Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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multiple choice 2 points which of the following statements correctly pe…
B. They rotate the plane of polarized light by exactly the same amount and in opposite directions.
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29 multiple choice 2 points which of the following are acceptable fisch…
A. II only
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multiple choice 2 points identify if the given pair of molecules are co…
B. Stereoisomers
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multiple choice 2 points which of the following conditions can lead to …
B. The compound is symmetric.
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25 multiple choice 2 points which of the following best defines chirali…
The property of a molecule being non - superimposable on its mirror image.
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how many diastereomers are there of the molecule shown below? previous
3
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multiple choice 2 points identify each of the given pairs as either con…
A. (a) Identical compounds (b) Enantiomers
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multiple choice 2 points what is a chiral center in organic chemistry? …
C. A carbon atom bound to four different groups.
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20 multiple choice 2 points (s)-2 - chloropentane has a specific rotati…
(i) [Appropriate 3 - D structure of (S)-2 - chloropentane as shown in the correct option] (ii) - 34.07° (iii) %R = 31.70%; %S = 68.30%
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19 multiple choice 2 points explain the relation between absolute confi…
The fourth option: There isn't any relation of R and S with (+) and (-). If the R isomer of any compound is dextrorotatory (+) then the S isomer could be either dextrorotatory or …
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sat oct 4 quiz multiple choice 2 points consider the molecule shown her…
No options are provided in the question to choose from. However, if we analyze the statements: i. If the mirror - image of a molecule is superimposable, the molecule is achiral. i…
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what is a cation? a a molecule that contains two or more elements. b a …
C. A positively charged ion.
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17 multiple choice 2 points for each of the following compounds, draw a…
B. a. Optically active; b. Optically inactive
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16 multiple choice 2 points if (s)-glyceraldehyde has a specific rotati…
B. +8.7°
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15 multiple choice 2 points what term describes the structural relation…
A. constitutional isomers
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transform the structural formulas below into fischer projection formula…
The correct Fischer - projection formulas are the ones in the first set of options (top - most set of Fischer - projection attempts): A. For the first structure: - Vertical bonds …
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multiple choice 2 points what term describes the structural relationshi…
A. constitutional isomers
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use the following three structures to answer th question below. the rel…
C. constitutional isomers
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predict the specific rotation of the compound shown. zero; the compound…
A. Zero; the compound is achiral.
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10 multiple choice 2 points the boiling point of s - 2 - butanol is 99°…
B. 99°C
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multiple choice 2 points a substance has a specific rotation of -40.00°…
B. % of the (+)-enantiomer = 26.8%, % of the (-)-enantiomer = 73.2%
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multiple choice 2 points which of the following terms best describes th…
D. enantiomers
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multiple choice 2 points use the following three structures to answer t…
same compound
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multiple choice 2 points which of the statements below correctly descri…
The molecule might be a meso form.
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multiple choice 2 points draw structures consistent with the names give…
a. A b. B c. Information about option C is incomplete in the provided image, so cannot be determined from the given content.
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multiple choice 2 points which of the following is a characteristic of …
C. They have two or more chiral centers but are overall achiral.
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multiple choice 2 points how many asymmetric carbon atoms are present i…
B. 2
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multiple choice 2 points which of the following terms best describes th…
A. constitutional isomers
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1 multiple answer 2 points the 50/50 mixture of the two compounds below…
C. chiral
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question 3 of 3 in a redox reaction, the oxidizing agent is gaining ele…
True
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a chemist has 500 ml of a 30% acid solution. she adds x milliliters of …
The horizontal asymptote $y = 10$ means that the final concentration will always be greater than 10%.
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multiple select question select all that apply select all of the follow…
A. Acetylcholine C. Norepinephrine
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lesson 5 food. in what way(s) did teddy roosevelt improve public health…
1. D. All of the above 2. D. World War I shifted national focus away from domestic reforms.
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question 16 (multiple choice worth 3 points) (01.08r mc) which of the f…
The nation's government promotes terrorist activities.
