化学
化学反応、化学量論、分子構造、元素の性質。
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4. which quotation from the poem best highlights how the speaker views …
A. "I'm truly sorry Man's dominion / Has broken Nature's social union" (Lines 7 - 8)
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4) of the properties listed below for the metal magnesium, which would …
✓ ignites when heated
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what is the iupac name for the compound shown? iupac name:
2,2,3-trimethylpentane
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16) 300.0 g of water is at 12.0°c. the water absorbs 4016 j of heat ene…
$\boldsymbol{15.2^\circ\text{C}}$
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15) silicon, used in computer chips, has a heat capacity of 0.712 j g⁻¹…
$\boldsymbol{99.4\ \degree\text{C}}$ (Option: $\square$ 99.4 °C)
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13) 45.0 g of water is at 20.0°c. the water releases 2000 j of energy a…
$\boldsymbol{282\ \text{K}}$
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11) what is the specific heat of a solid that requires 124 j of heat to…
0.26 J/g°C
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10) a 250 g rod of tantalum absorbed 10.1 kj and changed temperature fr…
0.180 J/g°C
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9) how many joules of heat are required to heat 25.0 g of ethyl alcohol…
$\boldsymbol{2.99 \times 10^3\ \text{J}}$ (Option: $\square$ 2.99 x 10³ J)
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8) in the reaction ag(s) + 2 hno3(aq) → agno3(aq) + no(g) + h2o(l) the …
$\boldsymbol{\text{AgNO}_3(aq), \text{NO}(g), \text{H}_2\text{O}(l)}$
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6) which of the following is an example of potential energy? (1pts) car…
snow boarder at the top of hill
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5) which of the following is a chemical change? (1pts) water evaporates…
□ a penny tarnishes
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4) of the properties listed below for the metal magnesium, which would …
☑ ignites when heated
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3) an example of a physical property is: (1pts) tnt is explosive gasoli…
none of these choices
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2) which is an example of a physical change? (1pts) □ steam from the bo…
Steam from the boiling water condenses on the cooler part of the ceiling.
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for the substituted cyclohexane compound shown, identify the atoms that…
E (CH₃), C (F), F (H), K (Cl), J (H)
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graded assignment you will fill in your assignment sheet that aligns wi…
4. element 5. atoms 6. sharing 7. transferring (or transferring/transfer of)
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• assume that all fruit juice solutions are 100% concentrated at the be…
If we assume total volume is 100 mL (approximate), the percent strength of Juice A is $25\%$. If we use the given volumes, it's approximately $25.51\%$. (The answer depends on the…
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what is the iupac name for the compound shown? iupac name:
2,2-dimethylpentane
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1. objective use the phet simulation to _______ (1) different molecules…
1. (1): **build** 2. (2): **bond together** 3. (3): **formulas**
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what is the iupac name for the compound? iupac name:
2-methyl-1-butanol
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what is the iupac name for the compound? iupac name:
2-methyl-1-butanol
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a client who is receiving chemotherapy is prescribed ondansetron. which…
A. Headache
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click and drag on elements in order rank the steps used to solve mole -…
1. Balance the chemical equation and interpret the equation in terms of moles. 2. Convert the amount of the given substance from grams to moles, if grams are given. Use the invers…
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multiple choice question during the reaction shown below, 5.0 moles of …
D. Balance the chemical equation and interpret the equation in terms of moles.
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click and drag on elements in order during a reaction, 3.5 g of carbon …
1. \(2\text{CO}(g) + \text{O}_2(g) ightarrow 2\text{CO}_2(g)\) 2. \(3.5\ \text{g CO} \times \frac{1\ \text{mol CO}}{28.01\ \text{g CO}} = 0.1250\ \text{mol CO}\) 3. \(0.1250\ \tex…
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what is the molarity of a solution in which 5.6 moles of sodium nitrate…
$1.1\ \frac{\text{mol}}{\text{L}}$
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a solid is brittle and has entirely bonded atoms, as seen in the partic…
network
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what is the dominant intermolecular force found between formaldehyde mo…
dipole-dipole forces
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consider the reaction for the combustion of acetylene.\\(2\\ce{c_{2}h_{…
$26.4$ L $\text{C}_2\text{H}_2$
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what is the temperature (in k) of 16.45 moles of methane gas in a 70.7 …
245 K
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how many moles of cl₂ are in a container with a volume of 7.5 l at stp?
