化学
化学反応、化学量論、分子構造、元素の性質。
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part 1 (0.7 point) cucl₂ choose one or more: copper is the cation. copp…
Part 1: A. Copper is the cation. D. Chlorine is the anion. Part 2: A. Calcium is the cation.
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9. what are properties of nonmetals?
Low electrical conductivity, low thermal conductivity, brittleness in solid state, high ionization energies, high electronegativities, tendency to gain electrons in chemical react…
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which statement best describes the rhyme scheme of \a thought on the in…
We need the actual poem "A Thought on the Inestimable Blessing of Reason" to determine the correct answer. Without it, we cannot choose from the given options.
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8. how does delocalized bonding explain the properties of metals?
Delocalized bonding in metals leads to electrical conductivity (due to free - moving electrons), thermal conductivity, ductility, and malleability (as metal ions can slide while s…
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read the poem oses,\ by george eliot. you love the roses—so do i. i wis…
B. "Night" uses a rhyme scheme
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read the poem roses, by george eliot. you love the roses—so do i, i wis…
"Roses" uses a more modern tone
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read the descriptions of rhyme schemes below. free verse: poetry that d…
A. free verse
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in what way are the lines of the weary blues similar to the lyrics of a…
The poem uses repetition to create meaning.
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cca 1 retest (8.6abe) possible points: 7.69 during a lab activity, stud…
The number of atoms stayed the same.
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name ____________ 7. what are the properties of metals?
Metals typically have high electrical conductivity, high thermal conductivity, malleability, ductility, metallic luster, and high density.
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cca 1 retest (8.6abe) possible points: 15.38 a balanced chemical shows …
A. equation, E. product
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read shakespeares sonnet 19 devouring time, blunt thou the lions paws, …
A. the abab, cdcd, efef, gg rhyme scheme C. the widespread use of iambic pentameter D. the use of three quatrains followed by a couplet
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ph scale: acid, neutral and base. 0 to 6 is considered a. 7 is consider…
0 to 6 is considered an acid. 7 is considered neutral. 8 - 14 is considered a base.
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level 3 (advanced) k₂o + h₂o → koh cr + o₂ → cr₂o₃ cu(no₃)₂ + koh → cu(…
$K_2O + H_2O = 2KOH$; $4Cr+3O_2 = 2Cr_2O_3$; $Cu(NO_3)_2 + 2KOH=Cu(OH)_2 + 2KNO_3$; $BaCl_2+Na_2SO_4 = 2NaCl + BaSO_4$; $2SO_2+O_2 = 2SO_3$; $16Ni + 3S_8=8Ni_2S_3$; $Sc_2O_3 + 3H_…
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ph scale: acid, neutral and base 18. 0 to 6 is considered a _. 7 is con…
18. Acid; Neutral; Base 19. A neutralization reaction occurs, producing salt and water.
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use the paragraph to answer the question. it happens way too often: oil…
There is a smart solution to the ongoing problem of oil spills the industry should use.
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word bank: condensation, melting, freezing, endothermic, exothermic, ev…
1. Endothermic 2. Melting 3. Freezing 4. Exothermic 5. Condensation 6. Evaporation
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how many total atoms make up a single water molecule? 2 4 3 1
C. 3
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identify the product or products of the following acid - base reaction:…
$2H_2O + Ba(ClO_4)_2$ (corresponding to the first option)
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biological importance of water 2 more questions to go the chemical form…
B. $H_2O$
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water is a(n)... nucleus. atom. element. molecule.
D. molecule
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8) what is dopamine often called in relation to motivation? a) the \go\…
A. The "go" chemical that pushes you to act
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a large retail book chain rents textbook to college students for 42.5% …
B. $112.94$
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1 multiple choice 1 point two technicians are trying to inflate a tire.…
1. C. Both technician A and B. 2. B. Coil Spring Compressors
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question 4 of 25 storm radios are designed with backup batteries so tha…
D. Chemical energy in the battery is transferred to electrical energy, which is then transferred into the energy of the vibrating air molecules in the sound waves.
