化学
化学反応、化学量論、分子構造、元素の性質。
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what is the atomic number of this atom?
\(3\)
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12/17 subatomic particles with a positive charge neutrons protons atomi…
protons
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subatomic particles found on the outermost shell & responsible for the …
valence electrons
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small insects can walk across the surface of calm water. their feet pus…
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together.
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a neutral atom of the isotope $_{12}^{26}$mg would consist of 26 proton…
12 protons, 14 neutrons, 12 electrons
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how many valence electrons should nitrogen, element #7, have around its…
\(5\)
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using the picture, you can determine that carbon - 13 has _____ neutron…
\(7\)
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a very basic (alkaline) solution would be expected to have a ph of...
13
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what is the final concentration of a 508.43 ml solution that was prepar…
\(0.13\)
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what is the molarity of a solution with 49.6 g of nacl dissolved in 1.8…
\(0.45\)
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which compound is oxidized in the following reaction: fe(s) + cuso4(aq)…
\(Fe(s)\)
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what is the oxidation state for c in c₂h₃oh?
The oxidation state of \(C\) is \(-1\).
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identify the weak acid(s). there may be more than one. hclo4 h3po4 hi h…
\(H_3PO_4\), \(HF\)
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what is the concentration of ions in a solution that is 0.695 m in alum…
$[\ce{Al^{3+}}]=1.39\ \text{M}$; $[\ce{SO4^{2-}}]=2.085\ \text{M}$
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what type of reaction is the following: $cl_{2}+2oh^{-}\to cl^{-}+clo^{…
redox reaction
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consider the following reaction and identify the substance that is bein…
\(\text{Fe}(s)\)
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what type of reaction is the following: nh₃ + h⁺ → nh₄⁺ acid - base rea…
acid - base reaction
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consider the following reaction, and identify the substance that is the…
Cl in \(NCl_3\)
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what is the oxidation state for p in h4p2o7? you do not need to include…
\(5\)
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what is the oxidation state for cl in clo3? you do not need to include …
\(5\)
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what is the oxidation state for h in lih? you do not need to include a …
-1
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how many milliliters of a 0.309 m hcl solution are needed to completely…
$44.5\space mL$
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for an aqueous solution of sucrose (c12h22o11), calculate the volume, i…
\(31.2\) L
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how many grams of rboh are present in 153 ml of a 4.88 m rboh solution?…
\(76.5\space g\)
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how many grams of sodium phosphate are needed to make 626 ml of a 0.571…
\(58.6\space g\)
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how many grams of calcium sulfate are needed to make 460.0 ml of a 0.10…
\(6.26\space g\)
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for an aqueous solution of sodium chloride, determine the molarity of 6…
\(0.44\)
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what is the molarity of a solution of 49.1 g of calcium chloride (cacl2…
\(1.92\)
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for an aqueous solution of sucrose (c₁₂h₂₂o₁₁), calculate the molarity …
\(0.103\space M\)
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for an aqueous solution of sodium chloride, calculate the number of mol…
\( 5.52 \)
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what volume, in ml, of 0.63 m hno3 can be prepared by diluting 341 ml o…
\(2841.7\space mL\)
