Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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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
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during the analysis, 0.163 g h₂o and 0.600 g co₂ are produced. calculat…
0.0136 mol
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during the analysis, 0.00905 mol h₂o is formed. calculate the amount (m…
0.0181
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during the analysis, 0.163 g h₂o and 0.600 g co₂ are produced. calculat…
$0.00905$
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which orbital diagram has the correct placement for 21 electrons. ○ 3d↑…
The second option (where \(3d\) has one electron with spin - up, \(4s\) is filled with 2 electrons, \(3p\) is filled with 6 electrons, \(3s\) is filled with 2 electrons, \(2p\) is…
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0.400 m kbr express your answer with the appropriate units. br⁻ = value…
Part A: [Br⁻]=0.400 M Part B: [Br⁻]=0.380 M
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15.77 mg libr in 198.6 ml of solution. express the molarity in moles pe…
$9.144\times10^{-4}$
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current attempt in progress list all the valid sets of quantum numbers …
$(4,1, - 1,+\frac{1}{2}),(4,1, - 1,-\frac{1}{2}),(4,1,0,+\frac{1}{2}),(4,1,0,-\frac{1}{2}),(4,1,1,+\frac{1}{2}),(4,1,1,-\frac{1}{2})$
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which 2p subshell has the electrons properly placed? ○ 2p ↑↑ ↑↑ ↑ ○ 2p …
The option with three single - occupied 2p orbitals and electrons having parallel spins (the last option among the ones shown in the typical visual representation where arrows are…
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which 2p subshell has the electrons properly placed? 2p ↑↑ ↑↑ ↑ 2p ↑↓ ↑…
The option with electrons filling each of the three 2p orbitals singly with parallel spins (e.g., arrows all pointing up) before any pairing is the correct one. Among the given op…
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part a 0.45 mol of na2so4 in 7.36 l of solution express the molarity in…
Part A: 0.061 M Part B: 0.389 M
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complete the table | fill - in order | subshell | | ---- | ---- | | 9th…
| Fill - in order | Subshell | | ---- | ---- | | 9th | 5s | | 8th | 4p | | 7th | 3d | | 6th | 4s | | 5th | 3p | | 4th | 3s | | 3rd | 2p | | 2nd | 2s | | 1st | 1s |
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question 5 helium is in group 18 which is part of the \p block\. why is…
Helium can not have more than two electrons.
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question 3 0.2 pts a column in the periodic table is called a \group\ h…
Question 3: 10 Question 4: 14
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question 1 0.2 pts a column in the periodic table is called a \group\ h…
Question 1: 6 Question 2: 6
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atoms, are organized into elements on the periodic table. elements are …
halogens
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drag and drop the words or phrases that accurately complete the summary…
First blank: valence Second blank: properties Third blank: families
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question 1 1 pts indicate if the subshell is possible. 2s choose 3f cho…
2s: possible 3f: not possible 4d: possible 2d: not possible
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part a 0.45 mol of na₂so₄ in 7.36 l of solution express the molarity in…
Part A: 0.061 M Part B: 0.390 M
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missed this? watch kcv: limiting reactant, theoretical yield, and perce…
$57.9\%$
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which of the following elements can be described as having two valence …
E. Ba
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which group does an atom with four valence electrons belong to on the p…
Group 14
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which of the following statements describe the atoms valence electron c…
The valence electrons are found on the outermost ring of electrons.
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determine the limiting reactant for the reaction. mg(s) o2(g) mgo(s) pr…
We need the mass of $Mg$ (or number of moles of $Mg$) to give a numerical answer. If the number of moles of $Mg$ is $n_{Mg}$, the theoretical yield $m = 40.31n_{Mg}\ g$.
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0.230 g al and 1.20 g cl₂. express your answer using three significant …
$1.14$
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2.0 g al and 2.0 g cl2 express your answer using two significant figure…
Part A: $m = 2.5\ g$ Part B: $m = 31.3\ g$
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missed this? watch kcv: limiting reactant, theoretical yield, and perce…
28.0 mol
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part a 5 mol mn and 5 mol o₂ express your answer using one significant …
Part A: 5 mol Part B: 5 mol
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when using atwater factors to determine the amount of calories from car…
fiber cannot be broken down in the body, so it is not used for energy
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a scientist would compare data collected with a bomb calorimeter to acc…
calculating the percent difference between the data collected and data on a nutrition label
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the ____ must be collected in order to determine the caloric content of…
change in water temperature
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monosaccharides are the smallest building blocks of sugars and have sim…
B. $C_m(H_2O)_n$
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a bomb calorimeter is used to measure ______ in reactions that occur in…
energy changes
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during the analysis, 0.163 g h₂o and 0.600 g co₂ are produced. calculat…
$0.00905$
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tutor step complete consumption of br₂ yields 0.214 mol of brcl. calcul…
$24.7$
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given that 0.107 mol br2 was consumed, calculate the amount (mol) brcl …
0.214
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the entire mass, 17.12 g, of the reactant br₂ is consumed by the reacti…
$0.1071\ mol$
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the input in a chemical reaction that is changed is called the product …
C. reactant
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the theoretical yield of a reaction is the amount of product obtained i…
$10.57\ g$