Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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question 11 the two molecules shown in the above figure are best descri…
B. Geometric (cis - trans)
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question 10 the function of a buffer is to ________. o increase the ph …
minimize changes in pH by absorbing or releasing H+ in a solution and consequently stabilize the pH of the solution.
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substances that release (donate) hydrogen ions (h⁺) in a solution are k…
C. acids
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question 8 one liter of lemon juice of ph 2 has _______ times more h+ t…
1000
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question 7 in a basic solution: o ph > 7 o no ph value is detected. o p…
pH > 7
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question 6 this occurs when an excess of (extra) h⁺ are added to a solu…
acidity increases and pH decreases
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question 5 the chemical bond formed by an unequal attraction of the sha…
B. polar covalent bond
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question 4 the atomic number of phosphorus (p) is 15. compared with ³¹p…
B. one more neutron
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magnesium atom has an atomic number of 12. what type of chemical bonds …
C. Ionic bonds
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question 2 which of the following would be classified as a compound? o …
H2O
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question 1 if an atom has a charge of (-1), this indicates that this at…
C. all the mentioned choices are correct.
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organic solidarity refers to a) the way institutions of society functio…
d) how people disagree on basic values and customs but nonetheless work together.
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the solubility of a compound is 59 g / 100 ml in boiling methanol and 3…
0 g
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question 11 the ____ of a neuron contain ____ that house neurotransmitt…
C. terminal buttons; synaptic vesicles
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question 4 the endocrine system consists of a series of glands that pro…
B. hormones
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question 42 (2 points) listen according to robert k. merton, the intend…
C. manifest functions
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the solubility of a compound is 7.2 g / 100 ml in water at 95 °c and 0.…
97%
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the solubility of a compound is 59 g / 100 ml in boiling methanol and 3…
49%
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the solubility of a compound is 59 g / 100 ml in boiling methanol and 3…
29 g
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harriet martineau and auguste comte shared the belief that a) sociologi…
A. sociologists should do more than just observe; they should also act in ways that benefit society.
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the solubility of a compound is 59 g / 100 ml in boiling methanol and 3…
3.54 g
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according to w. e. b. du bois, black americans’ sense of self and ident…
C. double consciousness
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10. consider the following reaction: h₂(g) + i₂(g) ⇌ 2 hi(g). kc = 54.3…
$[H_2]=0.00463$ M, $[I_2]=0.00254$ M, $[HI]=0.0256$ M
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making models: drawing carbohydrates 4 parts 0.5 of 1 point based on wh…
A. carbon 1
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the four compounds below have similar molar masses. rank the pure liqui…
1. $C(CH_3)_4$ 2. $CH_3CH_2OCH_2CH_3$ 3. $CH_3CH_2CH_2CH_2CH_3$ 4. $CH_3CH_2CH_2CH_2OH$
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out of the compounds below, which is most likely to be a gas at room te…
Perfluoroethane $C_2F_6$
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question 5 (1 point) a fictional metallic element (atomic mass m = 76.9…
203
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question 4 (1 point) listen of what type are the strongest intermolecul…
C. Dispersion forces
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considering the following list of compounds, which statement is most li…
Decane ($C_{10}H_{22}$) is more viscous than pentane ($C_5H_{12}$) because decane ($C_{10}H_{22}$) has the greatest intermolecular dispersion forces.
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multiple choice question substances that are able to conduct an electri…
D. electrolytes
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4 group the labels according to the arrangement of elements they descri…
Period: Horizontal row, Lithium through neon Both: Based on sections, Number of electron shells Group: Vertical columns, Alkaline - earth metals
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3 which elements have two electron shells? choose more than one answer.…
B. Lithium, C. Boron, E. Oxygen, G. Nitrogen
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the four compounds below have similar molar masses. rank the pure liqui…
C($\mathrm{CH_3}$)$_4$: 1 $\mathrm{CH_3CH_2OCH_2CH_3}$: 2 $\mathrm{CH_3CH_2CH_2CH_2CH_3}$: 3 $\mathrm{CH_3CH_2CH_2CH_2OH}$: 4
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an unknown liquid in a glass tube forms a meniscus, similar to the one …
Adhesive forces between liquid and glass are stronger than cohesive forces within the liquid
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9. convert the calculated heat released by the combustion of an entire …
If the heat released in kilocalories is \(x\), the heat released in joules is \(4184x\)
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7. there is a device called a bomb calorimeter that can be used to make…
The insulating container prevents heat loss to the environment, the stirrer ensures uniform heat distribution, and the sealed and jacketed design creates a controlled system, all …
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your experimental energy released per gram of a pistachio is 5.43 (expe…
The mass of fuel burned was smaller than expected.
