化学
化学反応、化学量論、分子構造、元素の性質。
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properties of nonmetals include a high boiling point. b ability to cond…
C. dull appearance
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which of the following is a nonmetal? a carbon b cesium c calcium d cop…
A. carbon
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the only nonmetal that is a liquid at room temperature is ________. ent…
Bromine
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examples of metals include a carbon. b phosphorus. c sulfur. d sodium
d. sodium
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which of the following are properties of nonmetals? select all that app…
B. dull and brittle C. relatively low boiling point D. poor conductors of heat
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which of the following statements are true about nonmetals? select all …
A. They can exist as solids, liquids, or gases B. They have a wide variety of properties, most of which are the opposite of metals.
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the necessity of solitude is deeper than we have said, and is organic. …
Regardless of how tightly bound communities may seem, each person is ultimately alone.
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a psalm of life by henry wadsworth longfellow what the heart of the you…
The poem adheres to a strict ABCB rhyme scheme, with no exceptions in stanzas.
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which of the following represents a property of metals? a high ionizati…
B. Shiny
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what is the rhyme scheme of \a psalm of life\? abbc aabb abba abab
D. ABAB
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read the passage. then answer the question. upcycling trash to treasure…
B. Upcycling helps keep plastic out of the ocean.
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read the passage. then answer the question. upcycling trash to treasure…
C. People think the fabric is comfortable and soft.
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which of the following is the atomic radius of chlorine if the internuc…
D. 100 pm
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arrange the following atoms in order of decreasing atomic radius: ga, a…
d. Sn, Sb, Te, Ga, As
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which of the following best explains why atomic radius decreases left t…
B. Protons are added to the nucleus, and the force of attraction on electrons is stronger
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in the periodic table, the element with the largest atomic radii is fou…
C. The lower left
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the atomic radius of a nitrogen atom is 71 pm. what is the distance bet…
C. 142 pm
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which of the following has the largest atomic radius among group 16 ele…
d. Po
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what will be the atomic radius of copper, if the distance between two a…
A. 128 pm
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____ has the smallest atomic radius. a tin. b germanium c silicon d lead
C. Silicon
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which of the following has the smallest atomic radius? a b. b ga c f d …
C. F
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which of the following halogens has the largest atomic radius? a fluori…
d. Iodine
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in this section, youll learn to use digital tools and identify how they…
C. Notion
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its been a few weeks since chloe downloaded the apps you recommended. s…
B. Focus@Will
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in this section, youll learn to use digital tools and identify how they…
Google Calendar
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14. arrange the following sets of elements in order of increasing atomi…
14a: Xe < Sn < Sr < Rb 14b: He < Kr < Xe < Rn 14c: Al < Pb < Ba < Cs 14d: F < Cl < Ar < I 15a: Na 15b: S 15c: N 15d: F 15e: Al
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13. in each of the following sets of atoms, which element would be expe…
a. Li b. Ca c. Cl d. S
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12. which elements on the periodic table lose electrons most easily (me…
Metals. Because metals have low ionization energies and fewer valence - electrons, making it easier for them to lose electrons to achieve a stable electron configuration.
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11. give some similarities that exist among the elements of group viia.
They all have 7 valence electrons, are highly reactive non - metals, form salts with metals, and exist as diatomic molecules in elemental form under standard conditions.
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8. how many valence electrons does each of the following atoms have? a.…
a. 1 b. 5 c. 3 d. 2 ### 9.
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7. to which element does each of the following abbreviated electron con…
Elements in Group VIIA have 7 valence electrons, are non - metals, have high electronegativities, and tend to gain an electron to form anions. ### Question 12
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6. write the complete orbital box diagrams for each of the following el…
For aluminum: 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓ 3s: ↑↓ 3p: ↑ For phosphorus: 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓ 3s: ↑↓ 3p: ↑ ↑ ↑ For bromine: 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓ 3s: ↑↓ 3p: ↑↓ ↑↓ ↑↓ 4s: ↑…
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is dehydration synthesis the way that monomers are joined to make polym…
Yes
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in addition to science courses like physics and chemistry, what other t…
B. computer science
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the dissolving agent in an aqueous solution called the a) solute b) sol…
B. solvent
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1. the number of sublevels in a principal energy level (increases or de…
1. Increases 2. 2 3. a. Si; b. Be; c. Ne; d. Cl; e. Mn 4. a. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}\); b. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}\); c. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s…
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what does the atomic number of an element represent? a) the number of p…
A. The number of protons in the atom
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19 what does the atomic mass of an element represent? a) the number of …
C. The weighted average of the masses of the element’s isotopes
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18. what is one way that “covalent bonds” and “ionic bonds” differ? a) …
B. Ionic bonds involve transferring electrons; covalent involve sharing electrons
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17. which of these statements about electrons is true? a) electrons are…
C. Electrons are about 1/1840 as massive as protons
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the gas - phase reaction 2o3(g) → 3o2(g) has been studied in a closed r…
Using a larger reaction container, but the same initial amount of O₃(g).