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current attempt in progress which one of the following orbitals is the …
E. 4d
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which one of the following orbitals has the greatest number of nodes? 4…
C. $5p$
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current attempt in progress which one of the following terms describes …
The azimuthal quantum number
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a sample of 2.416 grams of a compound containing carbon and hydrogen re…
(a) C = 1.927 g; H = 0.486 g (b) No (c) C = 79.76%; H = 20.11% (d) CH₃
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question 10 - 1 point the molecular mass of water (h₂o) is 18.02 amu. w…
18.02 g/mol
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question 9 · 1 point is the following reaction endothermic or exothermi…
A. endothermic
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molybdenum(iv) oxide can be prepared by reaction of molybdenum(vi) oxid…
Theoretical yield = 357.1 g Percentage yield = 88.6%
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question 8 · 1 point balance the following equation: x₂ + y₂ → xy₃ sele…
C. $\text{X}_2 + 3\text{Y}_2\longrightarrow2\text{XY}_3$
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calcium nitride (ca3n2) reacts with water to produce ammonia (nh3). cal…
$15.4$
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question 7 · 1 point is the following reaction endothermic or exothermi…
B. exothermic
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question 6 - 1 point what is the stoichiometric factor between n₂ and n…
A. 1 N₂ : 2 NO
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benzene (c₆h₆) is a liquid with a density of 0.874 g/cm³. it reacts wit…
$85.4$
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question 5 · 1 point which is a neutralization reaction? select the cor…
HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)
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pentasilane (si₅h₁₂) is a liquid with a density of 0.827 g/cm³. it reac…
$19.9\ g$ (rounded to one decimal place)
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question 4 · 1 point balance the following equation: h₂o₂ → h₂o + o₂ se…
B. $2\mathrm{H}_{2}\mathrm{O}_{2}\longrightarrow 2\mathrm{H}_{2}\mathrm{O}+\mathrm{O}_{2}$
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calculate the mass percentage of oxygen in a mixture that contains 179 …
53.8%
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question 3 · 1 point in the chemical equation 2 a + 3 b → c + 4 d, how …
C. 3 molecules
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how many moles of retinol (c₂₀h₃₀o), a form of vitamin a, are in a 0.12…
A. $4.36\times 10^{-4}\text{ mol}$
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sodium chloride is also known as table salt. the chemical formula of so…
B. 58.44 g/mol
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the amino acid serine has the molecular formula c₃h₇no₃, and the amino …
0.958
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question is the following process endothermic or exothermic? h₂o(g) → h…
B. exothermic
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question in an endothermic reaction, do the reactants or the products h…
the products
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a 18.72 g sample of copper is heated in the presence of excess chlorine…
$CuCl$
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is the following process endothermic or exothermic? h₂o(l) → h₂o(s) sel…
exothermic
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question this is the reaction that happens inside of a hot pack found i…
exothermic
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a 7.044 - gram sample of an organic compound containing c, h and o is a…
Empirical formula: $CH_2O$ Molecular formula: $C_2H_4O_2$
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according to the following reaction, if five moles of oxygen were to re…
10
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what is true about the following reaction? a + b → ab select the correc…
D. all of the above
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it is desired to produce 9.32 grams of phosphoric acid by the following…
3.56
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question coefficients in a chemical formula provide: select the correct…
the relative numbers of products and reactants
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for the following reaction, 6.50 grams of sulfur dioxide are mixed with…
Theoretical yield = $8.33$ g Percent yield = $84.9\%$
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question the ratio of the coefficients of two substances in a balanced …
A. stoichiometric factor
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according to the following reaction, how many grams of zinc hydroxide a…
32.4
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according to the following reaction, how many moles of ammonium nitrite…
$0.349$ moles (rounded to three significant figures)
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what type of subshell would have the orbital in the picture? p - subshe…
A. p - subshell
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when the following molecular equation is balanced using the smallest po…
$2$; $1$; $1$; $2$
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a compound is found to contain 31.14 % sulfur and 68.86 % chlorine by w…
SCl₂
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what type of subshell would have the orbital in the picture? p - subshe…
# Brief[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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a compound is found to contain 31.14 % sulfur and 68.86 % chlorine by w…
SCl₂
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a compound is found to contain 31.14 % sulfur and 68.86 % chlorine by w…
# Ex[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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calculate the percentage composition for c₄h₁₀o. (enter your answer to …
C: 64.79% H: 13.62% O: 21.58%
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list the following elements in increasing metallic character. barium ca…
Cl<P<Zn<Ca<Ba
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1. how many molecules of sulfur hexafluoride are present in 6.22 grams …
1. $2.57\times 10^{22}$ molecules 2. $13.4$ g
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list the following elements in increasing first ionization energy. bari…
Ba<Ca<Zn<P<Cl
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complete the table below for calculating the molar mass of the compound…
The molar mass of carbon tetrafluoride ($CF_4$) is $88.01\ g/mol$.
