化学
化学反应、化学计量、分子结构与元素性质。
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4. synthesize information the noble gases in group 18 were some of the …
Noble gases are inert with full - valence shells, present in low atmospheric concentrations, and do not react easily, thus were among the last to be discovered.
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use figure 4 to answer question 3. 3. interpret tables what element is …
The element is chromium (Cr). It is more similar to tungsten because elements in the same group of the periodic table have similar chemical properties, and chromium and tungsten a…
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2. construct explanations assume that one particular atom of rhodium (r…
The atomic mass on the periodic table is a weighted - average of all isotopes of rhodium, while 102 is likely the mass of a single isotope.
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state the appropriate disposal route of the following: used organic sol…
used organic solvents: 3. hazardous waste through science stores very diluted acid: 4. down the sink remnants from lunch: 6. garbage container outside the lab used batteries: 1. s…
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question 15 (1 point) saved considerations for working under a chemical…
- Ensure chemical containers are stored at the back of the fumehood - Work at least six inches inside the fumehood - Declutter the fumehood to create a safe working space
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2. observe: turn off show current formula/equation. drag a water molecu…
2. Without performing the action, it could be that the water molecule interacts with other substances in the building region, such as hydrating ions or participating in a chemical…
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modeling ionic and covalent bonds 1 in each box, enter the appropriate …
Electrons (N): 5 Electrons (O): 6
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modeling ionic and covalent bonds in each box, enter the appropriate nu…
Electrons (N): 5 Electrons (O): 5
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activity a: build a glucose molecule get the gizmo ready: be sure the c…
A. 2 B. 1
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gizmo warm - up what do rice, potatoes, and sugar have in common? they …
1. C: 6, H: 12, O: 6 2. A. 24 B. The number of black spheres is equal to the total number of carbon, hydrogen and oxygen atoms in the chemical formula of glucose.
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question 4 which functional groups are found in these molecules? 1 poin…
carboxyl and amino
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question 1 which functional groups are found in these molecules?
hydroxyl and keto
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if the element magnesium (mg) has 12 electrons it will also have: 12 pr…
12 protons
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question 7 which of the following does not appear in a rate law? rate c…
coefficients from the balanced equation
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a unimolecular chemical reaction where the reaction rate is directly pr…
First
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question 5 if a reaction has a constant rate that is independent of rea…
zero
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question 4 how are values in a rate law determined? statistically algor…
C. experimentally
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the exponent in a rate law is called the reaction ____. energy multipli…
order
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question 1 the mathematical expression of rate for a given reaction is …
rate law
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3 tries left marlisa is a researcher who is studying brain mris of pati…
C. neuropsychology
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determine the formal charge of each atom in this lewis structure. then,…
Left nitrogen: 0 Right nitrogen: 0 Overall charge: 0
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in an electrically neutral atom, the number of protons equals the numbe…
protons equals the number of electrons.
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use the drop - down menus to describe the charges of the subatomic part…
Protons have a positive charge. Neutrons have a 0 charge. Electrons have a negative charge.
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label each bond in the following compound as ionic or covalent. select …
Part 1 of 2: Covalent Part 2 of 2: Covalent
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question 34 the sense of smell is also known as _______. olfaction chem…
olfaction
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question 10 points 2 which of the following materials is used to make g…
Silica
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question 21 sound waves are simply ________. ○ a form of electronic rad…
the vibration of the molecules of the air surrounding us
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case of dr. jekyll and mr. hyde: summary and plot development disease, …
The powders look like they were made by a professional chemist.
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the case of dr. jekyll and mr. hyde: summary and plot development disea…
The powders look rare and appear to be of the highest quality.
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organic compounds are compounds that contain carbon atoms, with only a …
contain carbon atoms, with only a few exceptions.
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inorganic compounds are compounds that are highly reactive and explosiv…
do not contain carbon atoms, with a few exceptions.
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ph is a measure of ______ concentration of oxygen and nitrogen ions in …
concentration of hydrogen and hydroxyl ions in a solution.
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psychological science uses research to study the mind, brain, and behav…
Brain: neurochemical processes, hormonal activity Mind: thought, cooperation, memory Behavior: mating
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a student sets up the following equation to solve a problem in solution…
mL
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which piece of evidence best supports the claim that sushi has a long h…
Sushi came about almost a thousand years ago in Japan.