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if you have 910 ml of a 0.638 m hcl solution and you want to dilute it …
\(4.9\)
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what volume, in ml, of 6.30 m h₂so₄ is needed to prepare 35.50 ml of a …
\(1.92\space mL\)
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what is the concentration of ions in a solution that is 0.695 m in alum…
$[\ce{Al^{3+}}]=1.39\ M$ $[\ce{SO4^{2-}}]=2.085\ M$
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what type of reaction is the following: ca²⁺ + co₃²⁻ → caco₃ acid - bas…
precipitation reaction
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question 8 consider the following reaction and select the reducing agen…
Br⁻ in NaBr
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consider the following reaction and identify the substance being reduce…
\(F_{2}\)
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consider the following reaction, and identify the substance being reduc…
N in \(NCl_3\)
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consider the following reaction and identify the substance that is the …
Cr in \(Cr(C_2H_3O_2)_3(aq)\)
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2. how is the molar volume of a gas defined at stp? a. 22.4 liters per …
a. 22.4 liters per mole
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calculate the volume at stp for 4.000 l balloon filled with oxygen at 2…
1. \(298.15\) 2. \(273.15\) 3. \(n_2\) 4. \(P_2T_2\) 5. \(P_1 = 2.000\) atm, \(V_1 = 4.000\) L, \(T_1 = 298.15\) K, \(P_2 = 1.000\) atm, \(T_2 = 273.15\) K 6. \(2.000\) 7. \(4.000…
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how many moles of oxygen at stp in problem 7 above ? the volume at stp …
1. \(H\) (for \(V\) in the formula \(n=\frac{PV}{RT}\)) 2. \(K\) (for \(T\) in the formula \(n=\frac{PV}{RT}\)) 3. \(E\) (value of \(P = 1.000\) atm) 4. \(H\) (value of \(V = 7.32…
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question 9 (1 point) calculate the density of oxygen at stp using the v…
1. F. \(10.46\) 2. G. \(1.428\) 3. C. \(7.329\)
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question 10 (1 point) calculate the density of oxygen at stp using the …
1. H. \(32.00\) 2. G. \(1.428\) 3. D. \(22.414\)
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what is the volume of a 4.000 l balloon of oxygen when the pressure is …
\(1.333\) L
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instructions: in each question, list the elements from least to greates…
5) \(Cu<Mn<Rb\) 6) \(N<P<O\) 7) \(Be<Mg<K\) 8) \(I<Br<Cl\)
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give the temperature when 1.000 atm of ar in 6.000 l at 25.00 c is comp…
1. $298.15$; 2. $n_2$; 3. $V_2$; 4. $V_1$; 5. $298.15$; 6. $2.000$; 7. $1.000$; 8. $\frac{298.15\times2.000\times1.000}{1.000\times6.000}$; 9. $1.000$; 10. $6.000$
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instructions: in each question, identify the element with the greatest …
1) \(Ba\) 2) \(O\) 3) \(Cs\) 4) \(F\)
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give the temperature when 1.000 atm of ar in 6.000 l at 25.00 c is comp…
\(T_2 = 99.38\) K
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give the temperature when 1.000 atm of ar in 6.000 l at 25.00 c is comp…
1. D ($25 + 273.15=298.15$, closest to D if there is a mistake. But actually $T_1 = 298.15$). 2. A. 3. I. 4. H. 5. D. 6. (Assuming $P_2 = 2.000$ - not in options. But if we follow…
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question 4 (1 point) use kinetic theory to explain why the volume of a …
1. A. increase 2. A. increase 3. E. do nothing (because \(P_{in}=P_{out}\) is maintained) 4. A. increase 5. C. expand
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the pressure in a different 20.00 l container is 3.000 atm. it contains…
1. \(F. 3.00\) 2. \(C. 33.3\) 3. \(D. 66.7\) 4. \(C. 33.3\) 5. \(F. 3.00\) 6. \(B. 1.00\) 7. \(D. 66.7\) 8. \(F. 3.00\) 9. \(A. 2.00\)
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how many moles of gas is in the above 20.00 l container contains a gas …
1. B. 20.0 2. D. 323.15 3. E. 1.000 4. H. V 5. K. T 6. E. 1.000 7. B. 20.0 8. O. 0.7543 9. N. 0.08205 L atm/mol K 10. D. 323.15
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1) in each question, identify the element with the greatest atomic mass…
1. - a. Chromium (\(Cr\)) - b. Iodine (\(I\)) 2. - a. Potassium (\(K\)) - b. Strontium (\(Sr\)) 3. - a. Nitrogen (\(N\)) - b. Chlorine (\(Cl\)) 4. - a. \(Ga\lt As\lt P\) - b. \(Cs…
