Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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radish extract indicator turns to a bright red color in low ph solution…
B. The indicator will turn mustard - yellow because there are more $\ce{OH^-}$ than $\ce{H^+}$ ions, and the solution is basic.
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particles moving faster with an increase in solubility is an indication…
D. temperature ### Second Question (Net Ionic Equation)
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what type of reaction is the following: 8nahco₃ -> na₂co₃ + co₂ + h₂o s…
Decomposition (the option labeled "Decomposition" among the choices)
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16 true or false 1 point pressure has the greatest effect on the solubi…
False ### Question 17 (Multiple Choice)
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a substance that is 3 on the ph scale would be a(n) (options: acid, oka…
acid (assuming the first option is "acid" as per the visible text and context of pH scale: pH < 7 is acidic, pH = 7 is neutral, pH > 7 is basic)
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14 multiple choice 1 point which reaction types form a solid product? n…
B. precipitation reactions ### Question 15
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what reaction has the following general formula: a + cd --> c + ad opti…
A. Single Replacement
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a covalent compound with a high polarity will likely... form a precipit…
B. form a homogeneous mixture with water (assuming the options are labeled A, B, C, D with B being this option) ### Question 12 (Deciding Factor for Polarity)
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28/50 a mixture that appears to be evenly mixed throughout: a compound …
D. a homogeneous mixture (assuming the options are labeled A to D as a compound, an atom, a heterogeneous mixture, a homogeneous mixture respectively)
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your teacher hands you a clear liquid and asks you to classify it. you …
B
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b equipment, measurement & glassware - whats the general rule for takin…
Top Left: 30 mL Top Middle: 22 mL Top Right: 18 mL Bottom Left: 3.0 mL Bottom Middle: 50 mL Bottom Right: 75 mL (Note: The general rule for taking measurements with glassware (lik…
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32/50 which element is the least reactive? c ne li b
Ne (Neon) is the least reactive element among the given options (C, Ne, Li, B).
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in a chemical equation, is it true that : the reactant side and product…
The correct option is the third one: "the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made"
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use the model provided to select all of the examples of mixtures. a ice…
A. iced tea, B. salt water, D. orange juice
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what is the general reaction scheme for a double replacement reaction? …
A. \( AB + CD ightarrow CB + AD \)
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matter can it be physically separated? pure substances can it be chemic…
A. iced tea, B. salt water, D. orange juice
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12/10 the reactants are on the left side of the chemical equation. fals…
True
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what is a valence electron? a type of bond. a popular compound. the # o…
The correct option is the one with "The # of electrons in the last shell." (the fourth option, though labels aren't fully clear, the text "The # of electrons in the last shell" is…
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what is a valence electron? the sum of neutrons and protons. a type of …
The option (assuming the last option's text is "The # of electrons in the last shell"): The # of electrons in the last shell.
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9 multiple choice 1 point one of the most basic and practical precipita…
A. \(NaCl + H_2O ightarrow NaOH + HCl\) ### Question 10
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which reaction type occurs when hydrochloric acid reacts with sodium su…
gas forming reaction ### Second Question (Net Ionic Equation for NaCl and AgNO₃)
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in a covalent bond, one or more electrons are? shared gained lost trans…
A. shared
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3. where are the metalloids located? 4. identify the halogen that has 4…
b. Bromine (Br) ### Question H7.5 - 1
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solutions like steel and bronze are proof that... solutions are always …
B. solutions can be in any state of matter. ### Question 5 (Strong electrolytes)
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in a covalent bond, one or more electrons are? gained lost transferred
