of carbon which contains 6 protons.** 93. **b. Rutherford** 94. **a.…
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name: 82. a lab procedure instructs you to measure 35 ml of tap water, …
1. **82. d. 100 mL graduated cylinder** 2. **83. a. number of valence electrons in each atom.** 3. **84. d. $\text{SiO}_2$** 4. **85. d. $\text{Al(OH)}_3$** 5. **86. c. Metals** 6…
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on 5. directions drag and drop the correct answer choice to each answer…
- Atomic Number: 17 - Mass Number: 35 - Number of Electrons: 17 (Adjust based on the specific table blanks, but these are the core values from the model.)
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characteristic number number of negatively charged particles in the ele…
Number of negatively charged particles in the electron cloud: $\boldsymbol{17}$ Number of neutrally charged particles in the nucleus: $\boldsymbol{17}$ (if mass number is 34) or $…
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how are macromolecules made? options: biology polymerization monomeriza…
polymerization
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which box shows an electron in the electron cloud that is in the energy…
The electron in the dashed - circle on the innermost electron shell (the one closest to the nucleus, with the other electron in that shell) is in the energy level filled first. (A…
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what is the type of bonding represented by the compound in part a? opti…
C. covalent
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what is the type of bonding represented by the compound in part a? nucl…
# Brief[SSE Completed, Client Connection Error][LLM SSE On Failure]
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this question has two parts. first, answer part a. then, answer part b.…
B. calcium bromide (assuming the second option is labeled as B, with the text "calcium bromide") (Note: Since the original options' numbering/labeling (like A, B, C, D) is not ful…
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question 5 ______ ______ created a stalemate in the early part of the w…
B. trench warfare
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b. paint drying on walls c. all of the choices d. clothes drying on a l…
d. All of the above
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7. the molecules of a liquid which are being converted into vapors must…
d. All of the above ### Question 8
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72. name the compound $\\ce{n2o4}$. a. sodium tetroxide c. nitrous oxid…
72. **b. Dinitrogen tetroxide** 73. **c. 12** 74. **d. Copper (II) carbonate** 75. **d. $\boldsymbol{Sn(CrO_4)_2}$** 76. **c. percent abundance.** 77. **c. more electrons.** 78. *…
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16 an atom will form a _?__ bond with another atom. see # 10(this means…
alkali ### Question 22: What is the most electronegative element? What is the trend moving down the group?
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63. an element is identified by its a. atomic mass c. number of neutron…
63. **b. atomic number** 64. **a. To keep the hot beaker from falling off the wire gauze while stirring.** 65. **b. carbon tetrafluoride** 66. **b. F** 67. **a. Nonpolar** 68. **b…
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55. please identify the violated rule in the orbital diagram below. a. …
1. 55. **a. Each orbital within a sublevel should get one electron of same spin before electrons are paired into the orbital.** 2. 56. **a. $[\text{Xe}] 6s^2 4f^{14}5d^{10} 6p^2$*…
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which of the following nonmetals is the most reactive? * 17 cl chlorine…
Fluorine (F)
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how many electrons can fit in a full d subshell? * 2 6 10 14
C. 10
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which of the lewis dot structures below is not accurate for the element…
B. Beryllium
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the simplest form of matter containing a characteristic set of properti…
C. element
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48. when looking at a density column, the most dense substance will be …
48. d. at the bottom 49. a. 1 electron in the s orbital 50. c. 0.00016 51. b. metal and nonmetal. 52. c. $\boldsymbol{ZnF_2}$ 53. a. A and D 54. a. increases.
