Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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how many chiral carbons are there in the compound shown below? • your a…
2
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what can be inferred about the pair of molecules shown below? select th…
These molecules are enantiomers.
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how many chiral centers are there in the compound below? • your answer …
3
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what can be inferred about the pair of molecules shown below? select th…
The molecules are enantiomers.
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all of the following are correct, except: chemical energy is stored ene…
Electrical energy is the movement of protons to create electricity.
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practice it! which of the following are accurate examples of forms of e…
A. A lawn mower uses mechanical energy. B. A battery stores chemical energy. E. A hot cup of coffee contains thermal energy.
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what can be inferred about the pair of molecules shown below? select th…
These molecules are not enantiomers.
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question which everyday object is chiral? select the correct answer bel…
C. shoe
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means \water loving\? hydrophobic hydrophilic aquaphilic aquaphobic
Hydrophilic
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drag and drop the words or phrases that accurately complete the paragra…
1. potential 2. stored 3. kinetic 4. transformed
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use the references to access important values if needed for this questi…
With higher average speeds, on average the molecules hit the walls of the container with more force. With more molecules per unit volume, the molecules hit the walls of the contai…
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the oxygen in a water molecule carries a slightly ________ charge
negative
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what two elements make up water? helium and oxygen hydrogen and oxygen …
Hydrogen and oxygen
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which answer means \water fearing\? aquaphilic hydrophilic hydraulic hy…
Hydrophobic
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question how many chiral carbons are there in the compound shown below?…
0
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which property of water means that it can dissolve almost any substance…
Universal Solvent
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8. which of these statements is an accurate description of the ionizati…
The ionization energy of lithium is greater than potassium.
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which of the following statements is true about the molecules shown bel…
The first molecule (a) is chiral, and the second molecule (b) is achiral.
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question how many chiral carbons are there in the compound shown below?…
2
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6. dmitri mendeleev studied the chemical characteristics of elements in…
predicting the reactivity of elements
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question give the molecular formula for erythrulose, the only ketotetro…
\(C_4H_8O_4\)
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question give the molecular formula of hexoaldose (a simple sugar that …
\(C_6H_{12}O_6\)
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3. cl : mg : cl the diagram represents the electron dot formula for the…
- The two electrons that the \(Mg\) atom loses are gained by the chlorine atom. - The two elements join together in an ionic bond.
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2. which of the following are true for the compound cacl₂? select two c…
- Its name is calcium chloride. - It forms an ionic bond.
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periodic table of elements which of the following are true for the comp…
- Its name is calcium chloride. - It forms an ionic bond.
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oxygen gas can be prepared by heating potassium chlorate according to t…
\(6.98\space g\)
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1. substance a is a gas, substance b is a liquid and substance c is a s…
C > B > A
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sodium metal reacts with water to produce hydrogen gas according to the…
\(0.712\)
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use the references to access important values if needed for this questi…
\(4.09\) atm
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give the molecular formula of ketopentose, which is a simple sugar that…
\(C_5H_{10}O_5\)
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in the fire starting video, which forms of energy are being transferred…
mechanical energy to heat energy
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its been a few weeks since chloe downloaded the apps you recommended. s…
Focus@Will
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use the references to access important values if needed for this questi…
$15.7$
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how many grams of phosphorus (p₄) are needed to completely consume 46.1…
\(38.9\ g\)
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what volume of carbon dioxide is produced when 20.5 g of calcium carbon…
\(5.01\space L\)
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what volume of oxygen gas is produced when 1.89 mol of hydrogen peroxid…
\(21.1\) liters
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use the references to access important values if needed for this questi…
\(54.2\space L\)
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use the references to access important values if needed for this questi…
\(0.603\)
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use the references to access important values if needed for this questi…
\(63.5\) liters bromine
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use the references to access important values if needed for this questi…
\(74.5\space L\)
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what is the total volume of gaseous products formed when 36.9 liters of…
\(258.3\space L\)
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unit 2 matter test* - wbms 2025 - 2026 39 of 40 < 31 32 33 34 35 36 37 …
Solid → Liquid → Gas (when adding energy); Gas → Liquid → Solid (when subtracting energy)
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question 1 3 tries left a spirit is made from a liquid that has been fe…
B. distilled
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why is a change in temperature also considered a sign of a chemical cha…
When bonds are broken or formed in a chemical reaction, they will release or absorb energy, often in the form of a temperature change.
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which scenarios are definite signs that a chemical reaction has occurre…
- Two liquids are mixed together and release a light. - A piece of iron begins to rust.
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examine the scenario. during an experiment between zinc and hydrochlori…
that a gas was produced during the reaction
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note: to answer some of the questions, it may help to reference a perio…
The release of energy through noise is a sign of a chemical reaction.
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note: to answer some of the questions, it may help to reference a perio…
change in temperature, change in odor
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note: to answer some of the questions, it may help to reference a perio…
1, 2, 2, 1
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note: to answer some of the questions, it may help to reference a perio…
1, 2, 2, 1
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examine the statement. potassium reacts with magnesium bromide to form …
\(2K + MgBr_{2} ightarrow 2KBr + Mg\) (the first option)
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what is the correct term for a shorthand notation that places chemical …
chemical equation
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note: to answer some of the questions, it may help to reference a perio…
the new substance that is formed from a chemical change
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what will happen to trace metals that are found on the skin when proces…
They will turn fluorescent.
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procedure: set the flashlight to emit infrared photons. click on the bo…
$H_2O>CH_4 > CO_2>N_2 = O_2$
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which of the following describes a physical property of a material? how…
Its color.
