化學
化學反應、化學計量、分子結構與元素性質。
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dissolving. increasing both the surface area and stirring will allow su…
1. D. a kind of matter that has consistent properties. 2. A. aqueous solution.
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here are sketches of four electron orbitals: are any of them s orbitals…
- Are any of them s orbitals? no - List the s orbitals, if any. (leave blank) - Are any of them p orbitals? yes - List the p orbitals, if any. A
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here are sketches of four electron orbitals: a b c d are any of them s …
- Are any of them s orbitals? : no - List the s orbitals, if any. : (leave blank) - Are any of them p orbitals? : yes - List the p orbitals, if any. : A, B, C
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an atomic cation with a charge of +1 has the following electron configu…
- Chemical symbol: \(Na^{+}\) - Number of electrons: \(10\) - Number of \(2s\) electrons: \(2\)
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an atomic cation with a charge of +1 has the following electron configu…
- Chemical symbol for the ion: \(Al^{+}\) - Number of electrons in the ion: \(12\) - Number of \(3s\) electrons in the ion: \(2\)
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an atomic anion with a charge of -1 has the following electron configur…
- Chemical symbol for the ion: \(I^{-}\) - Number of electrons in the ion: \(54\) - Number of \(5p\) electrons in the ion: \(6\)
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draw the electron configuration for a neutral atom of cobalt.
The electron configuration of a neutral cobalt atom is \( 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{7} \).
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what is the electron configuration of antimony? kr5s²5d¹⁰5p⁶ kr5s²4d¹⁰5…
\[ \text{[Kr]}5s^{2}4d^{10}5p^{3} \]
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you might have to look back in your notes. what rule helps us place the…
Hund's Rule
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multiply or divide the following measurements. be sure each answer you …
\(1.84\frac{m}{s}\), \(6600cm^{2}\), \(340\frac{g}{mL}\)
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write the electron configuration for a nitrogen anion with a charge of …
\(1s^{2}2s^{2}2p^{5}\)
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write the electron configuration for a neon cation with a charge of +2.
\(1s^{2}2s^{2}2p^{4}\)
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write the electron configuration for a neutral atom of silicon.
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\)
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write the electron configuration of an atom of the element highlighted …
\([Ar]4s^{2}3d^{10}4p^{4}\)
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part a on a mission to a newly discovered planet, an astronaut finds co…
\(63.55\) amu # Part B ## Step1: Calculate the contribution of \(^{86}\text{Sr}\) The contribution of \(^{86}\text{Sr}\) is calculated by multiplying its mass by its abundance. \[…
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silicon has three naturally occurring isotopes: si - 28 with mass 27.97…
\(28.10\) amu
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citrus fruits tend to have high acidity. true false
True
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homework: naming & forming covalent / molecular compounds covalent comp…
1. \( \text{NH}_3 \) 2. \( \text{SF}_6 \) 3. \( \text{N}_2\text{O}_5 \) 4. \( \text{NO} \) 5. \( \text{CCl}_4 \) 6. \( \text{NO} \) 7. \( \text{P}_2\text{O}_5 \) 8. nitrogen tribr…
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write the electron configuration of an atom of the element highlighted …
\(1s^{2}2s^{2}2p^{6}3s^{1}\)
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write the electron configuration of an atom of the element highlighted …
\([\text{Ar}]4s^{2}3d^{1}\) or \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{1}\)
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write the electron configuration of an atom of the element highlighted …
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\)
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1. explain the difference between temperature and heat. 2. identify thr…
1. Temperature is about particle kinetic energy; heat is thermal energy transfer. 2. High surface tension, high specific heat, lower - density solid. 3. Ocean water at the North P…
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label the reactants and products in the chemical equation below. mg + o…
Reactants: \(Mg\) and \(O\); Product: \(MgO\)
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write the electron configuration of an atom of the element highlighted …
\([Xe]6s^{1}\)
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list some ways that chemical reactions are important in our daily lives.
Digestion (breaking down food for energy), cooking (altering food properties), photosynthesis (plants' energy conversion), battery operation (electricity production).
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1. what is the only substance on earth that naturally occurs in all thr…
1. Water is the only substance on Earth that naturally occurs in all three states (solid - ice, liquid - water, gas - water vapor). 2. Water is often referred to as a universal so…
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list evidence that can be used to identify if a chemical reaction has o…
Color change, gas evolution, precipitation, temperature change, light emission.
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a ball sitting at the top of a hill has: potential energy only kinetic …
- First question: Potential energy only. - Second question: True.
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a clear liquid from a flask is poured into another clear liquid in a be…
C. A yellow solid forms and then settles to the bottom of the beaker.
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when you eat food and move, your body transforms chemical energy into: …
Kinetic and thermal energy; Thermal energy
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which type of energy is the energy of motion? light energy potential en…
- For the first question: Kinetic Energy - For the second question: Chemical energy to light and heat
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which of the following is a mixture of a solid and a liquid sand and pe…
salt and water
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which of these is a result of a chemical change? a new substance mixtur…
A. A new substance
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a granular substance is added to a liquid. which of the following would…
The liquid gives off heat.
