化學
化學反應、化學計量、分子結構與元素性質。
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vitamins are inorganic elements like copper whereas minerals are comple…
False
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question 29 a struggle or clash that drives the plot is known as? confl…
Question 29: A. conflict Question 30: A. A poem consisting of 14 lines (iambic pentameter) with a particular rhyming scheme
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34 what type of electrons orbitals are dumbbell shaped? * (0.5 points) …
p - orbitals
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30 which of the following orbital notations for phosphorus is correct? …
C
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29 explain the aufbau principle. * (0.5 points) electrons occupy equal …
Electrons are added one at a time to the lowest energy orbitals available until all the electrons of the atom have been accounted for.
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28 what is the maximum number of electrons that can occupy an f - shell…
14 (C. 14)
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27 using the electron configuration, determine the highest occupied ene…
5
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26 what element has the following ground state electron configuration? …
Aluminum
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what principle is the following orbital diagram violating? * (0.5 point…
C. Hund's Rule
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23 what is the correct electron configuration for a ground - state atom…
A. 1s²2s²2p³
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7. a sample of copper with a mass of 63.5 g contains 6.02 x 10^{23} ato…
$1.055\times 10^{-22}$ g
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21 what is the noble gas configuration for oxygen? * (0.5 points) a 1s²…
D. $1s^{2}2s^{2}2p^{4}$
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3. nonmetals are located right side + hydrogen conductors not or
poor; shiny
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19 what is the atomic number of the element with the noble - gas notati…
37 (corresponds to option C if the options are numbered as C. 37 in the multiple - choice context)
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10. prepare a 0.5m solution of nacl in 100 ml of di water (molar mass o…
We will calculate the mass of NaCl required for each volume separately. **For 100 mL solution**: 1. First, convert the volume to liters: - The volume \(V = 100\ mL=0.1\ L\). - The…
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15 using the electron configuration, determine the total number of elec…
$41$
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14 what does the letter “n” represent in chemistry? * (0.5 points) plan…
energy level
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13 what principle is the following orbital diagram violating? * (0.5 po…
D. Hund's Rule
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12 using the electron configuration, determine how many electrons are i…
2
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what is hunds rule? * (0.5 points) electrons are added one at a time to…
Electrons occupy equal-energy orbitals so that a maximum number of unpaired electrons results.
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10 what does the pauli exclusion principle state? * (0.5 points) electr…
An orbital can hold a maximum of 2 electrons. To occupy the same orbital, 2 electrons must spin in opposite directions.
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9 which of the following best describes the shape of an s - orbital? * …
Spherical
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8 what principle is the following orbital diagram violating? * (0.5 poi…
B. Hund's Rule
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what is the correct noble - gas notation for the electron configuration…
D. $[Ne]3s^{2}3p^{5}$
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6 what element has this ground state electron configuration? * (0.5 poi…
Nb (Niobium)
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5 what is the highest occupied energy level in an atom of strontium in …
n=5
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in orbital notation, explain why we use up and down arrows. * (0.5 poin…
The arrows represent the spin of the electrons. They must have opposite spins to occupy the same orbital.
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1 what is the noble gas configuration for zinc? * (0.5 points) a ar4s²4…
C. [Ar]4s²3d¹⁰
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solutions and molarity 1. find the mass to prepare a 3.0% solution of s…
0.9 g
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6. what is the range of the radii of most atoms in nanometers (nm)? 5×1…
6. The range of the radii of most atoms in nanometers is \(5\times 10^{-2}\text{ nm}-0.2\text{ nm}\). 7. The mass of a single copper atom is approximately \(1.05\times 10^{-22}\te…
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question 36 (1 point) compounds that contain carbon and hydrogen bondin…
organic
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protons: 0 neutrons: 0 electrons: 0 sulfur
Protons: 16 Neutrons: 19 Electrons: 18
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skills assessment review answer the following questions pertaining to t…
1. C. Gait 2. B. Hypoglycemia 3. A. Given within 3 hours of symptom onset 4. C. Transient ischemic attack
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when a solution produces equal number of hydrogen and hydroxyl ions, it…
1. True 2. True
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atoms are the smallest particles of a compound that still retain the pr…
1. B. False 2. A. True
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column a 1. ___ type of kinetic energy represented when legs are moving…
1. f. mechanical energy 2. d. chemical energy 3. c. potential energy
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20. headaches caused by muscle contractions in the head and neck are ty…
20. D. tension headaches 21. A. hyperglycemia 22. B. airway 23. C. transient ischemic attack 24. C. AVPU
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choose the item in column two that best matches each item in column one…
1. e. Ionic bond 2. a. Polar covalent bond 3. c. Hydrogen bond
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2. a positively charged particle in an atom is the
proton
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true or false 1. atoms are mostly empty space. 2. each element has a sp…
1. T 2. T 3. F 4. F 5. F 6. F 7. T 8. F 9. F 10. F
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what is the missing coefficient to make a balanced equation? 4al + 3c →…
1
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what is the missing coefficient to make a balanced equation? 4al + ?c →…
3
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which of the following best describes the difference between a mixture …
