化学
化学反応、化学量論、分子構造、元素の性質。
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question 2 of 30 which type of scientist would most likely study how el…
C. A physicist
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student-response activity 1 wendy wants to find out if a substance is a…
1. Use litmus paper and a pH - meter. 2. Protons and neutrons are in the nucleus, electrons are in the electron cloud. 3. Saltwater has dissolved salts (ions) while distilled wate…
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case 5. diatomic molecules several common non - metal elements have bas…
1. Diatomic elements: Hydrogen ($H_2$), Oxygen ($O_2$), Nitrogen ($N_2$), Fluorine ($F_2$), Chlorine ($Cl_2$), Bromine ($Br_2$), Iodine ($I_2$) 2. Gases in air: Nitrogen ($N_2$), …
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reinforcement: the chemistry of life 1. neutral subatomic particles fou…
1. Neutrons 2. Protons 3. Electrons 4. Ionic 5. Covalent 6. Elements 7. Compounds 8. Van der Waals 9. Enzyme 10. Organic 11. Macromolecules 12. Cohesion 13. Adhesion 14. Organic 1…
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what is the total atom in the equation below? kbr
2
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activity b: temperature and molecular motion get the gizmo ready: - cli…
1. At 10 °C, water - molecules move relatively slowly and are close together. At 100 °C, water - molecules move much faster and are more spread out. 2. (A) The average speed of th…
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1. use the frayer model to define \isotopes\. click the image for an ed…
| Definition | Facts/Characteristics | |--|--| | Atoms of the same element with same number of protons but different number of neutrons | Same atomic number, different mass number…
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molecular (covalent) compounds when non - metal atoms share electrons w…
Define a binary compound: A compound composed of two different elements. $N_2O_4$: Dinitrogen tetroxide $PCl_5$: Phosphorus pentachloride $SO_2$: Sulfur dioxide $SO_3$: Sulfur tri…
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case 3. ionic compounds with polyatomic ions. cases 1 and 2 above invol…
$(NH_4)_2O$: ammonium oxide $FeC_2O_4$: iron(II) oxalate $CuNO_2$: copper(I) nitrite $Zn_3(PO_4)_2$: zinc phosphate $Sn(NO_2)_2$: tin(II) nitrite $Na_2SO_3$: sodium sulfite $Ca(HS…
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select all that apply choose the three major sources of carbon dioxide …
Respiration of marine organisms, Oxidation of organic matter, Transfer from the atmosphere
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a molecule made up of smaller subunits is called a monomer nucleotide m…
D. polymer
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15/25 which of the following is true? monomers bind together to form po…
Monomers bind together to form polymers.
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what is the total atom in the equation below? co₂
3
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go online to explore and explain the thermodynamics of a reaction in a …
"Water flows down rivers and through hydroelectric dams, doing work such as eroding river banks or generating electricity." and "You can see evidence that the hammer has energy wh…
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fill in the blank question from left to right, this equation describes …
dissolves
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4. you can often ____________ the parts of a mixture back into their or…
4. D. separate 5. C. orange dreamsicle
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3. the substance that does the dissolving is called the _____________. …
C. solvent
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multiple choice question the equation shown here represents the dissolu…
They indicate that the reactions can move in either direction.