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instructions: fill in the table below with the appropriate intermolecul…
1. Ion - dipole 2. London dispersion forces 3. Hydrogen bonding 4. Dipole - dipole
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15. an atom has 12 protons in its nucleus. what does this number repres…
B. The atomic number of the atom
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when a perfume bottle is opened, some liquid changes to gas and the fra…
A. Gases do not have a definite volume.
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(d) complete the dot - and - cross diagram to show the arrangement of e…
Draw the following: - On the central carbon, add 4 dots around it. - On the top - oxygen, add 2 crosses from the carbon (in the double bond) and 4 dots (2 lone pairs). - On the ri…
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the dissolving agent in an aqueous solution called the a) solute b) sol…
b) solvent
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assignment 9.2: systems of linear equations score: 8/9 answered: 8/9 qu…
Discipline: Mathematics Sub - field: Algebra
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questions 28 - 31 prompt questions 28 - 31: complete the tables by fill…
# protons: 26 # neutrons: 30 # electrons: 23
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questions 28 - 31 prompt: complete the tables by filling in the correct…
# protons: 10 # neutrons: 10 # electrons: 10
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questions 28 - 31 prompt: complete the tables by filling in the correct…
# protons: 7 # neutrons: 9 # electrons: 9
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balance the following chemical equations. each blank is worth one point…
1) 1 Fe + 2 HCl → 1 FeCl₂ + 1 H₂ 2) 2 Na + 2 H₂O → 2 NaOH + 1 H₂ 3) 4 Al + 3 O₂ → 2 Al₂O₃ 4) 1 Mg + 2 HNO₃ → 1 Mg(NO₃)₂ + 1 H₂ 5) 1 Zn + 2 HCl → 1 ZnCl₂ + 1 H₂ 6) 1 H₂SO₄ + 2 NaOH…
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questions 28 - 31 prompt: complete the tables by filling in the correct…
# protons: 15 # neutrons: 16 # electrons: 18
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in 1899, swedish chemist svante arrhenius developed an equation to answ…
remains
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match the type of energy with its example nuclear energy choose chemica…
nuclear energy - the sun chemical energy - batteries, fire light energy - the sun sound energy - strumming a guitar
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which phrase is the best definition of energy the ability to generate h…
Question 1: the ability to do work Question 2: chemical energy
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21 of 26 which is an intensive property of a substance? density volume …
density
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a03r - eqar1: states of matter (review) 20 of 26 which list includes on…
boiling point, conductivity, and color
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15 of 26 which of these is an example of investigating an intensive pro…
determining if a rock is magnetic
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a geochemist examines a piece of metal that he found in the soil. he pe…
He is identifying the metal using physical properties only.
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a student investigated some properties of lead and recorded the finding…
The student investigated more physical properties than chemical properties.
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which statement describes a property that will be the same for both stu…
boiling point because it is an intensive property
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a03r - eqar1: states of matter (review) 3 of 26 which statement describ…
It is the same for every sample of a single substance.
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13) calculate the average atomic mass (decimal form) mass spectrum of s…
$28.1088$
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question 15 0.5 pts what are nurdles? pre - production plastic pellets …
Question 15: Pre - production plastic pellets Question 16: Circular ocean currents that drive accumulations of plastic debris
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which of these has the highest h⁺ concentration? multiple choice lemon …
Lemon juice, pH = 2.3
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which of the following is not an organic compound? multiple choice c₁₆h…
B. $Na_2HPO_3(H_2O)_5$
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which of the following will increase the rate of a chemical reaction? m…
An increase in reactant concentration
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what type of bond is labeled 1? water molecule
Polar - covalent bond
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during photosynthesis, the reactants are transformed into products thro…
| Type of atom | Carbon dioxide | Water | Glucose | Oxygen | | ---- | ---- | ---- | ---- | ---- | | hydrogen (H) | 0 | 2 | 12 | 0 | | carbon (C) | 1 | 0 | 6 | 0 | | oxygen (O) | 2…
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what are the molecular and empirical chemical formulas of a compound ma…
Molecular formula: $C_{4}H_{8}O_{4}$ Empirical formula: $CH_{2}O$
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question 2 not yet answered marked out of 1.00 p flag question copper c…
a. I and V only
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write the systematic name of each organic molecule: structure name 2,5 …
3 - methylhexanal
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practice: predicting products of chemical reactions use your knowledge …
1. \(4Na+O_2 ightarrow2Na_2O\) 2. \(Mg + F_2 ightarrow MgF_2\) 3. \(2Na+Cl_2 ightarrow2NaCl\) 4. \(2Al + 3S ightarrow Al_2S_3\) 5. \(3Ca+2P ightarrow Ca_3P_2\) 6. \(2HgO ightarrow…
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6. in the chemical equation shown, what are the reactants? 4 al + 3 o₂ …
C. Al and O₂
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construct the chemical structure of deoxyadenylic acid. drag the approp…
To accurately answer, we would need to know the specific labels and their correct placement areas. But in general, you would drag the deoxyribose sugar structure, the adenine base…
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which of the following is an allusion? when i won the science fair i wa…
Professor Anderson is such a Scrooge.
