Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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14. which statement about li is true when it forms an ion? a. it gains …
14. D. It loses one electron 15. A. Attract electrons in a chemical bond 16. A. Barium (Ba) 17. A. \(2+\) 18. D. Calcium (Ca) 19. A. Gamma rays 20. B. Outermost energy level 21. A…
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what unit is the molar mass typically expressed in? grams per mole (g/m…
grams per mole ($g/mol$)
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what is the result of 2.00 moles × 18.02 g/mol? 36.04 grams 2.00 grams …
36.04 grams
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identify the charge of the ions in each compound, then type the formula…
For Silver (II) oxide: \( Ag \) charge is \( 2+ \), \( O \) charge is \( 2 - \), formula is \( AgO \). For Silver (I) chloride: \( Ag \) charge is \( 1+ \), \( Cl \) charge is \( …
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if a compounds formula is c₆h₁₂o₆, how many oxygen atoms are in one mol…
6
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identify the charge of the ions in each compound, then type the formula…
Lead (IV) nitride: \(Pb^{4+}\), \(N^{3 -}\), \(Pb_3N_4\); Copper (III) bromide: \(Cu^{3+}\), \(Br^{1 -}\), \(CuBr_3\)
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identify the charge of the ions in each compound, then type the formula…
- For \(Na\): \(1+\) - For \(PO_4\): \(3-\) - Formula for sodium phosphate: \(Na_3PO_4\) - For \(Ca\): \(2+\) - For \(SO_4\): \(2-\) - Formula for calcium sulfate: \(CaSO_4\)
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identify the charge of the ions in each compound, then type the formula…
For calcium sulfide: \(Ca^{2+}\), \(S^{2 -}\), \(CaS\); For aluminum nitride: \(Al^{3+}\), \(N^{3 -}\), \(AlN\)
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identify the charge of the ions in each compound, then type the formula…
Li: $1+$, N: $3-$, formula of lithium nitride: $Li_3N$; Be: $2+$, Br: $1-$, formula of beryllium bromide: $BeBr_2$
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explain the difference between a molecular formula, a structural formul…
- Molecular formula: The formula lists the type and number of each atom in a compound. - Structural formula: The formula shows the type and number of each atom and how the atoms a…
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part a what is the difference between saturated and unsaturated hydroca…
Saturated hydrocarbons contain only single bonds, unsaturated hydrocarbons contain double and triple bonds.
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part a explain the difference between n - alkanes and branched alkanes …
The n - alkanes have all carbon atoms bonded in a straight chain, whereas the branched alkanes have branches of carbon atoms coming off a main straight chain of carbon atoms.
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what are isomers? isomers are compounds with the same number of carbon …
For the first question: Isomers are compounds with the same exact chemical formula, but they have completely different structures. For the second question: Butane and isobutane.
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what is the mole ratio of mg to mgcl₂? mg(s) + hcl(aq) → mgcl₂(aq) + h₂…
$1\space mol\space Mg/1\space mol\space MgCl_2$ (the third option)
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what are alkynes? o alkynes are hydrocarbons that cant contain double b…
For the first question: C. Alkynes are hydrocarbons that contain at least one triple bond between carbon atoms. For the second question: B. Alkynes are hydrocarbons that contain a…
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in the reaction 2h₂(g)+o₂(g) --> 2h₂o(g), what is the mole ratio of o₂ …
1:2
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in the equation 2 al2o3 --> 4 al + 3 o2, what is the mole ratio of alum…
\(4:3\)
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neutral atom ion with a charge of -1 ion with a charge of +2 atom with …
Neutral atom: B. Ion with a charge of - 1: A. Ion with a charge of + 2: D. Atom with a mass number of 3: C.
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what are alkenes? alkenes are hydrocarbons that contain only two carbon…
First question: Alkenes are hydrocarbons that contain at least one double bond between carbon atoms. Second question: Alkenes are hydrocarbons that contain at least one double bon…
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what is the molar mass of nitrogen (n)? 14.01 g/mol 68.17 g/mol 1.01 g/…
14.01 g/mol
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consider the following reversible reaction. 2h₂o(g) ⇌ 2h₂(g) + o₂(g) wh…
\(K_{eq}=\frac{[H_2]^2[O_2]}{[H_2O]^2}\) (the last option)
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n₂ + 3h₂ --> 2nh₃ how many moles of hydrogen are needed to react with 2…
6
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reversible reactions and equilibrium pre - test complete 1 2 3 4 5 6 co…
\(K_{eq}=\frac{[C]^c[D]^d}{[A]^a[B]^b}\) (the fourth option in the given choices)
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each has a specific number of in its. when the number of protons the nu…
element, protons, nucleus, equals, electrons, neutral, add, neutrons
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question 9 6 pts brønsted and lowry defined an acid as a(n) o electron …
Question 9: proton donor. Question 10: proton acceptor.
