Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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does the model show an atom, molecule, or compound?* 2 point hydrogen h…
B. Molecule
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does the model show an atom, molecule, or compound? * citric acid c₆h₈o…
Molecule or Compound
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does the model show an atom, molecule, or compound? * phosphoric acid h…
Molecule or Compound
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a chemist needs to know the mass of a sample of caco₃ to 2 significant …
\(49\)
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bonded together? atom molecule compound does the model show an atom, mo…
Atom
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question 5 (2 points) the lewis structure for carbon tetrachloride, ccl…
1. E. 4 2. O. tetrahedral 3. Q. 109.5
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a chemist needs to know the mass of a sample of ( \text{na}_2\text{so}_…
\(47.2\) g
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what is the name for 2 or more atoms of different elements that are bon…
C. Compound
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does the model show an atom, molecule, or compound?* sugar c₆h₁₂o₆ atom…
Molecule or Compound
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question 4 (2 points) the lewis structure for nitrogen trichloride, ncl…
1. E. 4 2. P. pyramidal 3. Q. 109.5
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does the model show an atom, molecule, or compound?* oxygen atom molecu…
Molecule
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question 3 (2 points) the lewis structure for oxygen dichloride, ocl₂, …
1. E. 4 2. N. bent 3. Q. 109.5
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does the model show an atom, molecule, or compound? * isopropyl alcohol…
Molecule or Compound
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does the model show an atom or a compound?* water h2o atom molecule or …
Molecule or Compound
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question 2 (2 points) if there is no central atom, there are no reds. t…
1. A. 0 2. K. diatomic 3. T. no bond angles, no central atom
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balance the equation o₃ → o₂
\(2O_3 ightarrow3O_2\)
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question 1 (2 points) a region of electron density, or red, refers to a…
1. I. 8 2. J. no shape, atoms or ions 3. J. no shape, atoms or ions 4. T. no bond angles, no central atom
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a molecule of carbon monoxide (co) is made up of one carbon (c) atom an…
B.
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balance the equation ch₄ + o₂ → co₂ + h₂o
\(1CH_4+2O_2 ightarrow1CO_2 + 2H_2O\)
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does the model show an atom or a compound?* carbon dioxide co₂ atom mol…
Molecule or Compound
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does the model show an atom, molecule, or compound? * phosphorus atom m…
Atom
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level 1 5/10 balance the equation ch₄ + o₂ → co₂ + h₂o
\(CH_4+2O_2 ightarrow CO_2 + 2H_2O\)
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which of the following models represent a compound? * 3 points a. b. c.…
B and D
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does the model show an atom, molecule, or compound? * carbon atom molec…
Atom
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which type of model do you think is the best? (there are no wrong answe…
All of the above
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does the model show an atom, molecule, or compound? * 2 points n₂o nitr…
Molecule or Compound
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does the model show an atom, molecule, or compound? * 2 points nitrogen…
Atom
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does the model show an atom, molecule, or compound?* ammonia nh3 atom m…
Molecule or Compound
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does the model show an atom, molecule, or compound? * he helium he atom…
Atom
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does the model show an atom, molecule, or compound? * 2 pol carbonic ac…
Molecule or Compound
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does the model show an atom, molecule, or compound?* atom molecule comp…
Atom
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what is the name for 2 or more atoms that are bonded together?* 3 point…
Molecule or Compound
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what is the name for 2 or more atoms that are bonded together? * 3 poin…
Molecule or Compound
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a molecule of carbon dioxide is made up of one carbon (c) atom and two …
D.