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case 2. ionic compounds: transition metal + non - metal in general, it …
AgCl: silver chloride $FeBr_3$: iron (III) bromide, ferric bromide $Cu_3N$: copper (I) nitride, cuprous nitride $Cr_2S_3$: chromium (III) sulfide, chromic sulfide chromium (III) o…
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matching question match the ph concentration to the correct term. instr…
pH equal to 7 - Neutral pH greater than 7 - Basic or alkaline pH less than 7 - Acidic
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ordering question click and drag on elements in order describe what hap…
1. Carbon dioxide dissolves in seawater. 2. $CO_2$ combines with $H_2O$ to form $H_2CO_3$ (carbonic acid). 3. $H_2CO_3$ dissociates into $HCO_3^-$ (bicarbonate) and $H^+$ or into …
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question 8 determine the separation techniques youd need to use to sepa…
| | Step 1: Styrofoam beads | Step 2: Sand | Step 3: Magnesium sulfate | |--|--|--|--| | Separation technique required | Decantation | Filtration | Evaporation | | Explanation | F…
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multiple choice question what is a buffer? a physical barrier to the mo…
A substance that prevents drastic changes in the pH of a solution
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of the liquids listed below, which has the most neutral ph? ammonia pur…
Pure water
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fill in the blank question the scale represents the acidity or alkalini…
pH
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fill in the blank question a solution with a ph less than 7 is said to …
acidic
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multiple choice question how are the concentrations of h+ and oh- ions …
They are inversely proportional.
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the law of conservation of energy no matter what experiments you do in …
Chemical energy in logs = Heat energy + Light energy+ Sound energy
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multiple choice question water solutions contain ______. o both h₂o mol…
A. both $H_2O$ molecules and $H^+$ and $OH^-$ ions
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name: date: student exploration: phase changes vocabulary: altitude, bo…
(Prior Knowledge Question) No, the egg will not be done faster. Once water reaches its boiling - point (100°C at standard atmospheric pressure), its temperature remains constant d…
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student exploration: phase changes vocabulary: altitude, boil, boiling …
- Prior Knowledge Question: No, the egg will not be done faster. Once water boils, its temperature stays at the boiling - point (100°C at standard pressure) and additional heat ju…
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inorganic nomenclature ~ naming inorganic compounds every compound has …
barium ion: $Ba^{2+}$ aluminum ion: $Al^{3+}$ potassium ion: $K^{+}$ radium ion: $Ra^{2+}$ bromide: $Br^{-}$ nitride: $N^{3 -}$ iodide: $I^{-}$ oxide: $O^{2 -}$ sulfide: $S^{2 -}$…
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27) what is the name of hi? a) hydroiodous acid b) hydroiodic acid c) i…
27) C. hydroiodic acid 28) D. Nitrous acid 29) A. 101.10 amu 30) E. $SO_2$
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a food company hydrogenated a barrel of fat. the treatment ... (a) made…
A. made the fat less fluid
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20) what is the formula for an ionic compound made of carbon and oxygen…
20) E. Carbon and oxygen do not form an ionic compound. 21) B. beryllium chloride 22) B. Cobalt(II) sulfide 23) B. Sodium oxide 24) C. $PO_4^{3 - }$ 25) A. sulfur pentafluoride 26…
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true or false question water solutions contain only h₂o molecules. o tr…
False
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multiple choice question how are concentrations of oxygen in seawater m…
By using a probe that sends an electronic signal back to a receiver on a ship or buoy
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13) how many total atoms are in the formula al2(co3)3? a) 14 b) 8 c) 9 …
13) A. 14 14) B. $Ca = 3,P = 2,O = 8$ 15) A. $P_4O_{10}$ 16) D. Neon 17) A. molecular element 18) D. neon 19) C. $Ba_3N_2$
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11. two students designed the experiment shown below to study stream er…
11. By increasing the tilt of the tray 13. Physical Weathering
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14. changes within the rock’s minerals that break down bonds holding th…
14. Chemical Weathering 10. Water erosion
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1. wind can cause erosion that changes the surface of the earth. wind e…
1. Sand dunes and arches 2. Erosion caused by gravity 3. Gradually breaking down the rock into smaller pieces
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13) how many total atoms are in the formula al2(co3)3? a) 14 b) 8 c) 9 …
13) A. 14 14) B. $Ca = 3,P = 2,O = 8$ 15) A. $P_4O_{10}$ 16) D. Neon 17) B. molecular element 18) C. chlorine 19) C. $Ba_3N_2$
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chapter 5 assignment molecules and compounds mariana salano 9172125 tru…
1) F 2) T 3) F 4) T 5) T 6) T 7) F 8) F 9) F 10) F 11) D. Law of Constant Composition 12) B. 1.0
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multiple choice question what is the term used to describe the maximum …
B. Saturation concentration
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question 8 1 pts which of the following combinations of atoms would for…
$Na^+$ and $Cl^-$
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the highlighted part of this molecule is derived from... guaiacol. chol…
glycerol.
