Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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what is the most likely reason rita dove chose to call this poem a sonn…
The poem contains 14 lines.
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focus question: can you separate out iron from breakfast cereal? backgr…
| Element in Cheerios | Chemical Symbol | | ---- | ---- | | Sodium | Na | | Potassium | K | | Calcium | Ca | | Iron | Fe | | Phosphorus | P | | Magnesium | Mg | | Zinc | Zn |
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which of the following is influenced by the polarity of bonds in the wa…
4) All of the above
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question 9 (1 point) listen which of the following will have resonance …
1) Molecule with more than one correct Lewis structure
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which of the following does not apply to electronegativity? check all t…
3. Electronegativity decreases across a Period and increases down a Group 4. H - O bond is less polar than H - C bond
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which of the following does not apply to electronegativity? check all t…
3. Electronegativity decreases across a Period and increases down a Group 4. H - O bond is less polar than H - C bond
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question 7 (1 point) listen which of the following can form covalent bo…
2) $Cl_2$
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youre eating what for breakfast? focus question: can you separate out i…
Calcium - Ca, Iron - Fe, Phosphorus - P, Magnesium - Mg, Zinc - Zn, Sodium - Na, Potassium - K
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ethanol, c₂h₅oh, is made industrially by the reaction of water with eth…
\(-44\ kJ\)
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which of the following will have a double bond between c and c, and wil…
2) $C_2H_4$
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which of the following will have a bent molecular geometry (not electro…
4) All of the above
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question 4 (1 point) listen when a metal atom transfers one or more ele…
2) Ionic
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sulfate ion so₄²⁻ will have which of the following? (hint: you will hav…
1) Tetrahedral for both electron and molecular geometries
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question 2 (1 point) listen which of the following has been stated corr…
3) Br⁻ ion will have the electronic configuration of Ar
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when there is unequal sharing of electrons to form a bond, which of the…
It is between two nonmetals, It is covalent bond, It is polar covalent bond, There is partial charge on both atoms, resulting in dipole moment
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how would a 3d model of glucose differ from the formula model? (1 point…
C. A 3D model shows how the different atoms are arranged, but the formula model does not.
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copper metal can be produced by heating copper(1) oxide and hydrogen ga…
$4.1\ kJ$
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what element does the electron configuration represent? 1s² 2s² 2p⁶ o a…
neon
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electron configuration assignment what is the element is shown by the e…
Sr
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label the correct way to write electron configuration. 2p⁴ energy level…
Left - hand box: Energy Level Middle box: Type of orbital (shape) Right - hand box: Number of electrons
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electron configuration assignment what element is represented by the el…
B. aluminum
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electron configuration assignment how many electrons can the 3d orbital…
C. 10
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given the following thermochemical data, the $delta_{r}h^{circ}$ for th…
C. $-3.12\times10^{2}\text{ kJ}$
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what is the correct electron configuration for the element shown below?…
1s² 2s² 2p⁴
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electron configuration assignment which orbital fills first, 4s or 3d? …
A. 4s
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electron configuration assignment what is the element is shown by the e…
Sulfur (S)
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what element is represented by the electron configuration below? 1s² 2s…
phosphorus
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electron configuration assignment what is the element is shown by the e…
Argon (Ar)
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another way to write the equation c₂h₆(g) ⇌ c₂h₂(g) + 2 h₂(g) δh = +3.2…
a. $2H_2(g)+C_2H_2(g) ightleftharpoons C_2H_6(g)+3.2\times10^{2}\text{kJ}$ (Note: The sign of energy in this option is wrong for the forward reaction but it is the closest in term…
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electron configuration assignment what is the element is shown by the e…
Niobium (Nb)
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electron configuration assignment what is the element is shown by the e…
Arsenic (As)
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why is the water cycle considered a closed system on earth? water molec…
Water is constantly recycled.
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question 1 advancements in chemical instrumentation have not lead to ne…
False
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question a molecule has: select the correct answer below: ○ length ○ ma…
D. all of the above
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homework: balance the redox reactions in both acids basic media ② $pbo_…
Acidic medium: $5PbO_2+I_2 + 8H^+ ightarrow 5Pb^{2 + }+2IO_3^-+4H_2O$ Basic medium: $5PbO_2+I_2 + 4H_2O ightarrow 5Pb^{2 + }+2IO_3^-+8OH^-$
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alchemy is considered an early form of chemistry. true false
True
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question 1 chemistry was practiced throughout the ancient world. true f…
True
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no chemical reaction can take place in a vacuum true false
False
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read the lines from act i, scene v of romeo and juliet. romeo: to julie…
C. Romeo's lines make up one quatrain, which uses an abab rhyme scheme.
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covalent bonds worksheet #2 name: draw the lewis structure for the mole…
The Lewis structures and names for the given substances (or substances assumed from the given elements) are as described above for each case.