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which is the correct statement of the periodic law? * \when elements ar…
B. "When elements are arranged by increasing atomic number properties repeat regularly"
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which orbitals hold an atoms valence electrons? * ○ d & f ○ s & p ○ p &…
B. s & p
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41. what is the formula for diphosphorus pentachloride? a. p₂cl₄ c. pcl…
1. **41. b. $P_2Cl_5$** 2. **42. d. 47.26% Cu, 52.74% Cl** 3. **43. a. Ask your teacher how to dispose of the extra.** 4. **44. a. 42. grams $H_2SO_4$** 5. **45. a. A proton has a…
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name: page: 1 of 2 33. name the compound zn(clo₃)₂. a. zinc dichlorate …
33. **b. Zinc chlorate** 34. **c. $1s^22s^22p^63s^23p^64s^23d^{10}4p^2$** 35. **a. a substance composed of a single type of atom that cannot be broken down.** 36. **c. Mg, S, Si**…
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27. which one of the following dot structures is incorrectly drawn? a. …
1. Q27: **c. $\boldsymbol{\ce{H2C=C=CH2}}$ incorrect Lewis structure** 2. Q28: **a. Demonstrated that the atom contained a dense, positively charged nucleus.** 3. Q29: **d. Octet …
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name: ____ 23. which of the following statements regarding dalton’s ato…
23. **c. All elements are composed of atoms, which are indivisible and indestructible particles.** 24. **a. 30** 25. **a. S and F** 26. **a. 7; +7**
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question 3. select the correct name for each compound below: a) nahco₃ …
s: a) Sodium Bicarbonate (or Sodium Hydrogen Carbonate) b) Iron(III) Nitrate c) Manganese(II) Perchlorate d) Potassium Phosphate
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16. what is the molar mass of cf₄? a. 86.0 g cf₄ b. 87.0 g cf₄ c. 88.0 …
16. **c. 88.0 g $\text{CF}_4$** 17. **c. noble gases** 18. **b. 55.5 amu** 19. **b. Fe** 20. **b. Energy must be absorbed.** 21. **d. 1, 1, 1** 22. **b. an increase in number of o…
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7. what is the formula for vanadium (iv) sulfate? a. $v_4so_4$ d. $v_2(…
1. **7. c. $\boldsymbol{\ce{V(SO_4)_2}}$** 2. **8. c. neutrons.** 3. **9. d. 5** 4. **10. a. $\boldsymbol{\ce{^{12}_{6}Q}}$ and $\boldsymbol{\ce{^{13}_{6}Q}}$** 5. **11. d. 0.769 …
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question 2. drag the correct name of the compound to match its chemical…
| Chemical Formula | Compound Name | | ---- | ---- | | $\ce{CuSO_{4}}$ | Copper(II) sulfate | | $\ce{NH_{4}NO_{3}}$ | Ammonium nitrate | | $\ce{Sn(OH)_{2}}$ | Tin(II) hydroxide | …
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multiple choice identify the choice that best completes the statement o…
1. d. $3.8 \times 10^{19}$ molecules $\text{Li}_2\text{CO}_3$ 2. c. $_{9}^{19}\text{F}^{-1}$ 3. e. $+2$ 4. b. $11$ 5. c. $20$ 6. c. $27$
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name blk. study, work problems, answer questions. write the info on a s…
The density of the liquid is \( 1.0\,\text{g/mL} \). ### Question 2 Solution:
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multiple-choice question which of the following will form individual io…
C. sodium chloride
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12. what is the maximum number of electrons that can fit in 3p? 4f?
The maximum number of electrons in \(3p\) is 6, and in \(4f\) is 14.
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multiple-choice question think: is it technically correct to call ionic…
A. no
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multiple-choice question why do sodium and chlorine ions stick together…
C. Because after the electron is transferred, the ions have opposite charges. (Note: Assuming the options are labeled A, B, C, D in order, the third option would be C. If the orig…
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multiple-choice question after giving an electron to more electronegati…
A. cation (positive)
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carbon that is underground in the form of fossilized animals cannot be …
a nutrient sink
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what is kinetic energy? energy stored within the bonds of molecules. en…
The option: "Energy that a substance has because of its motion." (the second option in the list)
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question 9 page 3 what is the term for the temperature at which a liqui…
C. Boiling point
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which process is given as an example of an endothermic process? the com…
Melting ice
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which of the following best describes an exothermic reaction? a reactio…
B. A reaction that releases heat energy into its surroundings.
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what is the primary focus of thermodynamics? the study of energy transf…
The study of energy transformations and relationships between heat, work, temperature, and energy.