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does the model show an atom, molecule, or compound? * ozone o3 atom mol…
Molecule
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does the model show an atom, molecule, or compound? * sulfuric acid h₂s…
Molecule or Compound
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does the model show an atom, molecule, or compound?* 2 points atom mole…
Molecule or Compound
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does the model show an atom, molecule, or compound?* oxygen o₂ atom mol…
Molecule
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which of the following models represent a molecule, but not a compound?…
A and C
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does the model show an atom, molecule, or compound? * cl atom molecule …
Atom
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question 6 of 13 the transformation shown utilizes hydroboration - oxid…
Oxymercuration - demercuration reagents give the Markovnikov product. Addition with acid and water as reagents gives the Markovnikov product. Hydroboration - oxidation reagents yi…
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does the model show an atom, molecule, or compound? hydrogen atom molec…
Atom
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does the model show an atom, molecule, or compound? * sulfuric acid h₂s…
Molecule or Compound
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a molecule of ammonia (nh₃) is made up of one nitrogen (n) atom and thr…
E
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does the model show an atom, molecule, or compound?* hydrogen atom mole…
Atom
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does the model show an atom, molecule, or compound?* chlorine atom mole…
Atom
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which of the following models represent a molecule, but not a compound?…
A, D, and C
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does the model show an atom, molecule, or compound?*oxygenatommoleculec…
Atom
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does the model show an atom, molecule, or compound?*citric acid
Molecule or Compound
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directions: write the formulas for the following compounds: 1. sulfur t…
1. \(SO_{3}\) 2. \(PH_{3}\) 3. \(N_{2}O_{3}\) 4. \(XeF_{6}\) 5. \(H_{2}O\)
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guided practice which two areas are covered in the study of physical sc…
B. chemistry and physics
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directions: write the names for the following compounds 1. br₂s 2. no₂ …
1. dibromine sulfide 2. nitrogen dioxide 3. sodium oxide 4. selenium dihydride 5. dipotassium oxide
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classify each chemical reaction as a synthesis, decomposition, single -…
- **Synthesis**: \(2\text{Na}(s)+\text{O}_2(g)\to\text{Na}_2\text{O}_2(s)\) - **Decomposition**: \(\text{CaSO}_4(g)\xrightarrow{\text{heat}}\text{CaO}(s)+\text{SO}_3(g)\) - **Sing…
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8. for the following diagram, identify which two or more elements or ga…
The unknown mixture is made up of Gas A, Gas C, and Gas D.
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directions: write the formulas of the following ionic compounds: 1. pot…
1. \(KI\) 2. \(MgO\) 3. \(AlCl_3\) 4. \(Be_3P_2\) 5. \(CaCl_2\)
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correct acid base reactions form water when an acid combines with a bas…
\( \text{HClO}_{4}(aq)+\text{NaOH}(aq)\to\text{NaClO}_{4}(aq)+\text{H}_{2}O(l)\)
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directions: write the names of the following ionic compounds: 1. nabr 2…
1. Sodium bromide 2. Calcium oxide 3. Lithium sulfide 4. Magnesium bromide 5. Beryllium oxide
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directions: write the formulas of the following covalent compounds: 1. …
1. \(NCl_3\) 2. \(BC\) 3. \(N_2O_3\) 4. \(PF_5\) 5. \(P_4O_{10}\)
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hcl(aq) + ba(oh)₂(aq) → express your answer as a chemical equation incl…
- \(2HCl(aq)+Ba(OH)_2(aq)=BaCl_2(aq)+2H_2O(l)\) - \(H_2SO_4(aq)+2KOH(aq)=K_2SO_4(aq)+2H_2O(l)\)
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naming and writing ionic and covalent bonds independent practice period…
1. Sulfur trioxide 2. Dinitrogen sulfide 3. Phosphorus trihydride (or phosphine) 4. Boron trifluoride 5. Diphosphorus tetrabromide
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directions: write the names of the following covalent compounds: 1. so₃…
1. Sulfur trioxide 2. Dinitrogen sulfide 3. Phosphorus trihydride (or phosphine) 4. Tribromine 5. Tetraphosphorus tetrabromide 1. \(NCl_3\) 2. \(BC\) 3. \(N_2O_3\) 4. \(PF_5\) 5. …
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an isotope has three forms. 30% have a mass of 4 amu, 20% have a mass o…
\(4\) amu (since \(3.7\) amu is closest to \(4\) amu among the given options)
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a neutral atom of the isotope $^{26}_{12}$mg would consist of 12 proton…
12 protons, 14 neutrons, 12 electrons
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what is an ion? a cute atom a small atom a large atom a charged atom
A Charged Atom
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what is the atomic number of neon, ne?
10
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if neutral copper atom (atomic number 29) becomes an ion that has a cha…
27
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an element has two naturally occurring isotopes. one is 10.013 amu and …
The average atomic mass is approximately \(10.812\) amu. The element is Boron.
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if a hydrogen atom has 1 proton, 1 electron, and 1 neutron, its atomic …
1
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oxygen has 8 protons. what is oxygens atomic number?