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arrhenius defined an acid as a substance whose aqueous solution contain…
For the first question (about acid): hydrogen ion. For the second question (about base): hydroxide ion.
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question 5 6 pts in a basic solution the concentration of hydronium ion…
concentration of hydroxide ion is greater than that of hydronium ion. # Question 6
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question 3 the hydroxide ion is responsible for the properties of acids…
- Question 3: B. bases - Question 4: A. concentration of hydronium ion is greater than that of hydroxide ion
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in the following reaction, ch₃nh₂ + h₂o→ch₃nh₃⁺ + oh⁻ the compound ch₃n…
- First question: a base - Second question: acids
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match each human condition with the system or chemical that has failed …
- Diarrhea - digestive system - Hypothermia - nervous system - Low blood oxygen - respiratory system
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this part insulates the reaction chamber from the transfer of heat to o…
A. Thermometer, B. Outer cup, C. Inner cup
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jena is doing research for a presentation about pesticides in the fruit…
a university site showing the results of a study on which foods absorb chemicals
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5) when sodium metal reacts with iron (ii) chloride, iron metal and sod…
7. Aqueous aluminium sulfate reacts with aqueous calcium hydroxide to produce solid aluminium hydroxide and solid calcium sulfate. 8. Aqueous calcium hydroxide reacts with gaseous…
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how does this acid cause a battery to work? describe how acids and base…
They help keep our body's pH balanced.
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which of the following describes a drug target? a. the molecule to whic…
A. The molecule to which a drug binds
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which refers to the amount of heat required to change the temperature o…
Specific heat
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enhancing a presentation with multimedia quiz complete 1 2 3 4 5 6 7 8 …
On average, 83 million people are added to the world's population every year.
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for each of the following, write an unbalanced chemical reaction equati…
1. \(BeCl_{2}(aq)+AgNO_{3}(aq) ightarrow Be(NO_{3})_{2}(aq)+AgCl(s)\) 2. \(C_{3}H_{8}O(l)+O_{2}(g) ightarrow CO_{2}(g)+H_{2}O(g)\) 3. \(NaOH(aq)+H_{2}SO_{4}(aq) ightarrow Na_{2}SO…
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enhancing a presentation with multimedia quiz complete 1 jena is doing …
a university site showing the results of a study on which foods absorb chemicals
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7. based on the $r_f$ values of samples a and b, which sample is more a…
Sample A has a higher retention factor than Sample B, so it is more attracted to the mobile phase.
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6. how many $r_f$ values should you calculate for sample c? you should …
You should calculate 2 \(R_f\) values, one value for each spot visible on the chromatograph.
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5. sample c gave two spots on the paper chromatogram. what does this te…
Sample C is a mixture of two different substances.
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4. calculate the $r_{f}$ value for sample b using the diagram below.
\(0.56\)
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3. calculate the $r_f$ value for sample a using the diagram below. figu…
The \(R_f\) value for Sample A is approximately \(0.71\)
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part c: draw a correct lewis structure for co₂.
\(O = C = O\) (with each oxygen having 2 lone pairs)
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in shakespeares hamlet, what plot event causes ophelias mental decline?…
Polonius's violent death
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integrating multiple sources of information determine which multimedia …
- a quote from an interview with a scientist - a portrait of a chemist in a lab - a set of statistics about water pollution - a line graph - an explanation of agricultural water d…
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match the word with its definition. energy work kinetic energy potentia…
Energy - The capacity to do work. Work - The transfer of energy to an object by a force that causes the object to move in the direction of that force. Kinetic Energy - The energy …
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objective: students will understand the concept of covalent bonding (th…
Carbon forms two double covalent bonds in \(CO_2\) to achieve a stable octet (8 valence electrons). Carbon has 4 valence electrons. Each double bond (\(C = O\)) shares 4 electrons…
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let us try to balance the following chemical equation - fe + h₂o → fe₃o…
The un - balanced equation \(Fe + H_2O ightarrow Fe_3O_4 + H_2\) is balanced as \(3Fe + 4H_2O ightarrow Fe_3O_4 + 4H_2\)
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classify these solvents as either protic or aprotic solvents. protic ap…
- Protic: \( H_2O \), \( CH_3OH \), \( CH_3CH_2OH \), acetic acid - Aprotic: acetone, DMF, DMSO, acetonitrile
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if a solid line represents a covalent bond and a dotted line represents…
\(H_3N\cdots H - O - H\)
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select the iupac name for the ether. the iupac name is: o ethoxy-2-brom…
2 - bromo - 1 - ethoxypropane
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select the iupac name for the ether. the iupac name is: ○ ethyl 2 - met…
1 - ethoxy - 2 - methylpropane
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select the common name for the ether. the common name is: ○ ethyloxy cy…
cyclopentyl ethyl ether
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what is the iupac name for the compound shown? © macmillan learning
1,2 - Propanediol
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what is the iupac name for the compound shown?