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question 6 1 pts sodium chloride (table salt) is formed when positively…
A. ionic bond
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question 5 1 pts individual water molecules orient toward each other be…
C. hydrogen
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question 4 1 pts in a covalent bond, atoms share electrons. lose water.…
share electrons.
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which of the following solutions has the highest concentration of free …
pH 1
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question 1 2 pts match the type of bond associated with each descriptio…
1. hydrogen 2. ionic 3. covalent 4. covalent 5. hydrogen
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what are the horizontal rows on the periodic table called? levels perio…
What are the horizontal rows on the periodic table called? B. Periods Question 8 (1 point) True
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question 1 2 pts match the type of bond associated with each descriptio…
1. hydrogen 2. ionic 3. covalent 4. covalent 5. hydrogen
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metalloids have properties of both metals and nonmetals. true false que…
1. True 2. D. Group 18
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what are the vertical (up and down) columns on the periodic table calle…
1. C. Groups or families 2. B. Oxygen
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flotation a technique used to separate a substance that floats on anoth…
Place the distillate in a container and let it stand until the eucalyptus oil floats on top of the water due to its lower density. Then, either skim off the eucalyptus oil layer o…
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which of the images shown below illustrates both hydrogen bonds and cov…
The third image
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mercury, a chemical element formerly used in most thermometers, freezes…
below 0°F
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question 4 1 pts how many hydrogen atoms are in a molecule of c8h10n4o2…
10
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the freezing point of pure water is 0°c, but adding salt to water chang…
colder than pure water's freezing point
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question 3 1 pts polar covalent bonds form when atoms of two molecules …
Electrons are shared unequally between atoms
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based on the carbon atom pictured in the image below, how many valence …
4
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elements are grouped in the periodic table by similar properties. true …
1. True 2. On the left
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looking at the image in question 1, how would you classify group 1 elem…
For the first question: Metals For the second question: They are very reactive
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what is the name of this family of elements? * 1 point group 1 li be na…
Alkali metals
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if the wrong word is used below, change it. if there is no error, click…
they're
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7. motion at high speeds diagnostic questions which of the following st…
A. length expansion (Note: It should be length contraction actually, but among the given options, this is the closest related concept)
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7. motion at high speeds before you move on, here are a few questions t…
C. the same width as when he is at rest.
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when you add a base to an acidic solution, what happens to the solution…
The pH increases. The solution becomes less acidic.
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select the correct answer. summer is a chemistry student who creates no…
B. Word Completion
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1. what is one key similarity between daltons and democrituss theories?…
1. Both proposed the existence of atoms as fundamental particles of matter. 2. Democritus' idea was philosophical; Dalton's was based on scientific experiments.
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based on what youve learned about what happens when water freezes, whic…
Salt disrupts the crystal lattice by getting between the water molecules. Since salt is polar, it dissolves in water and disrupts hydrogen bonding.
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what you know the metric system 1. identify how many places you would n…
A: 3 (move decimal 3 places left) B: 4 (move decimal 4 places right) C: 6 (move decimal 6 places left)
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astrobiologists (scientists who study the possibility of life in the un…
Silicon, Si, atomic number 14 with four valence electrons
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which is the best example of how one form of pollution affects another?…
The use of pesticides on plants causes air and water pollution.
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3.6. predict whether a solution has a high or low concentration of free…
False
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a local crime lab is offering training sessions for law enforcement in …
In this seminar, we will learn about blood spatter patterns and how those differ on different wall surfaces.