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3.51 g previous answers correct correct answer is shown. your answer 3.…
85.5% (assuming actual yield of 3.00 g. You need to substitute the actual yield value given in the full - context problem to get the accurate answer)
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of pbcl₂ produced from complete consumption of pb(no₃)₂: theoretical yi…
If the actual yield is $2.80$ g, the percent - yield is $79.8\%$ (you need to substitute the actual yield value you have to get the correct answer).
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and the number of moles of pbcl2 produced from the complete reaction of…
$3.50\ g$
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a sample of bromine contains 45.3 grams. 1. how many moles of br atoms …
1. 0.567 mol Br 2. 0.2835 mol $Br_2$
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missed this? watch kcv: reaction stoichiometry, we: limiting reactant a…
$Pb(NO_3)_2$
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what is the molarity of zncl2 that forms when 20.0 g of zinc completely…
1.07
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part a to what volume should you dilute 55 ml of a 14 m stock hno₃ solu…
$5.7\ L$
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part a if 3.00 l of a 5.20 m mgbr₂ solution is diluted to 39.0 l, what …
$0.400$
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1. what is the mass of 1.28×10^24 atoms of zinc? grams 2. how many zinc…
1. $139$ 2. $1.95\times 10^{23}$
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if 251 ml of a 2.25 m sucrose solution is diluted to 750.0 ml, what is …
$0.753$
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1. what is the mass of 1.57×10^24 atoms of barium? grams 2. how many ba…
1. 358 grams 2. $1.01\times 10^{23}$ atoms
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homework 5 exercise 5.33 - enhanced - with expanded hints 8 of 14 missi…
189 g
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missed this? watch kcv: solution concentration, we: using molarity in c…
$252\ g$
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missed this? watch kcv: solution concentration, we: using molarity in c…
122 g
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list the following elements in increasing atomic radii. barium calcium …
C. Cl<P<Zn<Ca<Ba
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1. how many moles of be are there in a sample that contains 3.27×10^22 …
1. $0.0543$ mol 2. $1.84\times 10^{24}$ atoms
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0.400 m albr3 express your answer with the appropriate units. br^- = va…
$1.20\ M$
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question 1 match the ion to the noble gas element it is isoelectronic t…
carbide: Ne phosphide: Ar potassium ion: Ar strontium ion: Kr beryllium ion: He
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match the element to the number of valence electrons. al choose ca choo…
Al - 3 Ca - 2 F - 7 Br - 7 B - 3 Antimony - 5 potassium - 1 argon - 8
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consider that the mass of o in the sample must be the difference betwee…
$0.0136$
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what is the electron configuration for titanium? kr 4p^6, 3d^8 1s^2, 2s…
For the electron - configuration of titanium: 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d² For the electron - configuration of iodine: [Kr] 4d¹⁰, 5s², 5p⁵