化学
化学反応、化学量論、分子構造、元素の性質。
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which property of water is likely the most significant in water’s role …
The electrons in water are shared unequally, creating a slight charge.
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atoms of which three elements could bond together to form an organic co…
D. carbon, hydrogen, and oxygen
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part 3 isotopes: use the information filled into the table to help you …
1. An atom is the basic unit of an element. Isotopes are atoms of the same element with different neutron numbers. 2. They have the same number of protons and electrons (in neutra…
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which of the following properties is not significantly influenced by di…
Mass
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which of the following is not true about dipole - dipole forces? they a…
They occur between all molecules.
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the dots in each diagram represent valence electrons orbiting the nucle…
A.
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4. what type of intermolecular force is unique to alcohols and signific…
Hydrogen bonding
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how many atoms can one carbon atom bond to? o up to 8 o up to 4 o a min…
up to 4
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8. how can you experimentally determine the relative evaporation rates …
Measure the change in mass of each liquid over time
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4. what type of intermolecular force is unique to alcohols and signific…
Hydrogen bonding
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which of the following factors can influence the strength of london dis…
All of the above
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which statement about hydrogen bonds and covalent bonds is true? covale…
Covalent bonds occur between atoms in the same molecule while hydrogen bonds between atoms of different molecules.
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5. which of the following is not a characteristic of hydrogen bonds? th…
They are stronger than covalent bonds
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which statement best explains why a carbon atom can form a variety of c…
It can bond with up to 4 other atoms.
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which of the following is not true about london dispersion forces? they…
They are stronger than dipole - dipole interactions.
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which statement about organic compounds is true? o organic compounds mu…
Organic compounds must contain carbon atoms bonded to other atoms.
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atoms, ions, and isotopes part 1 vocab: use the word - bank to answer t…
1. An atom is neutral; an ion has a charge due to electron gain or loss. 2. Composed of same sub - atomic particles and same element if proton number is the same. 3. Neutral Alumi…
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which type of bond holds atoms together in a water molecule? o dispersi…
B. covalent bond
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what element do all organic compounds have? o hydrogen o chlorine o sod…
carbon
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what does a process flow diagram for a chemical plant show? the molecul…
The flow of energy and matter through the system
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what does a process flow diagram for a chemical plant show? the color o…
C. The flow of energy and matter
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a polysaccharide is a type of polymer. polymers are molecules made of m…
The third structure is the polysaccharide.
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12. what did all indicators have in common? 13. what was the purpose of…
12. They change color depending on pH. 13. To act as a control or to avoid interference from impurities. 14. Cannot be determined without more information.
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steroids are another type of lipid. steroids function as chemical messe…
Steroids have carbon atoms arranged in rings. Steroids help regulate growth in the body.
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a disaccharide is a carbohydrate made of two monosaccharides bonded tog…
Beets are a source of sucrose. Sucrose can be made in plant cells.
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rosa was looking for patterns to help predict the products of chemical …
$2LiCl + 3O_2$
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what else is produced during the combustion of propane, c₃h₈? c₃h₈ + 5o…
$H_2O$
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what else is produced when sodium carbonate decomposes? na2co3 → na2o +
$CO_2$
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luis is helping his parents paint a border around the walls of a room. …
synthesis
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monosaccharides are the building blocks of carbohydrates. they may be f…
| | glucose | fructose | galactose | |--|--|--|--| | has 12 hydrogen and 6 oxygen atoms | √ | √ | √ | | is a monosaccharide | √ | √ | √ | | has a 6 - atom ring | √ | × | √ |
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which clue can be used to identify a chemical reaction as a replacement…
The reaction has two reactants with ions that seem to switch places.
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when explaining chemical reactions to a friend, brianna models a reacti…
synthesis
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what else is produced during the combustion of butane, c4h10? 2c4h10 + …
Carbon dioxide (\(CO_{2}\)) and water (\(H_{2}O\))
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what else is produced during the combustion of butane, c₄h₁₀? 2c₄h₁₀ + …
Nothing else is produced.
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what is the formula for phosphorus pentabromide? pbbr₅ pbr₅ p₂br₅ kbr₅
B. PBr₅
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what else is produced during the combustion of butane, c₄h₁₀? 2c₄h₁₀ + …
No other substances are produced.