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match the name of the monomer to the chemical formula. drag each item o…
$NH_2CH_2COOH$: amino acid $C_5H_5N_5O$ (with phosphate and sugar structure): nucleotide $C_6H_{12}O_6$: simple sugar
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egg whites solidify in the presence of acids. would lemon juice (ph 2.3…
Lemon juice, because it donates more H⁺ ions than orange juice.
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that life on other planets could be based on an element other than carb…
Elements with the ability to form multiple stable covalent bonds, create complex molecular structures, and participate in diverse life - relevant chemical reactions.
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what type of bonds are the bonds between simple sugar molecules in a ca…
covalent
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3.1 compare and contrast the types of bonds that form molecules. order …
1. Ionic 2. Covalent 3. Hydrogen
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which of the following are hydrophilic? hydrophilic ions nacl nonpolar …
ions, NaCl, polar molecules
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match the following types of bonds to the correct image. hydrogen* ioni…
Hydrogen: First image, Ionic: Third image, Covalent: Second image
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water molecules form hydrogen bonds with which of the following types o…
hydrophilic molecules like sugar, polar molecules like ammonia
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match the type of bond to its description. drag each item on the left t…
covalent - atoms that share electrons ionic - attraction of a negatively charged atom or molecule with a positively charged one hydrogen - a partially positively charged hydrogen …
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which of the following compounds are organic? organic carbohydrate prot…
Organic: carbohydrate, protein Inorganic: water, nitrogen gas
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for each of the noted items on the ph scale, match the label that indic…
- Milk (pH = 6.5, roughly close to pH = 6) is roughly 10 times more acidic than water. - Natural rainwater (pH = 5.6, roughly close to pH = 6) is roughly 10 times more acidic than…
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1. nombra los siguientes hidróxidos según la nomenclatura clásica. a) c…
A. Cobre (II) hidróxido B. Hierro (II) hidróxido C. Estano (IV) hidróxido D. Níquel (II) hidróxido
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identifying technologys effect how has technology affected the curiosit…
Scientists have moved the rover about 5 kilometers since landing on the planet in 2012. Curiosity drilled samples from the floor of an ancient lakebed. Curiosity's instruments fou…
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2) 0.0958 g of a compound (molar mass = 312 g/mol) are burned in oxygen…
Empirical formula: C₃H₇O, Molecular formula: C₁₈H₄₂O₆
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what is the simplified molecular formula for all carbohydrates? c₆h₁₂o₆…
$CH_2O$
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5. mary works for a chemistry laboratory and her boss tells her that sh…
The element is selenium (Se). To find it, first, note that the 4 shells mean it's in the 4th period. Then, since it has 6 valence electrons, it's in group 16. Looking at the inter…
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obtenemos hidróxido de magnesio. 1. corta una cinta de magnesio y acérc…
# Explanation: ## Paso 1: Analizar la reacción química La reacción entre la ceniza (probablemente compuestos de oxígeno y magnesio) y el agua puede ser una reacción de disolución …
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3. given the following ions, determine the number of protons, electrons…
a. Cu²⁺: Protons = 29, Electrons = 27, Type of ion = Cation b. Te²⁻: Protons = 52, Electrons = 54, Type of ion = Anion For Argon, draw a nucleus with 18 protons and three electron…
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what document will inform you about the hazards of the materials and ch…
A. Safety Data Sheets (SDS)
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vaporization condensation melting sublimation deposition freezing occur…
Exothermic: condensation, deposition, freezing Endothermic: vaporization, sublimation, melting
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using this diagram for support, why is energy required to move from the…
The reactant bonds require energy to break, and very little energy is released when the unstable transition state bonds form.
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when atoms with similar levels of electronegativity share electrons, th…
nonpolar covalent
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what is the activation energy, $e_a$, for this reaction? 90 j 50 j 80 j…
50 J