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print name: chemis 4. will hydrazine dissolve in water? why or why not?
Yes, hydrazine will dissolve in water. This is because hydrazine is a polar molecule and can form hydrogen bonds with water molecules. According to the "like dissolves like" princ…
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3. sep engage in argument from evidence explain how your empirical and …
To support the idea, empirical data (e.g., mass of reactants = mass of products in a closed system) and qualitative data (e.g., reactants transform into products, no new atoms app…
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2. using electronegativities, find δen for n–h and identify the bond ty…
The value of $\Delta\text{EN}$ for N - H is $0.8$, and the bond type is polar covalent.
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molar relationships practice problems calculate the number of atoms in …
For 17.0 mol of germanium, the number of atoms is \( \boldsymbol{1.02 \times 10^{25}} \) (or \( 1.02374 \times 10^{25} \)) atoms. (Note: If you want solutions for other problems, …
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9) choose the correct answer. describe how sedimentary rocks are formed…
by the dissolving and precipitation of minerals in water ### Question 10
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chemical bonds and fundamental forces: most atoms aim for stability by …
B. electronegativity of an element
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chemical bonds are the connections between atoms. there are three main …
- Covalent: hydrogen chloride (HCl), oxygen ($O_2$) - Ionic: potassium bromide (KBr), magnesium oxide (MgO) - Metallic: silver (Ag), copper (Cu)
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chemical bonds and fundamental forces: one of the forces that governs a…
negatively charged particle
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chemical bonds and fundamental forces: the strength of electrical force…
C. They determine the melting and boiling points
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question 5 of 10 this makecode arcade game involves a sprite that can t…
The programmer should use non - color cues (like texture, shape, or auditory cues) or change the color scheme to a more color - blind - friendly one to distinguish between grass a…
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the periodic table is arranged in rows called periods and columns known…
A. They share the same number of valence electrons.
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5) choose the correct answer. the most common way sedimentary rocks are…
C. mechanical formation (assuming options are labeled A: freezing, B: heat, C: mechanical formation, D: chemical formation; if labels differ, adjust to the option with "mechanical…
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protons: neutrons: electrons: periodic table model: orbits cloud proton…
The subfield is Physics (under Natural Science).
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study the image. state of matter solid liquid gas arrange the forms of …
water vapor < liquid water < ice
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study the structure of water molecules. which statement best explains t…
The partially negative oxygen atom of a water molecule and the partially positive hydrogen atom of another water molecule attract one another.
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compare the substances. match each substance to its relative strength o…
- Lithium chloride, a kind of salt → very strong - Water → moderately strong - Methyl alcohol → weak
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move the correct option to the space to complete the sentence. the crys…
attraction
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a child jumped right up in bed, scared of a monster til mom said, \my d…
B. The poem’s rhyme scheme creates a playful mood.
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what is the effect of the rhyme scheme in this poem? i know you are out…
C. It creates a musical and lyrical quality.
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fill in the isotopes element\tnuclide symbol\tatomic number\tatomic mas…
Filled table as above (key values: \(\ce{_{22}^{47}Ti}\): 22, 47, 22, 22, 25; \(\ce{_{29}^{65}Cu}\): 29, 65, 29, 29, 36; \(\ce{_{42}^{100}Mo}\): 42, 100, 42, 42, 58; \(\ce{_{101}^…
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a cup of hot chocolate with a temperature of 80°c is placed on a table …
C. The molecules move more slowly as the velocity decreases.
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an experimental setup is shown here as a flame is added to a liquid unt…
A. The researcher should note at what temperature the liquid becomes a gas. D. The researcher should measure the temperature of the liquid with a thermometer as varying levels of …
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your class is studying phase change and kinetic energy. as part of a de…
C. Condensation occurs only when there is a drop in temperature.
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a student would like to compare different materials ability to minimize…
4. After 16 minutes add a new cup with hot chocolate