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7. sep use models you run an experiment in which two substances chemica…
The mass of the products in the closed - system will be greater than or equal to the mass of the products in the open - system. This is because in an open - system, some of the pr…
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what is a theme in presentation software? a design scheme that changes …
a design scheme that is applied to all slides
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what is the main concern about toxic chemicals in the oceans? they can …
They can bioaccumulate and enter the food chain.
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which state change occurs between points d and e on the heating curve? …
The state change from liquid to gas (vaporization or boiling) occurs between points D and E.
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complete the mathematical function shown below and round the answer to …
5.7 g/mL
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which type of atom variant would result from the described particle cha…
A hydrogen atom gains a neutron: a. isotope An oxygen atom loses an electron: b. ion
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activity a (continued from previous page) 7. compare: how are the elect…
7. Electrons fill 2p orbitals one - by - one like passengers boarding a bus following Hund's rule. 8. Nitrogen: $1s^{2}2s^{2}2p^{3}$, 1s(↑↓) 2s(↑↓) 2p(↑ ↑ ↑); Oxygen: $1s^{2}2s^{2…
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select the correct answer which of the following is a medicine that sti…
C. antitoxin
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how many neutrons are in the nucleus of an atom with an atomic mass of …
B. 45
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activity a: small atoms introduction: electrons are shown arranged in o…
5. The feedback is that the electron - filling violates Hund's rule and electrons should occupy separate 2p orbitals before pairing up. 6. Yes, the configuration is correct now. T…
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for a gas with significant intermolecular attractions, how would p_real…
The first part: The pressure calculated using the ideal - gas law is $2.463\ atm$. The second part: The real pressure $P_{real}$ of methane is less than the ideal pressure $P_{ide…
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sewage, manure, farm runoff, and fertilizers are associated with what t…
inorganic nutrient
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p_real < p_ideal p_real = p_ideal p_real > p_ideal the relationship can…
A. $P_{real}<P_{ideal}$
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consider 1 mole of a real gas occupying a volume of v at a pressure p a…
For the first multiple - choice question: A. $P_{real}<P_{ideal}$ For the second part: The pressure calculated using the ideal gas law is $P_{ideal}=2.463\ atm$. The van der Waals…
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match the vocabulary word to its definition. smallest unit of a chemica…
smallest unit of a chemical element - b. atom amount of matter in an object - a. mass anything that has mass and takes up space - c. matter
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the van der waals equation for n moles of a real gas is p + a(n/v)^2(v …
1. D. b 2. C. The strength of the attractive forces between the molecules. 3. The van der Waals equation $[P + a(n/V)^2](V - nb)=nRT$
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how are elements arranged on the periodic table of elements? a by elect…
B. by atomic number
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a gas is held at a very high temperature and very low pressure. under t…
1. C. Very close to that of an ideal gas. 2. B. Increasing the volume of the container.
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what is a vertical column on the periodic table called? a section b cat…
C. group
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what is the center of an atom called? a atomic center b nucleus c elect…
B. nucleus
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which of the following gases would you expect to behave most ideally un…
1. Helium (He) 2. Methane ($CH_4$), because it has weaker intermolecular forces and smaller molecular size.
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what is the smallest unit of an element that still re- tains the proper…
B. atom
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the ideal gas law is represented by pv = nrt. the van der waals equatio…
1. C. -nb 2. D. The intermolecular attractive forces between gas molecules.
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activity a: small atoms get the gizmo ready - on the periodic table tab…
1. 1s¹ 2. The two electrons in the 1s orbital have opposite spins. 3. 1s² 4. Lithium: 1s²2s¹; Beryllium: 1s²2s²; Boron: 1s²2s²2p¹ 5. (No specific feedback content provided in the …