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question 4 not yet answered marked out of 1.0 p flag question an enthal…
B. the difference in the chemical potential energies of the reactants and the products in a chemical change
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4. what are three common clues that a chemical change has occurred? 5. …
4. Production of gas, formation of a precipitate, change in color. 5. A chemical change forms new substances with different chemical properties; a physical change only alters phys…
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inside a calorimeter, the energy gained by the surroundings (the water)…
True
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writing and naming ionic compounds fill in each column with the appropr…
See the completed table above.
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13. where do the tetrahedra bond to each other? a. the center of the si…
B. at any oxygen atom
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melting and boiling points of some substances substance melting point b…
5. melting; boiling 6. Evaporation (or Distillation) 7. physical 8. Chemical 9. precipitate 10. gas 1. The properties of a compound are different from those of its constituent ele…
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name 10. what physical properties of nylon and leather make them good m…
10. b. durability and flexibility 11. d. the size of their particles 12. d. composition 13. c. oxygen 14. d. change in shape 15. d. water breaking down into hydrogen and oxygen Co…
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a radioactive nuclide that is used for radiation therapy for cancer has…
$^{60}_{27}Co$ (corresponding to the last option in the multiple - choice list)
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multiple choice write the letter that best answers the question or comp…
1. b. compounds 2. c. element 3. b. Al 4. d. compound 5. d. sand 6. a. homogeneous mixture 7. b. size of its largest particles 8. d. gold 9. a. water
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continue questions below*** 8. what are pools (reservoirs) - 9. what is…
8. Pools (reservoirs) are storage sites in biogeochemical cycles. 9. Residence time is the average time a substance stays in a pool. 10. Flux is the rate of transfer between pools…
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vocabulary review use what you know about the vocabulary terms listed o…
A mineral
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sentence check 1 using the answer line provided, complete each item bel…
1. I. permeate 2. B. forestall 3. H. opportune 4. E. interrogate 5. J. retribution 6. A. disparity 7. C. insidious 8. G. omnipotent 9. D. insinuate 10. F. obsequious 1 - 2. A. dis…
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to prevent accidental poisoning, you should not __________. a mix chemi…
C. keep materials in unlabeled containers
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part 2 - applied density problems 1. ethanol has a density of 0.789 g/c…
1a. $177.525\ g$ 1b. $95.1\ cm^{3}$ 2. Density of water is approximately $1\ g/mL$, meaning 1 mL of water has a mass of 1 g. 3. Density of olive oil is approximately $0.903\ g/cm^…
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what role does water play in the earths energy system? it only affects …
It stores and transfers energy due to its high heat capacity and phase changes
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the diagram shows the electron configuration around the chlorine nucleu…
7, 7+
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the figure shows the elements of period 3 and the first 3 elements of g…
Se, Na, Na, Ar, O
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in this performance task, you will answer 4 questions. the united natio…
Nh
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in this performance task you will answer four questions. the electron c…
Atom X = 1, Atom Y = 7
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based on the periodic table, which other element is likely to share com…
A. Cs
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with the exception of he, how many valence electrons do noble gases hav…
B. 8
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the table shows the first, second, and third ionization energies of fou…
D. 4 2 3
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oxygen reacts with many different elements to form different molecules.…
NO (g), CO (g)
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the list identifies various properties of four elements. element 1 is a…
Elements 2 and 4
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identify all of the items that represent an element and not a molecule.…
H, Li, Ne
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in this performance task you will answer four questions. the electron c…
C. 7
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read the passage and answer the next two questions. during a classroom …
It has two valence electrons. It belongs to the third period.
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which arrangement of the following period 5 elements, from left to righ…
Te, Sb, In, Sr, Rb
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in this performance task, you will answer 4 questions. the united natio…
It has a full valence shell of electrons. It is relatively unreactive.
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exam 1 which of the following is a characteristic of the group 14 eleme…
They have 4 valence electrons.
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which list arranges the elements na, li, k, rb, and cs in order of incr…
Cs, Rb, K, Na, Li
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exam 1 which characteristic is not a periodic trend? o atomic radius o …
number of elements in a group
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question 1. which list of elements contains a metal, a metalloid, and a…
Sodium (Na), boron (B), and oxygen (O).