B. A mixture can be easily separated, but a solution has substances that are evenly mixed and harder to separate.
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what is the missing coefficient to make a balanced equation? ?al + c → …
4
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5. explain how the law of definite proportions defines the composition …
5. A given compound always has elements in a fixed mass - to - mass ratio as per the law of definite proportions. 6. Compounds formed from the same elements are compared. They sha…
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1. what does the greek word for atoms mean? 2. the heavy particles of a…
1. Indivisible 2. In the nucleus 3. Empty space 4. Protons, neutrons 5. In electron - shells/orbitals around the nucleus 6. A very large number 7. The number of protons 8. The num…
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which of the following is a compound? a sodium chloride b hydrogen gas …
A. sodium chloride
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2. the ______ controls the most basic functions of the body, such as br…
2. A. brainstem 3. A. two 4. C. incontinence 5. C. an ischemic stroke 6. A. untreated hypertension 7. B. headache 8. B. dilate 9. D. 24 hours 10. A. should not be given anything b…
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the abundance of elements come from fusion reactions where atomic nucle…
1. \(H + He ightarrow Li\) 2. \(He + He ightarrow Be\) 3. \(Li + He ightarrow B\) 4. \(Ne + He ightarrow Mg\)
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when a pair of electrons is shared equally between two atoms, the bond …
A. non - polar covalent bond
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two groups test how temperature affects how quickly sugar dissolves. gr…
B. To increase confidence that the results are reliable
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8. what does the atomic number tell you about an element?
The number of protons in the nucleus of an atom of the element.
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when sodium reacts with chlorine... a sodium becomes a neutral atom. b …
D. Sodium donates an electron to chlorine and becomes a positively charged ion.
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what is the missing coefficient to make a balanced equation? 2kclo₃ → 2…
3
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what is the missing coefficient to make a balanced equation? 2kclo₃ → ?…
2
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7. what makes 1 atom different from another? __________
The number of protons in the nucleus.
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what is the missing coefficient to make a balanced equation? 2kclo₃ → ?…
2
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what is the missing coefficient to make a balanced equation? ?kclo₃ → k…
2
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q6. (s c.6.n.3.1) a scientist states that the law of conservation of ma…
Laws describe consistent patterns, and theories use evidence to explain why those patterns occur.
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how much fes would form if 5.6 grams of fe reacted with 3.2 grams of s?…
8.8 g
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how much cuo would form if 12.9 grams of cu reacts with 3.2 grams of o2…
$15.91\ g$
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hcl reacting with naoh is an exothermic reaction and the measured tempe…
More energy is released as bonds are formed than absorbed as bonds are broken.
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in a chemical reaction between hydrochloric acid (hcl) and sodium hydro…
exothermic
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9. what is the most accessible substance? (1 point) marijuana acid alco…
9. C. Alcohol 10. B. THC 11. D. All of the Above
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kcl dissolving is an endothermic reaction and the measured temperature …
More energy is absorbed by bonds broken than is released by bonds formed.
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in a chemical reaction between potassium chloride (kcl) and water, the …
endothermic
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what component of a chemical reaction is highlighted in red? 4fe(s) + 3…
plus
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what component of a chemical reaction is highlighted in red? 2h₂(g) + c…
coefficients
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what component of a chemical reaction is highlighted in red? 6co₂(g) + …
products
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column a 1. acid 2. adenosine triphosphate 3. base 4. chemical reaction…
1. h 2. a 3. i 4. f 5. j 6. d 7. g 8. c 9. b 10. e
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what does the rapid expansion and release of bubbles when hydrogen pero…
The reaction produces a gas.
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what does the decrease in temperature when baking soda is mixed with ci…
The reaction changes in energy.
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atomic theory development - timeline the timeline depicting the develop…
science is not absolute and theories can be revised.