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question 25 of 25 what kind of energy is stored when you squeeze a matt…
B. Elastic energy
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question 24 of 25 a man throws a football straight into the air. which …
D. Gravitational potential energy
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question 19 of 25 you burn a log on a fire. you use the fire to warm yo…
A. Chemical energy is transformed to light energy and heat energy.
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question 12 of 25 you have two pieces of metal. metal a has a higher te…
A. The molecules in metal A are vibrating faster.
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read the following poem, the sun is rising, by john donne. which set of…
She's all states, and all princes, I, / Nothing else is
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what type of energy is thermal energy? a. nuclear energy b. chemical en…
C. Kinetic energy
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question 17: if 1 inch equals 2.54 centimeters, then how many centimete…
A. 25.4 cm
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2) how does regular physical activity help build motivation? (a) it all…
C. It boosts brain chemicals
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gases produced during a chemical reaction have no mass true false
B. False
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question 2 (2 points) all atoms of an element have identical properties…
False
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organic produce is more nutritious than non - organic foods true false …
1. False 2. False 3. True
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what does the term \atomos\ mean? tiny matter indivisible isotope
C. indivisible
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how do chemical engineers use the engineering design process? to find o…
To find optimal solutions to problems.
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democritus proposed that matter was composed of indivisible particles c…
Advances in technology enabling more precise observations and experiments.
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which of the following best describes why its important to know which s…
D. All of these are true
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question 01: what is the primary purpose of dimensional analysis? 1 poi…
Question 01: a. To check for dimensional consistency in equations Question 02: a. A fraction that represents the equivalence of two units
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question 26 of 27 you put a new battery into your mp3 player and listen…
C. Chemical energy to electric energy to kinetic energy to sound energy
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15 multiple choice 1 point which is the correct name for the compound (…
B. ammonium sulfate
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14 multiple choice 1 point which of the following pairs of elements is …
magnesium and fluorine
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what molecular shape does the compound ccl4 have? octahedral trigonal p…
C. tetrahedral
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the \size\ of the atom; generally increases from top to bottom within a…
Atomic Radius
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12 multiple choice 1 point which type of molecular shape is shown by th…
trigonal planar
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11 multiple choice 1 point the electron configuration of a sulfide ion,…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$ (the last option)
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10 multiple choice 1 point which is the correct name for the compound p…
D. phosphorus pentachloride
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multiple choice 1 point which is the formula for the compound sulfur he…
A. $SCl_{6}$
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question 4 (1 point) what volume of 1.50 m kbr solution should you use …
B. 11.7 mL
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thermal energy and kinetic molecular theory quick check based on the la…
Energy cannot be created or destroyed by ordinary chemical or physical means.
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8 multiple choice 1 point which of following compounds is polar? nh3 co…
A. $NH_3$
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question 3 (1 point) how many grams of kbr do you need to make 0.2500 l…
36.0
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7 multiple choice 1 point which is the correct name for the compound ca…
calcium carbonate
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question 2 (1 point) how many moles of kbr are in 59.1 grams? report yo…
0.497
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read this sonnet, and then complete the sentences that follow sonnet 4 …
The sonnet is written in the Spenserian form. The rhyme scheme is abab bcbc cdcd ee. The main idea of the poem is lasting love. The poet has used the metaphor of burning an oak to…
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question 1 (1 point) what is the molar mass of potassium bromide? a) 11…
A. 119.00 g/mol
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6 multiple choice 1 point how does calcium obey the octet rule when rea…
It gives up electrons.
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read this sonnet, and then complete the sentences that follow. sonnet 4…
wound
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5 multiple choice 1 point which is the correct formula for the compound…
C. $Cr(NO_3)_2$
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read this sonnet, and then complete the sentences that follow. sonnet 4…
metaphor; metaphor
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multiple choice 1 point how many electrons are shared in a double coval…
B. 4
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3 multiple choice 1 point which is the correct formula for the compound…
D. $N_2O$
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which of the following diatomic molecules is joined by a double covalen…
D. $O_2$
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read this sonnet, and then complete the sentences that follow. sonnet 4…
The sonnet is written in the Spenserian form. The rhyme scheme is abab bcbc cdcd ee. The main idea of the poem is that love that is hard - won is more lasting. The poet has the ex…
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unit 3 test: bonding please make sure you have your reference sheet and…
C. 2+
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this is an atomic model of an element from the periodic table. how woul…
A. The number of protons and electrons would both increase by 22 because the atomic number of krypton is 36, and the number of neutrons would increase by 48 because the atomic mas…
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the passage below describes an experiment. read the passage and then fo…
When sugar is added to water, does the water's temperature affect the amount of time it takes the sugar to dissolve?
