Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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6li(s) + n₂(g) → 2li₃n(s) part 1 of 2 what is the theoretical yield of …
\(30.1\%\)
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when heated, lithium reacts with nitrogen to form lithium nitride: 6li(…
\(20.9\ g\)
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so₂s electron geometry would most likely have which prefix in it? tetra…
Tri -
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hydrogen fluoride is used in the manufacture of freons (which destroy o…
\(77.0\%\)
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why are no lone pairs shown in the ch₄ molecule? all 4 of its valence e…
All 4 of its valence electrons are involved in a bond with hydrogen.
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why would ch₄s electron geometry and molecule geometry likely have the …
It has no lone pairs.
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27. circle the correct answer. 30) the element chromium has four natura…
\(51.996\) amu # 28.
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which molecule geometry would best describe so₂? square pyramidal tetra…
Bent
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a + b → c part 1 of 2 in the diagram above that represents the reaction…
Part 1: B is limiting Part 2: 5 molecules
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consider the reaction a + b → c part 1 of 2 in the diagram above that r…
B is limiting
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how many valence electrons does the sulfur atom have? 8 6 3 4
6
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question 24 (1 point) ✓ saved an atomic orbital is the location of an e…
the region of space in which an electron can be found
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how many valence electrons does sulfur share with oxygen atoms in this …
4
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nitric oxide (no) reacts with oxygen gas to form nitrogen dioxide (no₂)…
Limiting reactant: \(NO\) Moles of \(NO_2\) produced: \(0.877\) moles
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question 25 (1 point) how many electrons would be found in an atom that…
10
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which prefix would most likely be used in the name for ch4s electron an…
Tetra -
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question 24 (1 point) how many orbitals exist in the n = 2 energy level…
4
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how many valence electrons does the carbon atom have? 8 4 5 2
4
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question 23 (1 point) what is the aufbau principle? an atom is built up…
An atom is built up by the addition of electron starting at the lowest available energy orbital.
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question 22 (1 point) which quantum number describes the size of the ar…
A. \(n\)
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question 20 (1 point) which sublevel designations describes a spherical…
2s
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question 19 (1 point) which element has the electron configuration 1s²2…
chlorine
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question 13 (1 point) how many orbitals exist in the n = 2 energy level…
4
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heating 4.05 g of a metal oxide (molar mass of metal x = 55.9 g/mol) in…
\(X_2O_3(s)+3CO(g) ightarrow 2X(s)+3CO_2(g)\)
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question 13 (1 point) how many orbitals exist in the n = 2 energy level…
4
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heating 4.05 g of a metal oxide (molar mass of metal x = 55.9 \\frac{g}…
\(X_2O_3\)
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question 12 (1 point) in which period of the periodic table do the elem…
fourth
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question 11 (1 point) the n = 1 energy level contains _ p orbitals, whi…
0, 3
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question 18 (1 point) what is the electron configuration for a sodium i…
\(1s^{2}2s^{2}2p^{6}\) (the fourth option in the given choices)
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question 17 (1 point) what is true about the elements whose highest - e…
They are called transition metals.
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question 16 (1 point) how many quantum numbers are necessary to designa…
4
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question 9 (1 point) which element has the electron configuration ar4s²…
calcium
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question 15 (1 point) which subshell contains only one orbital? 4d 6f 3…
\(2s\)
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question 8 (1 point) how many quantum numbers are necessary to designat…
B. 4
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question 14 (1 point) which element has the electron configuration ar4s…
calcium
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21. which species is represented by the following information? p^+ = 12…
b. \(Mg^{+2}\)
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question 7 (1 point) which of the following is a valid set of four quan…
B. \(2,1,0,-1/2\)
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question 6 (1 point) which electron configuration is allowed in conside…
\(1s^{2}2s^{2}2p^{6}3s^{2}\)
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question 5 (1 point) which principle or rule demonstrates the fact that…
C. Hund’s Rule
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question 13 (1 point) how many quantum numbers are necessary to designa…
4
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question 4 (1 point) which quantum number describes the size of the are…
n
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question 12 (1 point) the magnetic quantum number of an orbital defines…
The spatial orientation of the orbital
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question 3 (1 point) there are _ unpaired electrons in a ground state s…
C. 2
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question 2 (1 point) there are __________ unpaired electrons in a groun…
3
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question 2 (1 point) there are _ unpaired electrons in a ground state p…
3 ### Question 3
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15. what 2 pieces of info do you need to calculate the average atomic m…
16. B. Neutrons 17. D. Mass number 18. C. Number of electrons lost 19. A. 21 20. B. 14 protons, 15 neutrons, 14 electrons
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leaded gasoline, which has been phased out in the us, contains an addit…
\(PbC_8H_{20}\)
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the n = 1 energy level contains __________ p orbitals, while all other …
0, 3
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however, as stated in the course outline, and in the orientation sessio…
\(1s^{2}2s^{2}2p^{6}\) (the second option)
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the principal quantum number of an orbital defines: the size of the ato…
The energy level of the orbital
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how many quantum numbers are necessary to designate the location of a p…
4
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an electron cannot have the quantum numbers n = _________, l = ________…
\(1,1,1\)
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question 9 (1 point) which of these is not a component of rutherfords m…
B. Electrons orbit the nucleus in well - defined orbitals.
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which subshell contains only one orbital? 4d 6f 3d 2s 1p
2s
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which element has the electron configuration 1s²2s²2p⁶3s²3p⁵? phosphoru…
chlorine
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question 8 (1 point) which observation did rutherford make as part of h…
Some alpha particles were deflected at various angles.