8
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question 203 acids and bases which is a ph of an acidic substance? sele…
3.2
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the mass of an atom is located in the ____________ and the volume of an…
nucleus, electron cloud
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fill in the blanks: 1. the ______________ approach is concerned with th…
1. cognitive 2. psychometric 3. Piagetian 4. Bayley Scales 5. pre - linguistic 6. Habituation 7. behaviorist; nativist 8. linguistic 9. sensorimotor 10. Causal reasoning
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isotopes are atoms of the same element that have the same number of ___…
A. protons, neutrons
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question 202 oxidation and reduction the following chemical reaction wa…
\(H_2S\) (the option corresponding to \(H_2S\) in the multiple - choice list)
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fluorine has an atomic number of 9. what can you conclude about an atom…
It has 9 protons.
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on the periodic table, how is atomic mass represented? as an average of…
As an average of the mass of different isotopes.
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what do carbon - 12 and carbon - 14 have in common? they have the same …
They have same number of protons.
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use the text to compare and contrast dark chocolate and white chocolate…
- Contains cocoa powder: Dark chocolate (✓), White chocolate (✗) - Semi - sweet, bitter flavor: Dark chocolate (✓), White chocolate (✗) - Offers health benefits: Dark chocolate (✓…
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solubility practice 1 chemistry of earth and space science 1. what are …
1. Units for solubility can be $g/100g$ solvent (e.g., grams of solute per 100 grams of water), $mol/L$ (moles of solute per liter of solution) etc. 2. The density of water is $1.…
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potassium bromide and calcium sulfide express your answer as a chemical…
\(2KBr(aq)+CaS(aq) ightarrow K_{2}S(aq)+CaBr_{2}(aq)\) (or we can write "noreaction" as no precipitate is formed)
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atomic number 12.011 c 6 carbon atomic mass chemical symbol element nam…
The "C" represents the chemical symbol of the element carbon.
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enter the ions present in a solution of lic₂h₃o₂. express your answers …
\(Li^{+},C_2H_3O_2^{-}\) \(Ni^{2 +},NO_3^{-}\) \(K^{+},PO_4^{3 -}\)
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part a write a balanced chemical equation for the reaction of gaseous n…
\(2NO_2(g)+7H_2(g) ightarrow 2NH_3(g)+4H_2O(l)\)
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part a which observation is consistent with a chemical reaction occurri…
- During observation A (propane burns), new substances are formed, so the observation is consistent with a chemical reaction occurring. - During observation B (acetone evaporates …
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entering more complex expressions to enter an ion such as $so_{4}^{2-}$…
\(Na^+,SO_4^{2 - }\)
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the diagram below is a model of two solutions. each ball represents one…
Solution B
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enter the symbol of a sodium ion, $\\ce{na^{+}}$, followed by the formu…
- Part B: \( \ce{Na+},\ce{SO4^{2 - }} \) - Part C: \( ^{14}_7\ce{N}+^{4}_2\ce{He} \)
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which of the following are properties of an ideal gas? select one or mo…
All of the options (each particle has a negligible volume compared to its surroundings, gas particles move randomly in all directions at the same average kinetic energy at constan…
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the diagram below is a model of two solutions. each ball represents one…
Solution A
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the diagram below is a model of two solutions. each ball represents one…
Solution A
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when you enter your answer, keep in mind that the order of the elements…
\(C_4H_{10}\)
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the diagram below is a model of two solutions. each ball represents one…
Solution B
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the diagram below is a model of two solutions. each ball represents one…
Solution B
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the diagram below is a model of two solutions. each ball represents one…
Solution A
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the diagram below is a model of two solutions. each yellow ball represe…
Solution A
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the diagram below is a model of two solutions. each blue ball represent…
Solution A
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the diagram below is a model of two solutions. each purple ball represe…
Solution B
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the diagram below is a model of two solutions. each green ball represen…
neither; their concentrations are the same
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which of the following is true? a nonmetals are used to make pans, sinc…
B. Metals are used in electrical cables as they are malleable, ductile and good conductors of electricity
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which statement(s) is/are false? select all that apply a neutral atoms …
B. All atoms are about the same size. C. Protons and neutrons repel each other and position themselves far apart inside the atom.