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what is the formula for dioxygen difluoride? of o₂f o₂f₂ of₂
$O_2F_2$
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which clue can be used to identify a chemical reaction as a combustion …
A. A hydrocarbon reacts with oxygen.
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which type of reaction is nacl + agno3 → nano3 + agcl? synthesis decomp…
replacement
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what is the formula for bromine trifluoride? 3brf bf₃ brf₃ bfr₃
BrF₃
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a chemical reaction that has the general formula of na→(a)n is best cla…
polymerization
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covalent formulas what is the formula for sulfur trioxide? so so₂ so₃ h…
$SO_3$
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what is the formula for carbon tetrachloride? cacl4 clc4 ccl4 ccln
C. $CCl_4$
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____ is water that arises as a byproduct of chemical reactions that rel…
C. Metabolic water
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fill in the blank question as blood glucose levels fall, stored molecul…
glycogen
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water is considered a polar molecule because: o a it has oppositely cha…
1. a. It has oppositely charged regions due to unequal charge distribution 2. c. Water 3. c. Attraction between water and other substances
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question 11 air density is 1.29 kg/m³ at sea - level and comprises 23% …
(a) The mass of O₂ inhaled each day is 2.56 kg (rounded to two - decimal places). (b) The number of O₂ molecules is $4.82\times10^{25}$ molecules (rounded to two - decimal places).
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substance,element 1 symbol; metal/nonmetal,element 2 symbol; metal/nonm…
| Substance | Element 1 Symbol; Metal/Nonmetal | Element 2 Symbol; Metal/Nonmetal | Ionic/Covalent | Chemical Name | | ---- | ---- | ---- | ---- | ---- | | $Al_2O_3$ | $Al$; metal…
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what is the name of the compound ccl4? calcium pentachloride carbon tri…
carbon tetrachloride
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what is the name of the compound c3h6? tricarbon hexahydroxide exacarbo…
tricarbon hexahydride
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what is the name of the compound sbr2? disulfur bromide sulfur dibromid…
sulfur dibromide
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what is the name of the compound c4n3? carbon trinitride tetracarbon tr…
tetracarbon trinitride
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select all that apply which of the following statements about metabolic…
It contributes to fluid balance, It is a byproduct of chemical reactions in the body
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what is the name of the compound n2o3? nitrogen trioxide nitrogen oxide…
dinitrogen trioxide
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physical change burning toast * 1 point chemical change physical change…
For "burning toast": chemical change For "melting ice cream": physical change
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cream being whipped * chemical change physical change freezing chocolat…
1. B. physical change 2. B. physical change 3. A. chemical change
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pouring milk on cereal * chemical change physical change burning leaves…
1. B. physical change 2. A. chemical change 3. B. physical change
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fireworks exploding * chemical change physical change squeezing oranges…
1. chemical change 2. physical change 3. chemical change
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mowing the lawn * chemical change physical change corroding metal * che…
1. mowing the lawn: physical change 2. corroding metal: chemical change 3. bleaching your hair: chemical change
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what is the name of the compound n2o3? nitrogen trioxide nitrogen oxide…
dinitrogen trioxide
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5. draw examples of atoms in the space on the left, and compounds on th…
For atoms: Draw simple circles with element symbols (e.g., 'H' for hydrogen atom). For compounds: Represent atoms that make up the compound (e.g., $H_2O$ as two H and one O). For …
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question 5 (5 points) listen which of the following is not human - caus…
Question 5: D. Water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. Question 6: B. Caves and sinkholes
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question 3 (5 points) listen all of the following are examples of organ…
Question 3: B. water Question 4: A. Acid from abandoned mines, B. Water from a sewage treatment plant
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graded quiz: surface processes on earth 0:00:58 elapsed question 1 (5 p…
Question 1: C. haloclasty Question 2: C. nitrates
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isotopes and average atomic mass worksheet determine the weighted avera…
| Element | Average Atomic Mass | |--|--| | Iodine (I) | 126.86 | | Gold (Au) | 197 | | Carbon (C) | 12.04 | | Iron (Fe) | 55.85 | | Hydrogen (H) | 1.012 | | Nitrogen (N) | 14.03 …
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directions: label the following reactions as synthesis (s), decompositi…
1. D, 2NaCl → 2Na + Cl₂ 2. S, 2Na + Cl₂ → 2NaCl 3. C, C₂H₄ + 3O₂ → 2CO₂ + 2H₂O 4. D, 2H₂O → 2H₂ + O₂ 5. S, 2H₂ + O₂ → 2H₂O 6. C, 2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O 7. DR, B, NaOH + HCl…
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question 24 1 pts how many particles are in 78.9g of mgbr₂? a. 4.75x10²…
D. $2.58\times 10^{23}$ particles
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give each group a title (what do they have in common?) chapter 3: matte…
Group 1: Graph and Variable Concepts Group 2: Physical Properties of Matter Group 4: Classification and Composition of Matter
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instructions many federal and state agencies regulate the beauty and we…
1. **Step 1: Research Federal and State Agencies** - Use government websites, industry publications, and regulatory databases to find all relevant federal and state agencies that …
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question 22 1 pts the half - life of an isotope is 1.4 years. if there …
100g
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question 8 energy is stored in food as the potential energy of the elec…
Approximately 0.14 glasses.
