Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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what is the very smallest piece of silver possible? a silver atom a sil…
A. a silver atom
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which statement best describes the electrons in a bohr model? a electro…
B. Electrons orbit around the nucleus in energy levels.
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what type of atom makes up the element tin (sn)? nitrogen atoms argon a…
Tin atoms
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using the model and a periodic table, answer the following questions. b…
A. Phosphorus
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how does chromatography separate pigments? by solubility by ph level by…
by solubility
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which element shares similar properties with calcium (ca)? scandium (sc…
B. Strontium (Sr)
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3. use the periodic table to locate the eight elements in this activity…
| | H | Ca | Ne | Na | Li | Mg | He | Fe | |--|--|--|--|--|--|--|--|--| | Atomic mass | 1 u | 40.08 u | 20.18 u | 22.99 u | 6.94 u | 24.31 u | 4.00 u | 55.85 u | For question 4: L…
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using the model and a periodic table, answer the following questions. b…
C. 3
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chemistry part 1 - lesson 21 assessment - edcp800 question what does th…
the electron sublevel
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all electrons of a given atom have the same four quantum numbers. true …
False
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freshflow produces organic juice bottles. the company has gathered data…
between $q = 0$ and $q = 25$
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a local farmers market introduces a new line of organic vegetables that…
The price ceiling will have no effect on the market.
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aldehydes and ketones are very similar in that they both contain phosph…
1. C. a carbonyl group 2. D. soluble in water 3. B. simple sugar (monosaccharide) 4. B. oxygen is more electronegative than hydrogen.
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which is the first occupied sublevel? o subshell p o subshell f o subsh…
subshell s
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what is the maximum number of electrons that can be held in a d subleve…
C. 10
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part b criteria are the specific goals of the design. list at least two…
1. The cup should be able to efficiently transfer heat to support the endothermic reaction. 2. The material of the cup should be thermally stable and not react with the substances…
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what does the quantum number (m_{l}) indicate? ( \bigcirc) the overall …
the location of an electron within the sublevel
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poster draw a poster that illustrates how evidence of chemical reaction…
A poster with visual examples of chemical - reaction evidence (color change, gas evolution, precipitate formation, temperature change) and simple chemical equations.
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catalysts are not in the reaction, allowing them to be reused.
consumed
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in a chemical reaction, catalysts act as molecular, guiding the reactan…
guides
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draw two fully worked - out ideas for the cup. include exact dimensions…
Idea 1: Drink compartment is a cylinder with $r\approx4.37$ $cm$ and $h = 10$ $cm$, cold - pack is a cube with side length $\approx5.31$ $cm$ placed beside the cylinder. Idea 2: D…
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complete the following table: some polyatomic ions name chemical formul…
| name | chemical formula | |--|--| | hydronium cation | $H_3O^+$ | | phosphate anion | $PO_{4}^{3 - }$ | | carbonate anion | $CO_{3}^{2 - }$ | | cyanide anion | $CN^-$ |
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question 1(multiple choice worth 2 points) oss_01the first three steps …
The contracting nebula flattens into a disk with a bulge at the center.
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complete the following table: some polyatomic ions name chemical formul…
| name | chemical formula | |--|--| | carbon | $CO_3^{2 - }$ | | phosphate | $PO_4^{3 - }$ | | hydronium cation | $H_3O^+$ | | hydroxide | $OH^-$ |
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write the chemical formula for this molecule:
$SeOCl_2$
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fill in the systematic names of the following chemical compounds. note:…
| molecular formula | name of compound | | ---- | ---- | | $SeS_2$ | selenium disulfide | | $Se_4S_4$ | tetraselenium tetrasulfide | | $XeF_6$ | xenon hexafluoride | | $XeO_3$ | x…
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course activity: building a device that uses energy from chemical reac …
The cup will be used for holding a drink and keeping it at a certain temperature (using the cold - pack compartment).
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part e could this chemical reaction be used for a cold pack? justify yo…
It depends on whether the chemical reaction is endothermic or exothermic. If endothermic, yes; if exothermic, no.