None of the options are correct for a covalent bond (covalent bonds involve sharing electrons, while ionic involve transfer). If forced to choose from the given options assuming a…
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17/30 the 3 types of chemical bonds are ________, ________, and _______…
metallic, ionic, covalent
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1 true or false 1 point solutions are formed when multiple pure substan…
False ### Question 2
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3. balance and label reaction types __ $\\ce{c3h8}$ + __ $\\ce{o2}$ $\ …
1. \( 1\ce{C3H8} + 5\ce{O2} ightarrow 3\ce{CO2} + 4\ce{H2O} \) (Combustion) 2. \( 1\ce{N2} + 3\ce{H2} ightarrow 2\ce{NH3} \) (Synthesis) 3. \( 1\ce{Na3(PO4)} + 3\ce{K(OH)} ightarr…
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16/50 what reaction has the following general formula: ab --> a + b com…
Decomposition (the option labeled "Decomposition")
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mixture that does not appear to be evenly mixed throughout: compound a …
B. a heterogeneous mixture (assuming the options are labeled with A, B, C, D where B is "a heterogeneous mixture")
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what type of reaction is the following: bacl₂ + 2ki -> 2kcl + bai₂ opti…
The correct reaction type is Double Replacement (assuming the last option is "Double Replacement" as the reaction \( \text{BaCl}_2 + 2\text{KI} ightarrow 2\text{KCl} + \text{BaI}_…
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1 true or false 1 point pentane, a nonpolar covalent compound, is insol…
True ### Question 2
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at what position on the ph scale can you find acids? number 7 on the ph…
below 7
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all compounds containing group 1a alkali metals are soluble in water. t…
True ### Question 2 (Multiple Choice)
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1 multiple choice 1 point the products of the exchange reaction that oc…
C. \(K_2SO_4\) ### Question 2
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the chemical equation below represents a nuclear reaction.\\(\\ce{_{92}…
D. fission, because the reaction formed lighter nuclei
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configuración electrónica del ion formado por calcio diagrama orbital d…
- Configuración electrónica del ion de calcio: \(1s^2 2s^2 2p^6 3s^2 3p^6\) - Diagrama orbital del ion de calcio: \(1s\) (\(\uparrow\downarrow\)), \(2s\) (\(\uparrow\downarrow\)),…
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1 true or false 1 point electrolytes can be cations or anions. true fal…
True ### Question 2
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1 multiple choice 1 point what type of compound will be most soluble in…
C. polar ### Question 2
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cloro configuración electrónica del átomo neutro diagrama orbital del á…
Configuración electrónica: \(1s^2 2s^2 2p^6 3s^2 3p^5\) Diagrama orbital: - \(1s\): \(\uparrow\downarrow\) - \(2s\): \(\uparrow\downarrow\) - \(2p\): \(\uparrow\downarrow\), \(\up…
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29 multiple choice 1 point what is the balancing coefficient of water, …
B. 4 ### Question 30
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a container holds ( x ) liters of a solution that is 20% ( \text{hno}_3…
\( A = 0.20 \), \( B = 0.50 \), \( C = 3 \)
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calculate the formula mass of sucrose, c₁₂h₂₂o₁₁. periodic table of the…
342.3 amu (corresponding to the option: 342.3 amu)
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27 multiple choice 1 point what is the coefficient for sodium, na, in t…
2 (corresponding to the option "2")
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nutrition labels and glucose it is important to examine the information…
B. Carbon, hydrogen, oxygen
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25 multiple choice 1 point which reaction is an example of a single rep…
\( 2\ce{Na} + \ce{FeCl_{2}} ightarrow 2\ce{NaCl} + \ce{Fe} \) (the second option) ### Question 26
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23 multiple choice 1 point what is the theoretical yield? the actual am…
B. the maximum amount of product that can be produced by the given reaction conditions ### Question 24
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21 multiple choice 1 point coefficients are... the written forms of che…
B. the relative whole numbers of each species involved in a chemical reaction. ### Question 22
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the winds are due to changes in the density of air molecules caused by …
The winds are due to the rotation of Earth on its axis and uneven heating of Earth’s atmosphere causing pressure differences.