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question 2. match the name of each group with its corresponding group n…
Group 1 (or 1A): Alkali Metals Group 2 (or 2A): Alkaline Earth Metals
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in this performance task you will answer four questions. the electron c…
Yes, similar precautions are needed because potassium is highly reactive and its reaction with Atom Y will be exothermic, releasing a large amount of heat which could crack the gl…
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#9.) a sudden and violent movement of a tectonic plate could cause a(n)…
- #9. c. All of the above - #10. a. mechanical weathering - #11. a. glacier
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question 3. metals, metalloids, and nonmetals are essential categories …
Metals: Key properties - shiny, malleable, ductile, good conductors of heat and electricity. Example: Copper, used for electrical wiring due to its excellent conductivity. Metallo…
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in this performance task, you will answer 4 questions. the united natio…
It would most likely form cations when it reacts.
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read the passage and answer the next two questions. during a classroom …
Ca, it belongs to Group 2
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unit 1- matter and the mole 22. which substance cannot be decomposed in…
22. b. aluminum 23. a. homogeneous composition 24. a. Control 25. d. 3.4 g/mL 26. c. Amount of water 27. b. Corn without fertilizer 28. d. dependent variable 29. b. 1.0 30. c. $6.…
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12. a chlorine atom has a mass number of 37 and an atomic number of 17,…
20
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oxygen - 18 has an atomic number of 8, how many electrons are in a neut…
8
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unit 1- matter and the mole unit 1 practice test directions: differenti…
3. 1.5 g/cm³ 4. 2.19 g/cm³ 5. 128.544 g 6. Mixture 7. Pure substance 8. Pure substance 9. Heterogeneous mixture 10. Homogeneous mixture 11. Heterogeneous mixture 12. $3.99\times10…
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10. look at the isotope data below: isotope mass (amu) abundance (%) si…
The average atomic mass of silver is $108.07$ amu. Silver - 107 contributes more to the average.
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9. isotopes of carbon include carbon - 12 and carbon - 14. how is their…
Carbon - 12 and Carbon - 14 have the same number of protons (6), but Carbon - 12 has 6 neutrons and Carbon - 14 has 8 neutrons.
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a neutron can be defined as clear all a particle with mass roughly equa…
A particle with no charge located inside of the atom and with mass roughly equal to that of the proton.
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7. an atom of neon has a mass number of 20 and an atomic number of 10. …
10
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use the trends notes in the next page to answer the following questions…
1. oxygen < carbon < aluminum < potassium 2. aluminum < neon < sulfur < oxygen 3. Fluorine has a smaller atomic radius and higher effective nuclear charge, so its outermost electr…
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4. the atomic number of sodium is 11, how many protons does sodium have…
C. 11
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how does the tilt of the earths axis affect the seasons? by changing th…
By changing the amount of direct solar energy reaching the surface of Earth.
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practice: atomic calculations part 1 atomic structure 1 draw five proto…
| Element | Atomic # | Mass # | # of $p^{+}$ | # of $n^{0}$ | # of $e^{-}$ | | ---- | ---- | ---- | ---- | ---- | ---- | | Li | 3 | 7 | 3 | 4 | 3 | | P | 15 | 31 | 15 | 16 | 15 | …
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2. propose a model for how what you identified in question 1 is able to…
1. Cellulose is broken down by enzymes (such as cellulases) through hydrolysis of glycosidic bonds. 2. The reaction of breaking bonds between two glucose monomers in maltose is $C…
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one brand of vinegar has a ph of 4.5. another brand has a ph of 5.0. th…
$2.2\times10^{-5}$
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1. atoms and chemicals (a) explain the structure of an atom. 2. (a) sod…
| Subatomic particle | Charge | Number present in a sodium atom | |--|--|--| | Electron | - 1 | 11 | | Neutron | 0 | 12 | | Proton | + 1 | 11 | (ii) Ion (b)(i) $CaCO_{3}$
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poems by edmund spenser notice how spenser uses vivid imagery to convey…
1. **Rhyme - scheme annotation**: In the first and third lines, the rhyming pair is "ice" and "desire". In the second and fourth lines, the rhyming pair is "great" and "entreat". …
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solution is a measure of how acidic it. the acidity, the lower the ph. …
2
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what is the chemical symbol for magnesium? mo mn mg md
C. Mg
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which element is a halogen? argon bromine calcium lithium
B. bromine
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which is classified as an inner transition element? calcium copper ferm…
C. fermium
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which property would cesium most likely have? it is hard. it is ductile…
B. It is ductile.