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decide whether each pair of elements in the table below will form an io…
| element #1 | element #2 | Forms ionic compound? | empirical formula of ionic compound | name of ionic compound | | ---- | ---- | ---- | ---- | ---- | | sulfur | strontium | yes …
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nicole and chanice are building scale models of molecules for chemistry…
Determine Nicole's unit rate: 1.3889 models per 1 hour Specify Nicole's rate: \(\frac{6}{5}\) models per hour Determine Chanice's unit rate: \(\frac{4}{3}\) models per 1 hour Spec…
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part d did the chemical reaction absorb or release energy? how do you k…
If the temperature of the surroundings decreases during the chemical reaction, it absorbs energy (endothermic). If the temperature of the surroundings increases, it releases energ…
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example 2: sodium (na) electron configuration: noble gas configuration …
Electron Configuration: $1s^{2}2s^{2}2p^{6}3s^{1}$ Noble Gas Configuration (abbreviated): $[Ne]3s^{1}$
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select all that apply which are functions of astrocytes? form blood - b…
- Form blood - brain barrier - Convert blood glucose to lactate for neurons to use for fuel - Regulate chemical composition of tissue fluid
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part b add 2 teaspoons of baking soda and 2 teaspoons of citric acid to…
Yes, a chemical reaction is taking place. We know this because when baking soda and citric acid are mixed in water, effervescence (bubbling) occurs, which is a sign that a new sub…
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complete this table. | name | empirical formula | |--|--| | magnesium b…
| name | empirical formula | |--|--| | magnesium bromide | $MgBr_{2}$ | | lithium fluoride | $LiF$ |
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nicole and chanice build scale models of molecules for chemistry class.…
Nicole's unit rate: 1 hour, \( \frac{6}{5} \) models Specify Nicole's rate: \( \frac{6}{5} \) models per hour Chance's unit rate: 1 hour, \( \frac{4}{3} \) models Specify Chance's…
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what makes good people do bad things? melissa dittmann • 2004 font size…
A. social situations
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phosphorus (p) electron configuration: ____________ noble gas configura…
Phosphorus: Electron Configuration: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ Noble Gas Configuration (abbreviated): $[Ne]3s^{2}3p^{3}$ Fluorine: Electron Configuration: $1s^{2}2s^{2}2p^{5…
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electron configuration & orbital practice electron configurations in th…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$
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what type of footwear protects you from chemicals and provides extra tr…
Rubber boots
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post lab questions 1. what is the mole ratio of hydrogen peroxide to pe…
No, because it is more important to know the density of $H_2O_2$ in order to find the mass %. ### 2b
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what determines how much, if any, of a solute is dissolved? application…
C. saturation
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study the sentence below. then, choose the type of error that the sente…
# Breve explicación: El nombre de una materia ("Chemistry") y el nombre de un idioma ("german") deben ser escritos con mayúscula inicial. La palabra "german" está mal capitalizada…
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which atmospheric gas is the lightest because it only has one proton an…
C. hydrogen
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study the sentence below. then, choose the type of error that the sente…
# Bre[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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model 2 - prefixes and suffixes prefix numerical value mono- 1 di- 2 tr…
7) -ide 8) When there is only one atom of the first element in the compound. 9) Phosphorus tribromide, Sulfur tetrachloride, Dinitrogen difluoride, Sulfur trioxide, Bromine monofl…
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15. chemistry a lab technician has 40 gallons of a 15% iodine solution.…
10 gallons
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6) examine the prefixes in model 2 below. fill in the numerical value t…
6) mono -: 1, di -: 2, tri -: 3, tetra -: 4, penta -: 5, hexa -: 6, hepta -: 7, octa -: 8, nona -: 9, deca -: 10 7) -ide 8) When there is only one atom of the first - named elemen…
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the breaking of chemical bonds ______ energy, while the forming of bond…
B. absorbs; releases
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why? when you began chemistry class this year, you probably already kne…
1. | Molecular Formula | Number of Atoms of First Element | Number of Atoms of Second Element | | ---- | ---- | ---- | | $ClF$ | 1 | 1 | | $ClF_5$ | 1 | 5 | | $CO$ | 1 | 1 | | $CO…