Approximately 0.33 moles of $\text{Cl}_2$
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instructions: classify each of the following properties of matter as ph…
21. [P] 22. [P] 23. [C] 24. [C] 25. [P] 26. [C] 27. [P] 28. [P] 29. [P] 30. [P] 31. [P] 32. [P] 33. [C] 34. [P] 35. [P] 36. [C] 37. [P] 38. [P] 39. [C] 40. [C]
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instructions: classify each of the following as an element e, a compoun…
11. [E] Gold 12. [C] Water 13. [M] Seawater 14. [C] Sugar 15. [M] A chocolate sundae 16. [M] Air 17. [C] Carbon dioxide 18. [E] Silver 19. [C] Ice 20. [M] A Big Mac®
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instructions: write e in the blank if the material is heterogeneous or …
1. E 2. O 3. O 4. E 5. O 6. E 7. E 8. O 9. O 10. O
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how many covalent bonds is nitrogen (group 5a) likely to form? (1 point…
three
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which kind of bond would occur between sodium (na, group ia) and chlori…
ionic
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between which types of elements do ionic bonds occur, and how do electr…
metals and nonmetals, electrons transferred
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use the list to answer the question. - potassium, group ia - calcium, g…
potassium and iodine
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fluorine has 7 valence electrons. which charge is its ion likely to hav…
1-
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which information about an atom can a period number give you? (1 point)…
how many energy levels it has
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when moving across a period from left to right in the periodic table (e…
Valence electrons increase by one
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5. which of the following excerpts best illustrates how napoleon justif…
### Question 5: D. "Suppose you had decided to follow Snowball, with his moonshine of windmills — Snowball, who, as we now know, was no better than a criminal?" (55) ### Question …
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in all areas of the world, groundwater is an important source of drinki…
D. use of organic fertilizers (manure) in farming
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a student measures the molar solubility of silver carbonate in a water …
$8.59 \times 10^{-12}$
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a student measures the oh⁻ concentration in a saturated aqueous solutio…
$2.13 \times 10^{-8}$ (rounded to three significant figures)
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for each of the following names, write the appropriate formula for it. …
$N_2O_3$ ### 2) nitrous acid
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use the references to access important values if needed for this questi…
$0.0172$ M
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for each of the following formula, name it appropriately. (spelling doe…
Chloric acid ### 2) $\boldsymbol{\ce{P_2O_5}}$
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application: use the appropriate rules to write the following names and…
### Problem 1 #### Part a # Explanation: ## Step1: Identify elements and prefixes Sulfur (S) has no prefix (mono), hexabromide means 6 bromine (Br) atoms. ## Step2: Write formula …
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solution a = 10⁻³ m and solution b = 10⁻⁵ m solution a = 12.23% (w/v) a…
## Solution A Is More Concentrated Than B: - Solution A = $10^{-3}$ M and Solution B = $10^{-5}$ M ## Equal Concentrations: - Solution A = 0% (w/v) and Solution B = 0% (w/v) ## So…
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in the laboratory, a general chemistry student measured the ph of a 0.5…
$6.9 \times 10^{-4}$ (or $6.86 \times 10^{-4}$ for more precision)
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in the laboratory, a general chemistry student measured the ph of a 0.5…
$1.97 \times 10^{-4}$
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glycerol boils at a higher temperature than water. what does this indic…
C. They are stronger than those in water
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valerie wants to examine the properties of a thick liquid but is findin…
B. applying heat to the liquid
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7. match the following structures with their name. a. b. h o h h h-c-c …
aldehyde (carbonyl): A. $\ce{CH3CHO}$ ketone: B. $\ce{CH3COCH3}$ carboxyl: C. $\ce{CH3COOH}$ amine: D. $\ce{CH3NH2}$
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melting can be best described as a process in which molecules lose kine…
D. gain enough kinetic energy to get past each other. (Assuming the last option is labeled D; if the original labels differ, adjust the identifier, e.g., if the last option is the…
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which molecules would most likely cause a liquid to have the lowest vis…
B. small, nonpolar molecules
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which process most likely takes place when the kinetic energy of molecu…
boiling
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what happens when a solid is dissolved into a liquid? solid particles f…
C. Solid particles become evenly dispersed among liquid particles.
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6. match the following structures with their name: a. b. h h h-c-n h-c-…
amine: A. $\ce{H3C-NH2}$ (structure A) sulhydryl: B. $\ce{H3C-SH}$ (structure B) aldehyde: C. $\ce{H3CH2-CHO}$ (structure C) phosphate: D. $\ce{H3C-O-PO3^{2-}}$ (structure D)
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5. match the structures with there name a. —oh c. —nh₂ b. —c—o—h d. — s…
hydroxyl group: A. —OH carboxyl group: B. $\boldsymbol{-\text{C}(=\text{O})-\text{O}-\text{H}}$ amine group: C. —NH₂ sulfhydryl group: D. —SH
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4. what is the structure? ho—c(=o)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)…
fatty acid
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rare earth elements replace each question with a full sentence answer t…
There are 17 Rare Earth elements (15 lanthanides plus scandium and yttrium). ### Question 2 (c):
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noble gases replace each question with a full sentence answer the quest…
The group number of noble gases is 18. ### 2.