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what is the correct name for the compound in the image? bromine alumini…
Aluminum bromide
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what is the correct formula for calcium fluoride?
C. \(CaF_{2}\)
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what is the correct formula for barium nitride?
B. \(Ba_3N_2\)
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all ionic compounds contain... only transition metals. a metal and a no…
B. a metal and a nonmetal.
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which pair of elements is most likely to form an ionic compound? all of…
All of these
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what is an lonic bond? the sharing of the electrons directly in between…
The attraction between the negatively charged ion and the positively charged ion.
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wuhis / conc chem name date per worksheet: chemical bonding - ionic & c…
| Compound | Element 1 (metal or non - metal?) | Element 2 (metal or non - metal?) | Bond Type | |---|---|---|---| | \(NO_{2}\) | \(N=\text{non - metal}\) | \(O = \text{non - meta…
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how do atoms form ionic bonds? by transferring electrons only by gainin…
By transferring electrons
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6. what are the building blocks of all matter? solids forces gases atoms
atoms
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5. which is a \big idea\ for matter and change? the laws of nature have…
Atoms are the building blocks of all things.
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2. what are the three major branches of natural science? earth and spac…
Earth and space science, life science, and physical science
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3. based on your understanding of atomic structure, how do you think th…
The arrangement of protons, neutrons, and electrons in an atom significantly influences element interactions. Protons (atomic number) define the element. Electrons (especially val…
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3. describe the structure of an atom, including the location and charac…
An atom consists of a nucleus containing protons (positive, mass ≈ 1 amu) and neutrons (neutral, mass ≈ 1 amu), with electrons (negative, negligible mass) orbiting the nucleus. Pr…
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short answer questions answer the following short answer questions abou…
In a neutral atom, the number of protons (positively - charged) equals the number of electrons (negatively - charged), with neutrons (neutral) contributing to mass. This balance e…
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open-ended question list the mechanisms chemists can use to separate mi…
Filtrado, distilación, decantación, extracción, cristalización, centrifugación y cromatografía.
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which property will researchers use to separate mixtures containing iro…
magnetic field
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multiple - choice question distillation is used to separate: liquids fr…
liquids from other liquids
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ch. 4 quiz 2 which instrument would be most useful for identifying the …
Spectroscope
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basic atomic structure 1. label the parts of an atom in the diagram bel…
1. - a) Positive - b) No charge - c) Negative - d) Protons and neutrons 2. - Carbon: #P = 6, #N = 6, #E = 6 - Neon: #P = 10, #N = 10, #E = 10 - Potassium: #P = 19, #N = 20, #E = 1…
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chromatography separates substances based on their: (choose all that ap…
- solubility - size - polarity
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when using evaporation, the researcher was able to collect the liquid (…
False
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multiple - choice question evaporation only works if you have: insolubl…
soluble substances.
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multiple - choice question what property does a centrifuge use to separ…
B. density
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find the error with subject - verb agreement. select the incorrect verb…
are → is
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find the error with subject - verb agreement. select the incorrect verb…
are → is
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multiple - choice question what property are you using when using filtr…
size and solubility
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multiple - choice question prior to stirring, it appeared that the mixt…
heterogeneous.
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4. cornelius drebbel and robert boyle both made important discoveries a…
D. Drebbel, an alchemist, did not keep good records while Boyle, a scientist, carefully recorded his discoveries for others to reproduce.
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read the excerpt from a speech on the benefits of eating organic versus…
"chemicals", "disease", "obesity"
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what is the principal quantum number for this orbital?
\(n = 3\)
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10 multiple answer 1 point which of the following statements about s_n1…
A. They proceed with first - order kinetics., B. They proceed with two steps., C. They are unimolecular reactions, meaning the rate depends only on the substrate.
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multiple choice 1 point why do s_n1 reactions often lead to racemic mix…
The carbocation intermediate is planar, allowing nucleophilic attack from either side
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what type of mixture is formed when you have 1 green and 2 blue legos c…
Mixture of Compounds
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multiple choice 1 point which of the following is an example of a good …
$\ce{I^{-}}$
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multiple answer 1 point which of the following would increase the likel…
B. A tertiary carbon center, C. A bulky alkyl group on the substrate, D. A weak nucleophile
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what type of mixture is formed when you have 1 blue lego, 1 pink lego, …
Mixture of Elements
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wave functions describe orbitals in a hydrogen atom. each function is c…
The quantum number \( l \) can have values from \( 0 \) to \( 1 \). The total number of orbitals at the \( n = 2 \) energy level is \( 4 \). If the value of \( l = 0 \), the quant…
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6 multiple choice 1 point which of the following solvents would most li…
Methanol (polar protic)
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what type of mixture is created from having 1 blue lego, 1 green lego, …
Mixture of Atoms
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multiple choice 1 point which of the following conditions would not fav…
C. A strong nucleophile
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multiple choice 1 point why do tertiary alkyl halides generally react f…
Tertiary carbocations are more stable than primary carbocations.
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multiple choice 1 point in an $s_n1$ reaction, what role does the leavi…
departs from the substrate, allowing carbocation formation.
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multiple answer 1 point which statements are true about the role of the…
A. Polar protic solvents stabilize the carbocation through hydrogen bonding. B. Polar protic solvents stabilize the leaving group.
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multiple choice 1 point which of the following compounds is most likely…
\((\mathrm{CH}_3)_3\mathrm{CCl}\)