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this is a timed test. you will get to use your chemistry ref. tables, a…
True
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question 19 1 pts the following is an example of fusion. $_{85}^{216}at…
False
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when a chemical bond is broken, ______ is released. o energy o the cofa…
energy
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this is a timed test. you will get to use your chemistry ref. tables, a…
8
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where is chemical energy held within a molecule? ○ within the atomic nu…
Within chemical bonds
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which represent 2 different isotopes of the same element? a. carbon - 1…
C. Carbon - 13 & \(^{12}_{6}C\)
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fill in the blank question a series of chemical reactions called blank …
metabolic
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a balloon contains 5.42x10^23 atoms of argon gas. calculate the mass in…
B. 36.0 grams Ar
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perform the calculation. 25.0 psi × 175.6 k ÷ 87.8 k write your answer …
$50$ psi
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multiply the measurements. 0.789 g/ml × 27 ml write your answer with th…
21
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multiply the measurements. 0.789 g/ml × 27 ml write your answer with th…
21
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to \catalyze\ means to speed up. o true o false need help? review these…
True
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calculate the number of atoms in 2.31mol titanium. a 1.39x10^24 b. 3.84…
C. $1.39\times 10^{24}$
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aluminum selenide formula unit:______ rubidium fluoride formula unit:__…
Aluminum selenide: $Al_2Se_3$ Rubidium fluoride: RbF Sodium bromide: NaBr Strontium oxide: SrO Cesium phosphide: $Cs_3P$
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how may moles of magnesium are in 524g mg? a 21.6 moles mg b. 12738 mol…
A. 21.6 moles Mg
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multiply the measurements. 0.933 mol/l × 1.550 l write your answer with…
$1.45$
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multiple choice question what does the term catalyze mean? activate spe…
B. Speed up
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how many moles of copper contain 5.67×10²² atoms? a. 3.60×10³⁴ mols cu …
C. $9.42\times 10^{-2}$ moles Cu
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3.7 practice c - lewis structures of compounds name: becca g. part 1 - …
lithium nitride: Li₃N aluminum oxide: Al₂O₃ potassium phosphide: K₃P strontium chloride: SrCl₂ potassium sulfide: K₂S
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select all that apply which of these occur during a hydrolysis reaction…
A large molecule is broken down, A water molecule splits
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perform the calculation. 4,250 ml × 340.2 k ÷ 260.1 k write your answer…
5560 mL
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which type of catabolic reaction involves the addition of a water molec…
B. hydrolysis
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1. classify each of the following as a suspension, colloid, or solution…
a) Suspension. Explanation: Particles settle out and initially pass through filter. b) Colloid. Explanation: Small particles visible under microscope and scatters light. c) Colloi…
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fill in the blank question the figure, when read from left to right, re…
dehydration
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1. classify each of the following as a suspension, colloid, or solution…
a) Solution. Explanation: Passes through filter completely, indicating small - sized particles like in a solution. b) Suspension. Explanation: Small particles settle out over time…
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this is a timed test. you will get to use your chemistry ref. tables, a…
1. 56.4g/mol
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question 17 (5 points) why is open pit mining so devastating to the env…
D. It completely removes any available topsoil.
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which best describes what occurs in a dehydration reaction? a water mol…
A. A water molecule is removed from a molecule when it creates a covalent bond.
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module 1 test intro: (3 pts) regarding the atom, an electron displays a…
electron: Negative, proton: Positive, neutron: Neutral