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nonmetals replace each question with a full sentence answer the questio…
Nonmetals are found in group numbers 14, 15, 16, 17, and 18 of the periodic table. ### 2.
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data was collected for a sample of organic snacks. the amount of sugar …
\(n = 42\)
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use your understanding of the ideal gas law to identify the correct rel…
- Pressure: Directly proportional to temperature and moles, inversely proportional to volume (exact wording depends on dropdown options, e.g., if options are "directly proportiona…
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what information does the coefficient tell us in a chemical formula? am…
B. Amount of molecules
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mg+h2o → mg(oh)2+h2 our group can carry an oxidative state of +2 and ca…
Alkaline Earth Metals
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which of the following groups of elements contain the most reactive met…
transition elements
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what information does the subscript tell us in a chemical formula? unt …
Amount of elements
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how many protons does lithium have? 3 7 4
3
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side to side rows on the periodic table are periods groups
periods
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balance this equation: mgcl₂ --> mg₄+ cl₂ 4mgcl₂ --> mg₄+ 4cl₂ it’s alr…
A. $4\text{MgCl}_2 ightarrow \text{Mg}_4+ 4\text{Cl}_2$
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how many elements are in the chemical formula h₂o? 2 4 1 3
2
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nitrogen gas + hydrogen gas forms ammonia gas. type of reaction = _____…
Synthesis
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am i a cation or an anion? how many electrons do i have? hint remember …
anion, 10 electrons
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stephanie is riding her bicycle to the park. the chemical energy used t…
C. mechanical energy
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what energy transformation occurs when a battery - powered flashlight i…
C. chemical to electrical to light
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according to the icd-10-cm official coding guidelines, if the patient i…
Malignancy
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drop size = 1ml/number of drops volume of objects object\twater volume …
To find the volume of each object, we use the principle of water displacement, where the object's volume is the difference between the water volume with the object and the water v…
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question 13 (1 point) listen which of the following are intensive prope…
Question 13: a) The density of copper is 8.94 g/cm³. d) The molar mass of nitrogen is 14.0 g/mol. e) Bromine gas has a reddish-brown color. Question 14: d) Broiling a steak on a g…
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question 11 (1 point) listen 42.0 ml of a liquid has a mass of 35.00 g.…
0.833 g/mL --- ### Question 12
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based on the data you collected, how would you expect soap to behave wh…
The amount of bubbles produced by the soap should decrease.
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question 10 (1 point) listen which one of these represents a physical c…
c) Water, when heated, forms steam
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question 8 (1 point) listen if a liquid with a specific gravity of 0.88…
5.63 mL --- ### Question 9
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question 6 (1 point) listen which one of these represents a chemical ch…
Question 6: b) Turning hair yellow with bleach Question 7: a) Boiling an egg. c) Burning gasoline.
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why did adding mineral oil decrease the volume of bubbles (suds) formed…
B. Mineral oil is nonpolar, so it interacts with the long nonpolar hydrocarbon chain, disrupting the soap micelle. (Note: In the original options, the second option's text is "Min…
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given the specific gravity of methyl alcohol 0.791, what is the mass of…
1. Mass of methyl alcohol: $1980\ \text{g}$ (or $1.98\ \text{kg}$) 2. Volume of benzene: $97.25\ \text{mL}$ 3. Volume of titanium cube: $0.134\ \text{cm}^3$ 4. Original water volu…
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1.6 specific gravity explain the difference between density and specifi…
1. **Difference between density and specific gravity**: Density is a measure of mass per unit volume of a substance (has units like $\text{g/cm}^3$). Specific gravity is a unitles…
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1.2 physical and chemical properties define and list examples of: physi…
1. **Physical properties** - Definition: Observable without altering chemical identity - Examples: Color, density, melting point, mass, volume 2. **Chemical properties** - Definit…
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unit 1 – foundations of chemistry – guided notes 1.1 classifying matter…
1. **Differences between solids, liquids, and gases**: - Solids: Have a fixed shape and fixed volume; particles are tightly packed in a regular arrangement, with only vibrational …
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which statement is the most effective claim? organic foods are a health…
A. Organic foods are a healthier option than conventional foods.
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background information: this is an excerpt from a speech given by egypt…
B. to protect its independence and liberty
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a vineyard has 145 acres of chardonnay grapes. a particular soil supple…
\( 3.23\times 10^{3}\) (or 3230)
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part a how many cubic centimeters are there in 2.11 yd³? express your a…
\(1.61\times10^{6}\) (or \(1610000\))
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the atomic number, which is the number of protons, is used to identify …
Protons: 10 Neutrons: 12 Electrons: 10 (the second option)
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question what is the symbol for the element scandium? scandium is in th…
D. Sc
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what is the symbol for the element germanium? germanium is in group 4a(…
A. Ge