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which of these do not happen during a chemical change? the chemical pro…
The chemical properties of the beginning substance(s) are the same as those of the end product(s)
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vanessa had a beaker with a small amount of baking soda. she drops vine…
It was a gas.
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what type of substance is made up of a single kind of atom? mixture sol…
element
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evidence of a chemical reactions is anything that shows - a new substan…
a new substance has formed
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balance the equation 1 fecl₃ + 3 naoh → 1 fe(oh)₃ + nacl
\(3\)
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which of the following is an example of a chemical property? shape red …
Flammability
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saltwater is a: pure substance heterogeneous mixute homogeneous mixture…
homogeneous mixture
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balance the equation fecl₃ + naoh → fe(oh)₃ + nacl
\(1FeCl_3 + 3NaOH ightarrow1Fe(OH)_3 + 3NaCl\)
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why does mars have an overall reddish color when we see its surface fro…
The material of Mars' surface contains a lot of iron oxide, the same chemistry that makes rusting metals look reddish.
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this picture shows a heterogeneous mixture. a homogeneous mixture. a pu…
A. a heterogeneous mixture.
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freezing juice? chemical change physical change
Physical Change
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balance the equation fe + o₂ → fe₂o₃
\(4Fe+3O_2 ightarrow2Fe_2O_3\)
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gas being produced is of a chemical change known evidence true cause
Evidence
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question 16 (0.5 points) the following shape has __1__ reds, __2__ are …
1. G. 6 2. C. 2 3. F. 4 4. S. square planar 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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the following shape has __1__ reds, __2__ are bonding and __3__ are non…
1. G. 6 2. D. 3 3. D. 3 4. Q. octahedral 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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which of the following is an example of a chemical property? density fl…
flammability
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3 fill in the blank 0.5 points the symbol for nickel is type your answe…
Ni
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question 14 (0.5 points) the following shape has __1__ reds, __2__ are …
1. G. 6 2. E. 4 3. C. 2 4. S. square planar 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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2 fill in the blank 0.5 points ca stands for type your answer...
Calcium
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balance the equation albr₃ + k₂so₄ → kbr + al₂(so₄)₃
\(2\) \(AlBr_3\), \(3\) \(K_2SO_4\), \(6\) \(KBr\), \(1\) \(Al_2(SO_4)_3\)
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question 13 (0.5 points) the following shape has __1__ reds, __2__ are …
1. F. 5 2. E. 4 3. B. 1 4. O. seesaw 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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question 12 (0.5 points) the following shape has __1__ reds, __2__ are …
1. G. 6 2. G. 6 3. A. 0 4. Q. octahedral 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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question 11 (0.5 points) the following shape has __1__ reds, __2__ are …
1. G. 6 2. C. 2 3. E. 4 4. Q. octahedral 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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question 10 (0.5 points) the following shape has __1__ reds, __2__ are …
1. F. 5 2. D. 3 3. C. 2 4. P. T - shape 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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question 9 (0.5 points) the following shape has __1__ reds, __2__ are b…
1. F. 5 2. E. 4 3. B. 1 4. O. seesaw 5. X. \(90^{\circ}\), \(120^{\circ}\), and \(180^{\circ}\)
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question 8 (0.5 points) the following shape has __1__ reds, __2__ are b…
1. G. 6 2. F. 5 3. B. 1 4. O. square pyramidal 5. Y. \(90^{\circ}\) and \(180^{\circ}\)
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balance the equation c₂h₅oh + o₂ → co₂ + h₂o
\(1C_{2}H_{5}OH + 3O_{2}\to2CO_{2}+3H_{2}O\)
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which types of bonds are in each molecule? complete the table to descri…
| Chemical bonds | Glucose | Oxygen | Carbon dioxide | Water | | --- | --- | --- | --- | --- | | a carbon atom connected to another carbon atom | ✔️ | ❌ | ❌ | ❌ | | an oxygen atom…
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question 7 (0.5 points) the following shape has __1__ reds, __2__ are b…
1. E 2. C 3. C 4. K 5. U
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the reactants and products of cellular respiration are made of the same…
\(CHO_6+6O_2 ightarrow6CO_2+6HO_2\) (assuming non - standard formula writing for the problem's options where \(CHO_6\) represents \(C_6H_{12}O_6\))
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question 6 (0.5 points) the following shape has __1__ reds, __2__ are b…
1. E. 4 2. D. 3 3. B. 1 4. M. pyramidal 5. U. \(109.5^{\circ}\)
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balance the equation ca(oh)₂ + hcl → cacl₂ + h₂o
1, 2, 1, 2
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question 5 (0.5 points) the following shape has __1__ reds, __2__ are b…