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which of the following is true of iron? a. it has the highest electrica…
D
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q3. (sc.6.n.1.3 ) two scientists test how temperature affects sugar dis…
The investigation is replicable because both scientists got similar results
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true/false if you believe the statement to be more true than false, wri…
1. T 2. F 3. F 4. T 5. F 6. T 7. T 8. F 9. T 10. T 11. T 12. T
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32) would you normally expect (ne) to form compounds a. yes b. no c. so…
32) b. No 33) a. boron and aluminum 34) b. Protons are smaller than quarks
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use the shell model to answer the next question shell model 30) which e…
30) D. Sodium 31) b. 8 electrons
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based on the table which element most likely has physical and chemical …
1. b. Aluminum (Al) 2. d. Does not react 3. a. nucleus 4. a. Group 1
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24) which ion will have an overall charge of 1+ a. lithium b. fluorine …
24) a. lithium 25) b. fluorine
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20) which of the following elements would most likely be a shiny, gray …
20) a. aluminum 21) d. They have different mass and different electrical charge 22) c. orbitals 23) a. lithium
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15) ionization refers to the process of a. changing from one period to …
15) B. Losing or gaining electrons 16) C. metalloids 17) A. They are located in the left most column of the periodic table 18) B. silicon 19) C. Unlikely to combine with other ele…
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the three main groups of elements are metals, non - metals, and 10) a. …
11) a. metals 12) a. brittle 13) c. It has one valence electron on its outer shell 14) a. Atomic number
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find the element: is it: neutral atom
Helium (He)
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5) magnesium (mg) is located to the right of sodium (na) because mg has…
5. d. More protons 6. a. Become less metallic 7. b. A group 8. c. ions 9. b. -1 ions
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choose the best answer for each answer and put the letter on the line n…
1) a. The number of protons in the nucleus 2) c. Valence electrons 3) d. sodium 4) b. On the right side
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find the element: is it: neutral atom ion
The element is Hydrogen (H) and it is a Neutral Atom.
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what is the volume of 80.0 g of ether if the density of ether is 0.70 g…
$1.1\times 10^{2}$
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3. why cant carbon - 14 dating be used to determine the age of very anc…
3. B. Its half - life is too short for rocks older than 50,000 years 4. B. Tracking mass - dependent fractionation processes 5. C. Mass - dependent processes 6. B. Periods of sign…
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1. which of the following best describes why different isotopes of the …
1. B. Variations in neutron count 2. B. The time required for half of the parent isotope to decay into daughter isotopes 3. B. Its half - life is too short for rocks older than 50…
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17 multiple choice 1 point what is the process that changes one set of …
B. chemical reaction
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5. record the following parameters during the process: name each materi…
Weight of ball: $0.0890666\ lbf$ Specific weight of foam: $8.67\ lbf/ft^{3}$ Density of foam: $0.000235\ g/mm^{3}$
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compound,formula,atoms of carbon,atoms of hydrogen,atoms of oxygen,tota…
| Compound | Formula | Atoms of Carbon | Atoms of Hydrogen | Atoms of Oxygen | Total Number of Atoms | |--|--|--|--|--|--| | ethanol | $C_2H_5OH$ | 2 | 6 | 1 | 9 | | methanol | $C…
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8. fill in the following table that includes information on isotopes: i…
| Isotope symbol | Isotope Name | Atomic number | Atomic mass | # of protons | # of neutrons | # of electrons in neutral atom | |---|---|---|---|---|---|---| | $^{12}_{6}C$ | Carb…
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4. the most important consideration in caring for a patient who has bee…
4. A. maintain the airway 5. A. Patient age 6. C. Injected poisons are absorbed over time. 7. C. constipation 8. B. slows reflexes 9. C. Ativan 10. D. Induce vomiting. 11. A. para…
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7 multiple choice 1 point identify the molecule in the diagram above: a…
D. glucose (monosaccharide)
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practice: atomic calculations part 1 atomic structure 1. draw five prot…
1. Draw 5 protons in the nucleus and label +1. 2. Draw 6 neutrons in the nucleus and label 0. 3. Draw 2 electrons in the first energy - level and 3 in the second and label -1. 4. …
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what is a social consequence of organic farming? organic farmers face l…
Organic produce is not equally affordable to all people.
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how does the usda banning biodegradable plastic containing petroleum se…
This ends up making organic farmers think the government favors conventional farmers over them.
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in what way is converting a natural area into an organic farm just as b…
A. Either way, there is a loss of biodiversity with both conversions.