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is the study of energy changes that occur during chemical reactions and…
Thermochemistry
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electron configuration & orbital practice which of the following is the…
Because the s sublevel within the 2nd energy level exceeded the maximum # of electrons
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electron configuration & orbital practice the following electron config…
C. 20, Calcium
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4. characterize the substances below with the help of their respective …
A. Molecular, Ionic, Metallic, Molecular
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11 multiple choice 1 point use the given ion charges to determine the f…
$(NH_4)_3(PO_4)$
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10 multiple choice 1 point use the given ion charges to determine the f…
Ni(NO_3)_2 (last option)
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3. a series of substances have the same chemical formula (c28h44o, 396.…
a) Ergosterol
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9 multiple choice 1 point use the given ion charges to determine the fo…
D. $CrO_2$
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8 multiple choice 1 point use the given ion charges to determine the fo…
Li(OH)
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multiple choice 1 point use the given ion charges to determine the form…
B. $Al_2(SO_4)_3$
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why? when you began chemistry class this year, you probably already kne…
1) For $ClF$: 1 chlorine atom, 1 fluorine atom; for $ClF_5$: 1 chlorine atom, 5 fluorine atoms; for $CO$: 1 carbon atom, 1 oxygen atom; for $CO_2$: 1 carbon atom, 2 oxygen atoms; …
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6 multiple choice 1 point use the given ion charges to determine the fo…
D. CaS
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5 multiple choice 1 point use the given ion charges to determine the fo…
A. SrBr₂
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2. in which of the following pure substances will hydrogen bonding be a…
a) 2 and 3
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4 fill in the blank 1 point name the following compound: gacl3 use only…
gallium trichloride
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why? when you began chemistry class this year, you probably already kne…
1. See filled - in table above. 2. 2 non - metals; molecular compounds. 3. Use of prefixes to indicate number of atoms. 4. Different numbers of fluorine atoms; need prefixes for d…
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the smallest unit of an element that retains its chemical properties, c…
1. Atom 2. Octet rule 3. Isotopes 4. Atomic mass 5. Atomic number 6. Cation 7. Ion 8. Anion
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3 fill in the blank 1 point name the following compound: ca3n2 use only…
calcium nitride
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match conducted the gold foil experiment, which revealed the existence …
1. Ernest Rutherford 2. John Dalton 3. James Chadwick 4. Erwin Schrödinger 5. Niels Bohr 6. J. J. Thomson
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isotope protons neutrons electrons mg - 24 12 12 12 mg - 25 12 13 12 mg…
1. Magnesium 2. Mg - 24; the atomic mass of magnesium (24.4 amu) is closest to the mass of Mg - 24 (24 amu) Reflection 1: Isotopes have same protons but different neutrons. Reflec…
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9/25/25, 9:15 am exam 1 22. part a an atom with an atomic number of 10 …
22. 14 neutrons 23. False 24. False 25. There is one carbon and four hydrogen atoms. 26. True 27. True
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daniela wrote a table comparing pure substances and mixtures. pure subs…
A. Mixtures are substances that are not chemically combined.
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9/25/25, 9:15 am exam 1 28. part a which of the following is chemically…
28. neon (atomic number 10) 29. one 30. ionic 31. False 32. False 33. True
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the illustration below, taken from the periodic table, provides informa…
D. to the left of calcium
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short answer q 13. which letter in the phase diagram below best represe…
(i) G (ii) F
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the goal of your paper is to provide information about one scientists l…
I would choose Marie Curie. Her life was filled with remarkable achievements and challenges, and her contributions to the understanding of the atom through her work on radioactivi…
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the heat transferred to the ice increases the thermal energy of the mol…
When heat is added to ice, the increased thermal energy weakens intermolecular forces, allowing water - molecules to move more freely and change from a solid to a liquid state.