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instructions: in each question, list the elements from least to greates…
4) \(Sr<Mg < Be\) 5) \(Ge<As < Se\) 6) \(Cd<Sb < S\)
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instructions: in each question, identify the element with the greatest …
1. Chlorine (Cl) 2. Boron (B) 3. Copper (Cu)
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question 9 (0.5 points) part 2 draw the attraction between a water mole…
1. D. polar 2. W. \(\delta+\) 3. X. \(\delta-\) 4. T. dipole - dipole
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a chemist prepares a solution of calcium bromide (cabr₂) by measuring o…
\(7.88\times 10^{-2}\space mmol/L\)
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part 1 draw the attraction between a water molecule and a molecule of $…
1. A. nonpolar covalent 2. G. 0 3. B. polar covalent 4. J. 0.40 5. Q. symmetrical 6. E. nonpolar 7. X. \(\delta-\) 8. W. \(\delta+\)
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draw the attraction between a water molecule and a nitrite ion, no₂⁻¹ f…
1. B. polar covalent 2. I. 0.40 3. R. asymmetrical 4. (negatively charged) 5. B. polar covalent 6. K. 1.24 7. D. polar 8. \(\delta+\) (positive partial) 9. \(\delta-\) (negative p…
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a chemist weighed out 1.3 g of calcium. calculate the number of moles o…
$0.032$
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question 6 (0.5 points) part 2 draw the attraction between a water mole…
1. R. asymmetrical 2. D. polar 3. W. \(\delta+\) 4. X. \(\delta-\) 5. T. dipole - dipole
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question 4 (0.5 points) part 2 h₂o has 4 reds and is symmetrical/asymme…
1. R. asymmetrical 2. D. polar 3. W. \(\delta+\) 4. X. \(\delta-\) 5. U. hydrogen bond
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part 1 draw the attraction between a water molecule and a molecule of p…
1. A. nonpolar covalent 2. H. 0.01 3. R. asymmetrical 4. D. polar 5. W. \(\delta+\) 6. X. \(\delta-\) 7. B. polar covalent 8. K. 1.24
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part 2 draw the attraction between a water molecule and a molecule of n…
1. R. asymmetrical 2. D. polar 3. W. \(\delta+\) 4. X. \(\delta-\) 5. T. dipole - dipole
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part 1 draw the attraction between a water molecule and a molecule of n…
1. B. polar covalent 2. I. 0.94 3. R. asymmetrical 4. D. polar 5. X. \(\delta-\) 6. W. \(\delta+\) 7. B. polar covalent 8. K. 1.24
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how many lone pairs are there in the lewis structure of ammonia? a 4 b …
a 1
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if the molecular geometry with trigonal bipyramidal electron geometry (…
c 2
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what is the molecular geometry of clf5? a square pyramidal b seesaw c o…
a. Square pyramidal
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what is the molecular geometry of clf₄ (cl has 2 lone pairs)? a square …
e Square planar
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abbreviations should not be used when taking science notes because they…
F
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which of the following is one of the five basic shapes in molecules wit…
d. Linear
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which of the following molecules has tetrahedral molecular geometry? a …
C. Methane
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what is the molecular geometry of sf4? a seesaw b bent c t - shaped d l…
a. Seesaw
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h2o nh4+ brf5 bf3 nh3 co2 ch4 sf4 how many of the molecules above are t…
\(2\) (because \(NH_4^+\) and \(CH_4\) have tetrahedral molecular geometry)
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what is the f-xe-f angle in the molecule xef₂ (xe has three lone pairs …
\(180\)
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question 82 a patient being treated for cancer has had chemotherapy wit…
Obtain a STAT complete blood count (CBC) with differential.
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question 82 a patient being treated for cancer has had chemotherapy wit…
Obtain a STAT complete blood count (CBC) with differential.