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14 multiple choice 1 point do chemical reactions still occur without en…
Yes, the reaction happens but the reaction is slower.
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the passage below describes a process of scientific inquiry. select the…
After walking by some rusted cars parked in the street, Tessa wondered whether all metals are equally susceptible to corrosion.
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the concentration of a solution may be expressed by all of the followin…
D. pH
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work knowledge, and logic to match the below the definition. on the lin…
Thermal
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25 mn manganese 54.938 atomic # = atomic mass = mass number = # of prot…
# Explanation: ## Step1: Recall atomic number concept Atomic number is the number at the top of the element box. For Mn, it is 25; for K, it is 19; for F, it is 9. ## Step2: Recal…
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iodine 126.905 atomic # = atomic mass = mass number = # of protons = # …
**Iodine**: Atomic # = 53 Atomic Mass = 126.905 Mass Number = 127 # of Protons = 53 # of Neutrons = 74 # of Electrons = 53 **Argon**: Atomic # = 18 Atomic Mass = 39.948 Mass Numbe…
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16 s sulfur 32.06 atomic # = atomic mass = mass number = # of protons =…
Sulfur: Atomic # = 16 Atomic Mass = 32.06 Mass Number = 32 # of Protons = 16 # of Neutrons = 16 # of Electrons = 16 Magnesium: Atomic # = 12 Atomic Mass = 24.305 Mass Number = 24 …
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# of electrons = 35 5 b 10.81 atomic # = atomic mass = mass number = # …
Atomic # = 5 Atomic Mass = 10.81 Mass Number = 11 # of Protons = 5 # of Neutrons = 6 # of Electrons = 5
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atom a has an atomic number of 20 and mass number of 41. atom b has an …
Atom A has one more proton and one more electron than Atom B.
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question 19 this energy diagram shows the allowed energy levels of an e…
Ground state: E Number of lines in absorption spectrum: 6 Longest - wavelength transition: E to D Shortest - wavelength transition: E to C
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question 15 which of the following sets of quantum numbers is for the h…
Question 15: A. $n = 4,l = 3,m = 3$ Question 16: C. $n = 2,l = 0,m = 0$
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fill in the blank question a difference in chemical concentration, elec…
gradient
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the possible values for angular momentum quantum number, l, when n = 3 …
Question 12: c. 0, 1, 2 Question 13: a. 0 Question 14: c. 2
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which orbital is spherical in shape a.d b.p c.s d.f
C. s
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question 7 the impossible isotope is because a. $_1^1h$ b. $_{95}^{241}…
C. $_{9}^{4}Be$ because the atomic number and mass number are in the wrong positions and a mass number of 4 for beryllium is not possible.
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1 a) donnez le nom des groupes de mots entre crochets dans lextrait sui…
a) Groupes syntactiques (verbaux, adjectivaux, nominaux, etc.) b) Voir les noyaux de chaque groupe (par exemple, "poignée" dans "Une poignée de passionnés") c) Voir les éléments q…
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duncan v. louisiana: the ruling the supreme courts decision the supreme…
The Sixth Amendment can be incorporated; Duncan's conviction was overturned.
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2 dans les phrases suivantes, chaque mot en gras est le noyau dun group…
1) [Notre galaxie, la Voie lactée] est [un amas de milliards d'étoiles] (GN) (GN) 2) [Les savants de l'Antiquité] s'intéressaient déjà [à la Voie lactée] (GN) (Gprépo) 3) Ils voya…
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the number of electrons in the valence shell determine what types of bo…
True
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multiple choice question what causes dark adaptation? the chemical comp…
The chemical composition of the rods and cones changes as a result of the lighting changing.