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what is the correct electron configuration for neon? 1s²2s²2p⁵3s¹ 1s²2s…
\(1s^{2}2s^{2}2p^{6}\) (the third option)
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question 7 (1 point) an atomic orbital is the location of an electron i…
the region of space in which an electron can be found
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which quantum number describes the size of the area in which an electro…
n
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how many quantum numbers are necessary to designate the location of a p…
4
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a chemistry teacher has 18 boxes of baking soda for students to use in …
27
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which electron configuration is allowed in consideration of hunds rule?…
\(1s^{2}2s^{2}2p^{6}3s^{2}\)
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question 1 (tek 6.3e) a chemistry teacher divided 31.5 ounces of vinega…
21
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question 5 (1 point) which of the following scientists proposed that th…
Dalton
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question 4 (1 point) bohr believed that electrons can possess only spec…
the line spectra produced by excited atoms
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consider the combustion of butane (c₄h₁₀): 2c₄h₁₀(g) + 13o₂(g) → 8co₂(g…
\(28.2\)
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question 3 (1 point) bohrs atomic model is referred to as a \quantum\ m…
each electron can only possess a specific amount of energy
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each copper(ii) sulfate unit is associated with five water molecules in…
\(0.247\)
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ammonia (nh₃) is a principal nitrogen fertilizer. it is prepared by the…
\(12.0\) mol \(H_2\) \(4.00\) mol \(N_2\)
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atomic structure, ions, isotopes and atomic theorists test review 1. de…
1. c. An atom of an element with a different number of neutrons 2. b. An atom of an element with a different number of electrons 3. b. Isotope 4. a. Ion 5. 47 6. 63 7. 47 8. c. \(…
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dichloroacetic acid is a compound with the chemical formula of chcl₂coo…
COOH
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ammonia is a covalent compound used in many cleaners. what is its chemi…
C. \(NH_3\)
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sebastian wants to write the chemical formula for phosphorus tetraoxide…
add a subscript of 4 after the \(O\)
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what is the chemical name for n₂o₃? nitrogen trioxide dinitrogen trioxi…
dinitrogen trioxide
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which refers to the chemical name of co? carbon monoxide carbon oxide m…
carbon monoxide
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gloria is writing the chemical formula for a compound using its chemica…
the periodic table
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which refers to a representation of a compound that gives the number of…
formula
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a common laboratory preparation of oxygen (o₂) gas is the thermal decom…
\(13.15\space g\)
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which prefix is needed when naming so₃? tri- penta- mono- di-
tri -
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how can a periodic table help a chemist write the chemical name of a co…
by identifying the elements
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martije has made a slight error in naming a compound monocarbon tetrabr…
\(CBr_{4}\) (carbon tetrabromide)
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n₂o is the chemical formula of a covalent compound used in the producti…
C. dinitrogen monoxide
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writing the second name in a chemical name n₂o is the chemical formula …
oxide
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identifying the order of elements n₂o is the chemical formula of a cova…
Nitrogen
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2. when an earthquake occurs, two sides of a fault slip past each other…
B. Potential
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n₂o is the chemical formula of a covalent compound used in the producti…
nitrogen and oxygen
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phosphorus trichloride is used in the production of chemicals that keep…
\(PCl_3\) (the second option)
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identifying the order of chemical symbols phosphorus trichloride is use…
\(P\)
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phosphorus trichloride is used in the production of chemicals that keep…
B. \(P\) and \(Cl\)
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use the drop - down menus to order the steps for writing chemical formu…
1. Identify the elements in the compound. 2. Use the periodic table to find the symbols of elements in the compound. 3. Write the chemical symbols in the order shown in the name. …
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date: directions: answer each question individually. q1: what is a calo…
Q1: a. A unit of measurement that measures the amount of energy food provides our bodies. Q2: d. The total number of calories someone burns in a day. Q3: c. Calorie deficit Q4: a.…
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which of the following best describes the relationship between solar en…
D. They are two distinct forms of energy
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which combination of characteristics best describes point source pollut…
1. Single location, immediate effects, easier to control 2. Implementing rain gardens and reducing lawn chemical use 3. Point source pollution because it comes from one identifiab…
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1. in which of the following examples would a free market approach work…
C. A face tightening procedure (to look younger)
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which of the following scenarios would be classified as both a point so…
First question: C. A burst sewage pipe releasing waste directly into a creek Second question: D. Both can introduce excess nutrients that promote rapid algae growth
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a chemical reaction produces solid sulfur as a product. which unit shou…
- For the mass of sulfur: grams - For the volume of gas: liters
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a chemical reaction produces solid sulfur as a product. which unit shou…
grams
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how much heat is absorbed when 15.0 g of liquid water is heated until t…
A. 376 J
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how much energy is required to raise the temperature of a 300.0 gram bl…
A. 1455 joules
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true/false (1pt. each) for each of the following, decide if the stateme…
1. False 2. False 3. False 4. False 5. True 6. True 7. False 8. True 9. True 10. False