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23. calculate the value of \\( \\delta h_{\\mathrm{rxn}}^{\\circ} \\) (…
B. -1124 kJ
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chemical bonds,glucose,oxygen,carbon dioxide,water,a carbon atom connec…
the combination of atoms, the combination of bonds, the arrangement of atoms
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neighborhoods are built around an existing incinerator. which of the fo…
C. A, B and C
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if the last carbon atom of an unsaturated fatty acid is bonded to two h…
single
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the diagram shows the general structure of a lipid, which consists of t…
carboxyl group
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lipids exhibit different characteristics based on their structures. the…
B. \(C = C\)
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find the relative clause. if it is nonrestrictive, set it off with comm…
During his tour of the organic chocolate factory, Alan learned about the *Theobroma cacao* which is a cacao tree native to the rain forests of Central America.
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which fat is most likely a solid at room temperature? one that is satur…
one that is saturated
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write a summary statement for unsaturated fats including whether they a…
Unsaturated fats are liquids at room temperature and have at least one double carbon - to - carbon bond.
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select all the correct answers. what are two essential elements of geog…
C. uses of geography, D. environment and society
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fff: types of support use the information below to answer the question.…
They require chemicals and alcohol to dissolve.
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fff: types of support use the information below to answer the question.…
dissolvable and standard
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fff: types of support use the information below to answer the question.…
They can be used without any detrimental effect on the surface design.
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fff: types of support use the information below to answer the question.…
They are made of the same material as the build material.
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question 2 1 pts a patient sustains chemical burns on both arms after a…
Remove the offending chemical and garments.
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building atoms complete the table for the given element. then, build th…
| ELEMENT | MAGNESIUM | |--|--| | SYMBOL/ABBREVIATION | \(Mg\) | | ATOMIC NUMBER | \(12\) | | ATOMIC MASS | \(24\) | | # OF PROTONS | \(12\) | | # OF NEUTRONS | \(12\) | | # OF EL…
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building atoms complete the table for the given element. then, build th…
|ELEMENT|SODIUM| |--|--| |SYMBOL/ABBREVIATION|Na| |ATOMIC NUMBER|11| |ATOMIC MASS|23| |# OF PROTONS|11| |# OF NEUTRONS|12| |# OF ELECTRONS|11|
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building atoms complete the table for the given element. then, build th…
| ELEMENT | NEON | |--|--| | SYMBOL/ABBREVIATION | \(Ne\) | | ATOMIC NUMBER | \(10\) | | ATOMIC MASS | \(20\) | | # OF PROTONS | \(10\) | | # OF NEUTRONS | \(10\) | | # OF ELECTRO…
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building atoms complete the table for the given element. then, build th…
| ELEMENT | FLUORINE | |--|--| | SYMBOL/ABBREVIATION | \(F\) | | ATOMIC NUMBER | \(9\) | | ATOMIC MASS | \(19\) | | # OF PROTONS | \(9\) | | # OF NEUTRONS | \(10\) | | # OF ELECTR…
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building atoms complete the table for the given element. then, build th…
|ELEMENT|OXYGEN| |--|--| |SYMBOL/ABBREVIATION|\(O\)| |ATOMIC NUMBER|\(8\)| |ATOMIC MASS|\(16\)| |# OF PROTONS|\(8\)| |# OF NEUTRONS|\(8\)| |# OF ELECTRONS|\(8\)|
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building atoms complete the table for the given element. then, build th…
| ELEMENT | NITROGEN | |--|--| | SYMBOL/ABBREVIATION | \(N\) | | ATOMIC NUMBER | \(7\) | | ATOMIC MASS | \(14\) | | # OF PROTONS | \(7\) | | # OF NEUTRONS | \(7\) | | # OF ELECTRO…
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building atoms complete the table for the given element. then, build th…
| ELEMENT | CARBON | |--|--| | SYMBOL/ABBREVIATION | \(C\) | | ATOMIC NUMBER | \(6\) | | ATOMIC MASS | \(12\) | | # OF PROTONS | \(6\) | | # OF NEUTRONS | \(6\) | | # OF ELECTRONS…