1. E. 4 2. E. 4 3. A. 0 4. L. tetrahedral 5. U. \(109.5^{\circ}\)
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question 4 (1 point) the following shape has __1__ reds, __2__ are bond…
1. D. 3 2. C. 2 3. B. 1 4. M. pyramidal 5. U. \(109.5^{\circ}\)
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a carbon atom connected to another carbon atom an oxygen atom connected…
the combination of atoms, the combination of bonds, the arrangement of atoms
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the following shape has __1__ reds, __2__ are bonding and __3__ are non…
1. E. 4 2. D. 3 3. B. 1 4. M. pyramidal 5. U. \(109.5^{\circ}\)
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here are sketches of four electron orbitals: are any of them s orbitals…
- Are any of them s orbitals? no - List the s orbitals, if any. (leave blank) - Are any of them p orbitals? yes - List the p orbitals, if any. B
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here are sketches of four electron orbitals: are any of them s orbitals…
- Are any of them \(s\) orbitals? yes - List the \(s\) orbitals, if any. \(B\) - Are any of them \(p\) orbitals? yes - List the \(p\) orbitals, if any. \(C\)
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balance the equation cabr₂ + mg(no₃)₂ → ca(no₃)₂ + mgbr₂
\(1\) \(CaBr_{2}+1\) \(Mg(NO_{3})_{2}\to1\) \(Ca(NO_{3})_{2}+1\) \(MgBr_{2}\)
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32 formula 3 points what is the boiling point, in $^{circ}c$, of an aqu…
\(103.60^{\circ}C\)
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31 formula 4 points how many ml of a 0.16 m h₂so₄ solution will you nee…
\(55.94\space mL\)
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a. h₂ b. n₂ c. cannot be determined - 16. if the images below represent…
a. \(H_2\)
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test information description fsm1165 the food safety manager required q…
Tomato sauce in a copper pan
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here are sketches of four electron orbitals: are any of them s orbitals…
- Are any of them s orbitals? : no - List the s orbitals, if any. : (leave blank) - Are any of them p orbitals? : yes - List the p orbitals, if any. : C
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question 2 (1 point) the following shape has __1__ reds, __2__ are bond…
1. C. 2 2. C. 2 3. A. 0 4. I. linear 5. W. \(180^{\circ}\)
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30 formula 3 points how many ml of a 12.0 m stock solution do you need …
\(72.0\space mL\)
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question 1 (1 point) the following shape has __1__ reds, __2__ are bond…
1. C. 2 2. C. 2 3. A. 0 4. I. linear 5. W. \(180^{\circ}\)
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what is the molarity of a solution if you add 18.18 g of sodium hydroxi…
\(0.971\space mol/L\)
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banana oil (c₇h₁₄o₂) is created by adding acetic acid (c₂h₄o₂) and isop…
\(77.04\%\)
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here are sketches of four electron orbitals: a b c d are any of them s …
- Are any of them s orbitals? yes - List the s orbitals, if any. D - Are any of them p orbitals? yes - List the p orbitals, if any. B
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what is the percent yield of a product if you produced 38.86 g of the p…
\(19.56\%\)
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26 formula 4 points the equation for the reaction of glucose (c₆h₁₂o₆) …
551.7 g
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list these electron subshells in order of increasing energy. 4d, 5s, 4p…
\(3d<4p<5s<4d\)
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25 numeric 2 points what is the oxidation state of iron in fecl₂? answe…
\(+2\)
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balance the equation
1, 3, 2
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list these electron subshells in order of increasing energy. 5p, 5s, 6s…
\(5s<4d<5p<6s\)
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24 numeric 2 points what is the oxidation state of chlorine in clo₃⁻? a…
\(+5\)
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balance the equation nacl + f₂ → naf + cl₂
\(2NaCl + 1F_2 ightarrow2NaF+1Cl_2\)
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list these electron subshells in order of increasing energy. 4s, 2p, 3s…
\(2p<3s<3p<4s\)
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questions 21 - 23 prompt questions 21 - 23: determine the molecular equ…
Type of reaction: gas - evolving reaction Net ionic equation: \(NH_4^+(aq)+OH^-(aq)\to NH_3(g)+H_2O(l)\)
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balance the equation ag₂o → ag + o₂
The balanced equation is \(2Ag_2O ightarrow4Ag + O_2\), so the coefficients are \(2\), \(4\), \(1\) respectively.
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does the model show an atom, molecule, or compound? * acetic acid atom …
Molecule or Compound
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questions 21 - 23 prompt questions 21 - 23: determine the molecular equ…
Molecular equation: \(NH_4Cl(aq)+NaOH(aq)=NH_3(g)+H_2O(l)+NaCl(aq)\) Type of reaction: Acid - base reaction Net ionic equation: \(NH_4^{+}(aq)+OH^{-}(aq)=NH_3(g)+H_2O(l)\)
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does the model show an atom, molecule, or compound? * sulfur s₈ atom mo…
Molecule
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which of the following models represent a compound?* 3 points a b c d e…
B. E, and F
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does the model show an atom, molecule, or compound? * 2 points na sodiu…
Atom