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when e - cigarette metal coils heat up to turn e - liquids into aerosol…
D. All of the above
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during an experiment, lithium (li) was combined with fluorine (f) to fo…
1. Ionic compound. Because lithium is a metal and fluorine is a non - metal and they form an ionic bond through electron transfer. 2. Group 17. As it has 7 valence electrons. 3. F…
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an element on the periodic table is in group 17 and period 4. which of …
The element has 4 energy levels and is in the p - block.
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the coefficient for the d - block is always so on the 4th row of the pe…
Atomic number of aluminum: 13 Longhand Configuration: 1s²2s²2p⁶3s²3p¹ Shorthand Configuration: [Ne]3s²3p¹
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a scientist working on the problem of sustainable energy measures the e…
C. Reaction B is most likely nuclear fusion, where two smaller atoms collide at great speed and fuse to form a larger atom. Reaction C is most likely a chemical reaction, while A …
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question 10 according to professor dave (in the video), carbon - carbon…
C. strong enough to be stable, but not so strong that they can't break and rearrange
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which of the following is a type of bond in which one pair (2 electrons…
For the first question: C. single bond For the second question: C. triple bond
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pro tip: for neutral atoms, if you add up it will match the number of i…
- What is the electron configuration for sulfur (S)? $1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}$ - When writing a shorthand, or condensed, electron configuration, which Noble Gas do you alwa…
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scenario 1: medical isotopes (carbon - 14) doctors use carbon - 14 to t…
| Isotope | Protons | Neutrons | Electrons | | ---- | ---- | ---- | ---- | | Carbon - 12 | 6 | 6 | 6 | | Carbon - 13 | 6 | 7 | 6 | | Carbon - 14 | 6 | 8 | 6 | Carbon - 14 is still…
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question 6 why is carbon chemically important? (select all that apply) …
Question 6: A. carbon can easily bond with itself to form long chains, B. carbon can easily bond with hydrogen, oxygen, nitrogen, phosphorus and sulfur, C. carbon has 4 valence el…
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write the information about the parts of electron configurations below.…
| Part | Part Represents | Example of H = 1s¹ | |--|--|--| | Coefficient | Principal energy level | 1 | | Letter | Orbital type | s | | Exponent | Number of electrons in orbital |…
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question 1 a water molecule is made up of one oxygen and two hydrogen a…
Question 1: C. covalent Question 2: A. Water is able to dissolve many substances.
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english crossword puzzle grade across 4. a type of punctuation mark tha…
Across: 4. Apostrophe 5. Abstract noun 9. Phrase 10. Onomatopoeia 13. Rhyme 14. Simile 15. Sentence Down: 1. Paragraph 2. Metaphor 3. Alliteration 6. Personification 7. Dictionary…
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327 chemistry prep ii unit 1 ch 3 test name: anisine collins read and i…
1. If copper (Cu) is selected: Element; Color (intensive); Ability to react with oxygen (chemical property) 2. See the filled - in table above for states of matter properties. 3. …
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which would be the correct noble gas configuration for aluminum (al)? n…
O [Ne] 3s² 3p¹
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case file chemical name: toulene common uses: this chemical is used as …
This chemical is used as a solvent in paints
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case file chemical name: propylene glycol common uses: this chemical ab…
Inhaling something containing the chemical
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case file chemical name: propanal common uses: this chemical is used to…
The respiratory system
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when writing electron configurations, you always start with and work yo…
When writing electron configurations, you always start with the lowest - energy orbital (1s) and work your way over from lower - energy orbitals to higher - energy orbitals until …
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which sublevel below would be filled last by electrons? o 1s o 4p o 5d …
C. 5d
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case file chemical name: phenol common uses: this chemical is used as a…
This chemical clears the lungs when you have a cold
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which of the following shows the most likely orbital configuration for …
The third option (with 2 electrons in 1s, 2 in 2s, and 5 in 2p with the correct spin - pairing and single - occupancy according to Hund's rule) shows the correct orbital configura…
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case file chemical name: diethylene glycol common uses: this chemical i…
This chemical is used to make polyurethanes.