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matching. match the term on the left with the statement that best descr…
29. viscosity - the resistance of a liquid to flow 30. luster - a property of metals, also called "shiny" 31. insulator - a material that does not conduct heat or electricity 32. …
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how many molecules are in 4.50 mol of na₂co₃? 7.21*10²⁴ 271 2.71*10²⁴ 2…
$\boldsymbol{2.71\times 10^{24}}$ (corresponding to the option "2.71*10²⁴") ### Second Question (Actual Yield of $\boldsymbol{\ce{H2O}}$)
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what is the molar ratio between h₂ and o₂ in the balanced chemical equa…
2:1 ### Second Question (Definition of Molar Ratio)
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15 multiple choice 1 point what is avogadro’s number? ○ 6.022*10¹¹ ○ 23…
D. \( 6.022^{*}10^{23} \) ### Question 16 (How many grams are in one mole of copper?)
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which statement below best explains how the energy transfer within eart…
The option "Electromagnetic waves transfer heat and light energy to molecules in the air through radiation, which affects air temperature." (the third option in the list)
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matching. match the term on the left with the statement that best descr…
24. thixotropic - a non - Newtonian fluid that becomes more liquid when a force is applied 25. solid - a substance that has definite shape and definite volume, good to build with …
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12 multiple choice 1 point how many \things\ are in one mole? 1 gram 1 …
D. \(6.022^{*}10^{23}\) (assuming D is the identifier for this option, adjust identifier if needed) ### Question 13
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10 multiple choice 1 point what is the purpose of an arrow in a chemica…
C. to denote the direction of the chemical reaction ### Question 11
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matching. match the term on the left with the statement that best descr…
20. saturation - the limit of how much solute can be dissolved 21. solute - the part of the solution that gets dissolved, usually a solid 22. solution - a solute plus a solvent, a…
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9 multiple choice 1 point calculate the molecular mass of caffeine. c₈h…
194.19 amu (corresponding to the option with 194.19 amu)
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7 multiple choice 1 point calculate the molecular mass of caco₃. period…
100.08 amu (the option with "100.08 amu")
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what type of chemical reaction requires an organic compound and oxygen …
B. combustion
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4 multiple choice 1 point calculate the atomic mass of silver sulfate, …
311.86 amu (the first option) ### Question 5
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configuración electrónica del ion formado por nitrógeno. diagrama orbit…
Configuración electrónica del ion de nitrógeno ($N^{3 -}$): $1s^2 2s^2 2p^6$ Diagrama orbital: $1s$ ($\uparrow \downarrow$), $2s$ ($\uparrow \downarrow$), $2p$ (tres orbitales con…
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according to this image, which letter depicts a coefficient?\ $\\ce{ch_…
B
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1. identify the limiting reactant when 1.00 g of si reacts with 0.75 g …
Si (the option "Si") ### Question 2 (Identifying Reaction Type)
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20 multiple choice 1 point aspirin is a common medicine to treat pain r…
60% (the option with "60%")
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18 multiple choice 1 point hydrochloric acid hcl is intense and can bur…
$4.2\times 10^{23}$ molecules (corresponding to the first option) ### Question 19 (Subfield: Chemistry)
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consider the decomposition of hydrogen peroxide. complete the chemical …
C. 1 molecule of \(H_2O\)
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when kim added 30 g of hydrochloric acid (hcl) to 65 g of zn, bubbles a…
B. 2 g of hydrogen gas were produced
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16 multiple choice 1 point if there are 5 moles of sodium and 8 moles o…
D. Na (assuming the options are ordered as given: NaCl, none of these, Cl₂, Na) ### Question 17
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perty do the following elements have in common? dine, and magnesium a s…
A. Same phase at room temperature
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46. how can you grow many, small crystals? ○ grow the crystals cold ○ g…
D. grow the crystals fast ### Question 47
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der the elements in the periodic table. the stair - step line between t…
B. metals, nonmetals
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43. which one of these is not a way to form crystals? - cooling a liqui…
The option "warming a solid until it melts" is not a way to form crystals. So the correct option is the one with "warming a solid until it melts". ### Question 44
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14 multiple choice 1 point coefficients can be represented as... ○ elem…