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in the periodic table, which of the highlighted elements has the greate…
B. Iron, Fe
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atomic structure an atom is made up of protons and neutrons (both found…
| Element/Ion | Atomic Number | Atomic Mass | Mass Number | Protons | Neutrons | Electrons | |--|--|--|--|--|--|--| | H | 1 | 1.008 | 1 | 1 | 0 | 1 | | H+ | 1 | 1.008 | 1 | 1 | 0 …
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in the water cycle, water molecules absorb thermal energy from the sun,…
A. The molecules move so fast that they break the bonds holding them together and turn into a gas. As they rise to cooler temperatures, they slow down and rejoin to form water dro…
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the diagram is an illustration of a common substance found in the atmos…
D. It is a molecule because it has two different elements that are held together by bonds.
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11 complete the following sentence: isotopes of the same element have..…
the same number of protons, but different number of neutrons
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12. which value of an element is calculated using both the mass and the…
Atomic mass
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question # 9 multiple choice which of the following special - operation…
C. ARFF
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group 2 4 be beryllium 9.012 12 mg magnesium 24.305 how many valence el…
B. 2
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question #5 multiple choice what other feature do class b foams and dry…
They decrease flammability of the fuel.
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7. why does it take food coloring longer to dissolve in cold water then…
The lower kinetic energy of water molecules in cold water leads to less frequent and less energetic collisions with food - coloring particles, causing it to dissolve more slowly c…
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27. what styling options will best fulfill a clients desire to make an …
27. a. Choose a chin - length style that is close on the top of the head with more volume on the sides. 28. a. triangular 29. a. Space is the area the hairstyle occupies. 30. d. c…
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use the following information to answer the next question. some of the …
d. Adding \(NO_{2(g)}\)
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2. in this class we will mainly focus on which two physical science? (1…
First semester: Chemistry Second semester: Physics
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ec5 classwork ionic compound practice write the ions and then the formu…
Silver acetate: Ions: $Ag^{+}, C_{2}H_{3}O_{2}^{-}$ Formula: $AgC_{2}H_{3}O_{2}$ Barium phosphate: Ions: $Ba^{2+}, PO_{4}^{3-}$ Formula: $Ba_{3}(PO_{4})_{2}$ Iron (II) oxide: Ions…
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use the simulation to answer the question. build an atom. on the home s…
C. magnesium (Mg)
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according to the octet rule, if an atom has fewer than 8 electrons in t…
It will react with other nearby atoms to give, receive or share electrons until it has a full outer shell
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why are the noble gases the least reactive elements? (1 point) they are…
Their outer most energy levels are complete with 8 electrons.
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what can be stated for a particular element if only the group number of…
The element has 4 valence electrons.
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a student chemist set out to identify three unknown elements by compari…
Unknown #1: As Unknown #2: Te Unknown #3: P
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details no additional details were added for this assignment. surface t…
Surface Tension: This property is strong in water because it is difficult to break water's surface. Universal Solvent: Water is able to pull most bonds apart by surrounding both s…
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composition of atoms quick check what determines an atom’s identity? (1…
the number of protons
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unit test 1c - periodic table and periodic trends adv refer to the peri…
Element that has the same number of valence electrons as B: M Is an Alkaline Earth Metal: A Has 6 valence electrons: H Is a member of the most reactive group of non - metals: P
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enthalpy diagram reaction progress energy and enthalpy statements 1 the…
2, 3, 5
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part i paper clips are made of stainless steel. steel is a mixture. the…
No, the density of stainless steel and carbon steel would not be the same because they are made of different substances with different densities and in different ratios.
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select the correct text in the passage. a writer is using the following…
Her work showed that the natural movements of the body create the most potential for beautiful choreography.
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balance of atoms quick check when iron rusts and forms iron oxide, the …
Iron oxide has oxygen atoms, and pure iron does not.
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one molecule of calcium oxide, cao, and one molecule of carbon dioxide,…
$CaCO_3$
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balance of atoms quick check which statement correctly explains why the…
Some of the atoms in the paper became gases.
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9a. what event is occuring? 9b. circle chemical change or physical chan…
9a. Evaporation of water 9b. Physical Change
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balance of atoms quick check it takes 1 molecule of nitrogen and 3 mole…
$2N_2$ and $6H_2$
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in the equation 2h₂ + 1o₂ →→ 2h₂o if you change the 2h₂ to 3h₂ molecule…
It is not possible to produce water without leftover molecules.