2 - Bromocyclopentanol
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balance the following chemical equations. 1) cac₂ + ______ h₂o → c₂h₂ +…
1. \(CaC_{2}+2H_{2}O = C_{2}H_{2}+Ca(OH)_{2}\) 2. \(3Ca(OH)_{2}+2H_{3}PO_{4}=Ca_{3}(PO_{4})_{2}+6H_{2}O\) 3. \(SrCO_{3}+2NH_{4}Br = SrBr_{2}+(NH_{4})_{2}CO_{3}\) 4. \(C_{7}H_{16}+…
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considered the first modern chemist * nicolaus copernicus galileo galil…
- Considered the first modern chemist: Robert Boyle - Published the first heliocentric theory: Nicolaus Copernicus
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take quiz exit question 16 1 pts which term refers to the volume of ins…
- Question 16: alveolar ventilation - Question 17: carbonic acid - Question 18: medullary rhythmicity area
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when water freezes, it changes to ice. is this a chemical reaction? why…
When water freezes to ice, it is not a chemical reaction. Because the chemical composition (\(H_2O\)) remains unchanged. To tell if a change is caused by a chemical reaction, look…
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activity: periodic table use each clue below to determine the identity …
1. Gold 2. Fluorine 3. Magnesium 4. Potassium 5. Nitrogen 6. Aluminium 7. Argon 8. Phosphorus 9. Francium 10. Helium 11. Hydrogen 12. Sulfur 13. Germanium 14. Lanthanum 15. Mercur…
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ch₄ + 2o₂ → co₂ + 2h₂o c = h = o = c = h = o =
Left side: \(C = 1\), \(H = 4\), \(O = 4\). Right side: \(C = 1\), \(H = 4\), \(O = 4\).
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2h₂ + o₂ → 2h₂o tells you the amount of tells you the amount of 2h₂ two…
The left - side arrow (pointing to the coefficient in \(2H_{2}\)) tells you the amount of molecules. The right - side arrow (pointing to the subscript in \(H_{2}O\)) tells you the…
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the law of conservation of mass states that matter cannot be nor reacta…
- The Law of Conservation of Mass: created, destroyed - Reactants: starts - Products: ends - In \(2H_2 + O_2 ightarrow2H_2O\): \(2H_2\) and \(O_2\) (reactants), \(2H_2O\) (product)
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question 1 1 pts the sensors that provide feedback information to the m…
- Question 1: central chemoreceptors and peripheral chemoreceptors. - Question 2: vital capacity. - Question 3: transpulmonary pressure.
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the rock cycle a volcano on a remote island erupts. lava flows over the…
B. The igneous rock will be weathered and form sedimentary rock.
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questions and problems q5 a 15.0 - ml sample of nacl solution has a mas…
a. \(20.7\%\) b. \(21.7\%\) c. \(3.72\space M\)
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use the drop - down menus to complete the sentences describing what hap…
The kinetic energy of the molecules increases. The speed of the molecules increases. The density of the fluid decreases.
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molecules→moles 1. how many moles are in 2.78 x 10^33 molecules of kryp…
1. Approximately $4.62\times10^{14}$ mol 2. Approximately $1.93\times10^{24}$ molecules 3. Approximately $2.74\times10^{-6}$ mol Moles $\to$ Grams 1: Approximately $1812.12$ g Mol…
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1.5 time to review and reflect: states of matte 20 total points directi…
They vibrate more and push slightly apart
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question 2 which statement best describes the motion of gas particles? …
- **Question 2**: They move quickly in all directions and are far apart - **Question 3**: The particles move faster and take up more space
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answer the following questions based on the observations you made about…
In solids, closely - packed particles give high density. In gases, widely - spaced particles result in low density. Density (mass/volume) depends on particle spacing: closer spaci…
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carbon monoxide (28.01 g/mol) is used in refining iron(iii) oxide (159.…
e) \(CO\)
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page 2: what is the limiting reagent if 76.4 grams of c2h3br3 were reac…
\(C_2H_3Br_3\)
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practice molecule lewis structure does it contain polar bonds? is the m…
| Molecule | Lewis structure | Does it contain polar bonds? | Is the molecule polar? | Intermolecular Forces present | |---|---|---|---|---| | \(PCl_{3}\) | Central \(P\) with thr…
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question 2 select oxygen and match the following observations for each …
- Solid: \(-246^{\circ}C\), Highest density - Liquid: \(-216^{\circ}C\), Medium density - Gas: \(-160^{\circ}C\), Lowest density
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video example #2: count the atoms is this a balanced or unbalanced equa…
Unbalanced equation. Balanced equation: \(2H_2+O_2 = 2H_2O\)
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with the simulation set to neon add the correct temperature, particle s…
- **Solid**: Close spacing, Particles vibrate in place, \(-259^{\circ}C\) - **Liquid**: Medium spacing, Particles vibrate and slide around but are still connected, \(-246^{\circ}C…
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part 1: video introduction to balancing video example #1: count the ato…
The un - balanced equation \(H_2+Cl_2 ightarrow HCl\) is unbalanced. The balanced equation is \(H_2 + Cl_2=2HCl\)
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write and balance the following chemical reactions. then identify each …
1. Balanced equation: \(2K + 2H_2O=2KOH + H_2\), Reaction type: Single - displacement reaction. 2. Balanced equation: \(Cl_2+2KBr = 2KCl+Br_2\), Reaction type: Single - displaceme…
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1.5 engage: states of matter 10 total points answer the question correc…
Its particles move faster and spread out.