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what is the name of the positively charged subatomic particle? multiple…
C. Proton
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certain ules\ of chemistry are used to simplify concepts when in fact s…
1. ion 2. isotope 3. atom 4. planetary 5. atomic
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select the single word in each sentence to make it correct. 1. in a cov…
1. nonpolar 2. sharing 3. charge 4. electrons 5. sharing
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classify the ph of each substance as acidic, neutral, or basic. labels …
Acidic: Milk, Lemon juice Neutral: Water Basic: Bleach, Oven cleaner, Egg white, Bread, coffee
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classify the ph of each substance as acidic, neutral, or basic. labels …
Egg white: Basic Milk: Acidic Wine: Acidic
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al₂(so₄)₃ express your answer in atomic mass units to two decimal place…
For $Al_2(SO_4)_3$, formula - mass = 342.17 amu For $(NH_4)_2Cr_2O_7$, formula - mass = 252.10 amu
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li₂o express your answer in atomic mass units to two decimal places. fo…
29.88 amu
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what is the main difference between robinsons \the man against the sky\…
D. "Mending Wall" has a strict rhyme scheme, while "The Man Against the Sky" does not.
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which statement best describes the rhyme schemes of the author to her b…
D. Bradstreet uses couplets for their overall rhyme scheme and structure, Wheatley uses couplets to enhance the poem as a song of praise for creation.
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gabriella stops into a convenience store to find a healthy snack and se…
check the bottle’s nutritional label to determine if all the ingredients are healthy
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what is the overall energy transformation in a coal - fired power plant…
chemical to electrical
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multiple choice question which of the following is made by joining two …
Molecule
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which is the smallest particle with a unique chemical identity? o molec…
D. Atom
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6 multiple choice 0.8 points which of the following is a particle found…
E. neutron
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during early research in nuclear energy, why were scientists surprised …
They expected that the large release of energy would cause an increase in mass.
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fill in the blank question the energy required to initiate or begin a c…
activation
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organic old - fashioned oats 1/2 cup 150 27 3 5 0 1 banana 1 small, 100…
# Breve explicación: La tabla muestra la cantidad de calorías, carbohidratos, grasas, proteínas, azúcares y grasas saturadas en diferentes alimentos para el desayuno y el almuerzo…
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multiple choice question which is a 20 - carbon compound derived from a…
A. Eicosanoids
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fill in the blank question fatty acids with multiple c=c bonds are call…
poly - unsaturated
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true or false question unsaturated fatty acids do not have double bonds…
False
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multiple choice question a fatty acid contains the maximum number of hy…
B. saturated
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12 an is the smallest particle of elements that maintains the propertie…
atom
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which subatomic particles are found in the nucleus of an atom? i. proto…
B. I and III only
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7. whose work is credited with being the beginning of modern atomic the…
John Dalton
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who was the first person to propose the existence of atoms? he hypothes…
B. Democritus
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true or false 4 points the massachusetts bay colony had a conflict with…
7. True 8. Effigy 9. Edwin Chadwick 10. All of the answer choices
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multiple choice question palmitic acid is an example of a(n) ______ fat…
A. saturated
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multiple choice question which are classifications of fatty acids? o ba…
B. Saturated and unsaturated
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multiple choice question sucrose is an example of a ______. o monosacch…
disaccharide
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multiple choice question which best describes what occurs in a condensa…
A. A water molecule is removed from a molecule when it creates a covalent bond.
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multiple choice question name the chemical reaction that breaks a coval…
Hydrolysis
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multiple choice question which molecule is most likely to contain methy…
C. Fats
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multiple choice question which type of molecule is most likely to have …
B. Alcohols
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multiple choice question starch is a ______ of glucose. o monomer o red…
C. polymer
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multiple choice question name the functional group with the symbol -nh₂…
B. Amino
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multiple choice question carboxyl and phosphate groups are examples of …
D. functional groups
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multiple choice question fats, steroids, and amino acids are molecules …
Methyl
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multiple choice question when a molecule accepts electrons, it is said …
reduced
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fill in the blank question the functional group commonly found in alcoh…
hydroxyl
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fill in the blank question an oxidation - reduction reaction is defined…
electrons
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multiple choice question which functional group is abbreviated -oh? o a…
B. Hydroxyl
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multiple choice question which molecule is reduced in an oxidation - re…
Oxidizing agent
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fill in the blank question groups of atoms that are added to carbon bac…
functional
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multiple choice question which term refers specifically to a type of re…
Reduction
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a chemical reaction in which a molecule gives up electrons is ________.…
B. oxidation