C. whole numbers ### Question 15
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matching. match the term on the left with the statement that best descr…
6. slip plane - an area in a crystal where atoms can slide past each other 7. unit cell - the smallest repeating unit of crystalline formation 8. metalloid - elements along the st…
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12 multiple choice 1 point chemical equations always include an arrow s…
A. the direction of the reaction. ### Question 13
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10 multiple choice 1 point calcium carbonate decomposes into calcium ox…
B. 95% ### Question 11
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which process is primarily responsible for the formation of the himalay…
A. Convergent plate boundary movement ### Second Question:
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8 multiple choice 1 point a solution of nickel sulfide (nis) with a mas…
6.8g NiS (Option: 6.8g NiS) ### Question 9
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5 multiple choice 1 point potassium oxide (k₂o) is often used in agricu…
A. \( 4\text{K} + \text{O}_2 ightarrow 2\text{K}_2\text{O} \) ### Question 6
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art 1 sculpture/ceramics midterm final exam part 1 color scheme that us…
B. Complementary colors (assuming the options are labeled with letters, but based on the content, the correct option text is "Complementary colors")
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drag each poetic element and structural feature to the first column if …
### Poetic Elements Found in "The Path to Home" - is a narrative poem - uses stanzas - uses a predictable rhythm - relies on alliteration ### Poetic Elements NOT Found in "The Pat…
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one mole is equivalent to... 5.022 x 10²³ atoms. 6.2 x 10²³ atoms. 0.62…
D. \( 6.022 \times 10^{23} \) atoms. ### Second Question (Balancing Chemical Equation)
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a word that describes shapes and forms that have curved edges and simil…
A. Organic
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1 multiple choice 1 point the ______ is a unit of measure for the numbe…
A. mole ### Question 2
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1 multiple choice 1 point which is not a type of yield? ○ percent ○ the…
C. limiting reactant ### Question 2
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oxígeno configuración electrónica del átomo neutro diagrama orbital del…
Configuración electrónica: \(1s^2 2s^2 2p^4\) Diagrama orbital: \(1s\) (\(\uparrow\downarrow\)), \(2s\) (\(\uparrow\downarrow\)), \(2p\) (uno con \(\uparrow\downarrow\), dos con \…
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predict the products of the following combination reaction. $c(s) + o_2…
\(CO_2\) ### Question 2 (Single Replacement Reaction Formula)
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art 1 sculpture/ceramics midterm final exam part 1 color scheme involvi…
C. Analogous
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15) what is the pressure of 1.20 mol of gas in a 10.0 l container at 31…
The pressure is approximately \( \boldsymbol{3.05 \, \text{atm}} \) (or adjust based on exact \( V \) and \( T \) precision).
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roman numeral indicates the combining capacity for polyvalent elements …
The chemical formulas are written using the crisscross method to balance the charges of cations (metals) and polyatomic anions. For example: - Magnesium dichromate: $\text{MgCr}_2…
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1 multiple choice 1 point what are the units of molar mass? grams molec…
C. g/mol ### Question 2
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write the compound name for the following formulas. * = polyvalent 1. m…
1. Magnesium Chromate 2. Potassium Bicarbonate 3. Lead(II) Carbonate 4. Calcium Nitrate 5. Nickel(II) Bicarbonate 6. Silver Phosphate 7. Zinc Nitrate 8. Iron(III) Chromate 9. Magn…
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1 what is the balancing coefficient of o₂ in the following equation? ch…
The option with "2" (the last option, assuming the options are 1,4,3,2 in order). So if the options are: 1, 4, 3, 2, then the answer is 2 (the fourth option, but need to check the…
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1 true or false 1 point the formula mass of a compound is the sum of th…
True ### Question 2
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configuración electrónica del ion formado por nitrógeno. diagrama orbit…
Configuración electrónica del ion \(N^{3-}\): \(1s^2 2s^2 2p^6\) Diagrama orbital: \(1s\) con \(\uparrow\downarrow\), \(2s\) con \(\uparrow\downarrow\), \(2p\) con tres orbitales …
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1 true or false 1 point a product is a substance which is generated as …
True ### Question 2
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nitrogeno configuración electrónica del átomo neutro 1s² diagrama orbit…
La configuración electrónica completa del átomo de nitrógeno (átomo neutro) es $\boldsymbol{1s^2 2s^2 2p^3}$.
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generators change ------ energy to ------ energy. options: mechanical t…
mechanical to electrical