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chemistry single replacement reaction worksheet using the activity seri…
1. $Ag + KNO_3 ightarrow NR$ 2. $Zn+2AgNO_3 ightarrow Zn(NO_3)_2 + 2Ag$ 3. $2Al + 3H_2SO_4 ightarrow Al_2(SO_4)_3+3H_2$ 4. $Cl_2 + 2KI ightarrow 2KCl+I_2$ 5. $2Li + 2H_2O ightarro…
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a chemical bond formed when two atoms share electrons choose an answer …
3. Covalent Bond
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1. ag + kno₃ → nr 2. zn + agno₃ → 3. al + h₂so₄ → 4. cl₂ + ki→ 5. li + …
1. \(NR\) 2. \(Zn + 2AgNO_3=Zn(NO_3)_2 + 2Ag\) 3. \(2Al + 3H_2SO_4=Al_2(SO_4)_3 + 3H_2\uparrow\) 4. \(Cl_2 + 2KI = 2KCl+I_2\) 5. \(2Li + 2H_2O = 2LiOH+H_2\uparrow\) 6. \(NR\) 7. \…
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using the activity series table, complete the following reactions by wr…
1. \(Ag + KNO_3 ightarrow NR\) 2. \(Zn + 2AgNO_3=Zn(NO_3)_2 + 2Ag\) 3. \(2Al+3H_2SO_4 = Al_2(SO_4)_3+3H_2\) 4. \(Cl_2 + 2KI=2KCl+I_2\) 5. \(2Li + 2H_2O=2LiOH + H_2\) 6. \(Cu + FeS…
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les tables de valeurs ci-dessous représentent des relations entre deux …
a) VI : Quantité de solvant (ml), VD : Temps de réaction (s) b) VI : Temps (h), VD : Quantité d'eau (ml)
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question 5 (1 point) water is a polar solvent and hexane (c₆h₁₄) is a n…
\(NaHCO_3\), soluble in water
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which statement best describes matter? a) matter is anything that can b…
B. Matter is anything that has mass and takes up space.
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select the correct answer from each drop - down menu why are biogeochem…
First blank (assuming it's about the amount being constant, but since only the second dropdown is shown with options): For the second dropdown - "renew" is the correct answer.
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a compound with the molar mass 216 g/mol has an empirical formula of c6…
\(C_{12}H_{12}N_2O_2\)
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a solution is prepared by dissolving 2 g of kcl in 100 g of h₂o. in thi…
- First question: solvent - Second question: grams of solute in 100 mL of solution - Third (partial) question: octane (non - polar) is not soluble in water (since it should follow…
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a compound with the molar mass 70.13 g/mol has an empirical formula of …
\(C_5H_{10}\)
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question 1 (1 point) saved in water, a substance that partially ionizes…
- **Question 1**: C. weak electrolyte - **Question 2**: C. grams of solute in 100 g of solution
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a compound with the molar mass 180 g/mol has an empirical formula of ch…
\(C_{6}H_{12}O_{6}\)
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a compound has an empirical formula of c₂oh₄ and a molar mass of 88 g/m…
\(C_{4}O_{2}H_{8}\)
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3. a dipole vector is an arrow that shows the different charges (aka th…
Electronegativity is the ability of an atom to attract electrons in a chemical bond. Electronegativity is highest in the upper - right (e.g., fluorine) and lowest in the lower - l…
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a compound with the molar mass 135 g/mol has an empirical formula of ch…
\(C_{5}H_{5}N_{5}\)
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step 3: apply the scaling factor to the empirical formula. the scale fa…
5
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flame tests and gas lamps lab purpose: identify an element based on the…
excited state; ground state; release