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1 label the various categories on the periodic table of elements. poor …
Poor metals: elements to the right of metalloids below them. Transition metals: groups 3 - 12. Noble gases: group 18. Alkali metals: group 1. Semimetals: diagonal region between m…
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2. in order to compare this theoretical value to your experimental heat…
$A = 1000\ J$, $B = 1\ kJ$, $C = 1\ cal$, $D = 4.18\ J$, $E = 1\ kcal$, $F = 1000\ cal$
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8. in the reaction 2 so₂(g) + o₂(g) ⇌ 2 so₃(g), 0.455 mol so₂, 0.183 mo…
The mixture is not at equilibrium. The reaction will proceed in the forward direction.
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short answer (2 - 3 sentences each): 1. what are fossil fuels, and why …
1. Fossil fuels are energy - rich substances formed from ancient organic matter. They are non - renewable due to their long - term formation process relative to consumption. 2. So…
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7. is a mixture of 0.0205 mol no₂(g) and 0.750 mol n₂o₄(g) in a 5.25 l …
The reaction is not at equilibrium and will proceed in the forward direction.
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multiple - choice question why does ice float? of covalent bonds pushin…
The option that says "of hydrogen bonds spreading the molecules out in a lattice causes water to be less dense and thus float" is correct.
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6. consider the following reaction: so₂cl₂(g) ⇌ so₂(g) + cl₂(g) a react…
$0.018$
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adhesion is caused by water molecules forming ______ bonds with other s…
hydrogen
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hydrogen bonds occur between molecules because the partially positive h…
The partially positive hydrogen are attracted to the partially negative oxygen on other water molecules
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the oxygen on a water molecule is electronegative which means it does w…
Holds onto electrons and is partially negative in charge
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sulfur (s) has an atomic number of 16. what is the electron configurati…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}$ (corresponding to the second option in the multiple - choice list)
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part 4: analyze and classify look at each formula below. based on the e…
| Compound | Elements Involved | Bond Type | Draw the Bond What happens to the e⁻? | |--|--|--|--| | 14. NaCl | Sodium + Chlorine | Ionic | Na - Cl; the cation donates 1 valence e…
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what is the total number of electrons that can occupy the d sublevel? 2…
C. 10 electrons
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which of the following is not a possible sublevel? 1s 2p 3f 4d
C. 3f
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the partial electron configuration of an atom with 12 electrons is show…
$3s^{2}$
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what type of orbital is spherical in shape? s orbital p orbital d orbit…
A. s orbital
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the following orbital notation is for which element? 1s 2s 2p b n f o
F. Fluorine (F has 9 electrons)
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part 4: analyze and classify look at each formula below. based on the e…
| Compound | Bond Type | |--|--| | 14. NaCl | Ionic | | 15. H₂O | Polar covalent | | 16. CO₂ | Polar covalent | | 17. F₂ | Nonpolar covalent | | 18. MgO | Ionic |
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which of the following is a reasonable electron configuration? 1s²2s²2p…
\(1s^{2}2s^{2}2p^{6}3s^{2}\)
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part 3: matching - match each bond type to its description write the le…
11. b 12. c 13. a
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part 2: multiple choice - circle the correct answer 1. which of the fol…
1. c) $O_2$ 2. c) Ionic 3. c) Polar covalent bond 4. b) Sodium and chlorine
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read the text. during world war i, british and american warships were a…
sequential
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jose needs 6.2 lb of organic blueberries to make smoothies. organic blu…
Jose incorrectly rounded $2.85$ down to $2$. The estimate should be $18$. So the correct option is: Jose incorrectly rounded $2.85$ down to $2$. The estimate should be $18$.
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a solution has a ph of 8. which best describes the solution? a strong a…
a weak base
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schemas can bias an individuals perception toward identifying specific …
C. perceptual set
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type the correct answer in the box. express your answer to three signif…
20.4
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according to the us food and drug administration (fda) what must any pr…
at least 95% organically produced ingredients
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gabriella stops into a convenience store to find a healthy snack and se…
check the bottle's nutritional label to determine if all the ingredients are healthy
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9. write the unabbreviated (full) electron configuration for the sulfid…
9. Electron configuration of $S^{2 -}$: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$, Noble gas: Ar 10. Electron configuration of Cu: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}$. It is an e…
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9 write the unabbreviated (full) electron configuration for the sulfide…
1. Electron - configuration of $S^{2 - }$: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$; Noble gas: Ar 2. Electron - configuration of Cu: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}$; Except…
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several elements are outlined on the periodic table. which of these ele…
Nitrogen, Phosphorus, Antimony
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question 5 plotting the inverse of the reactant concentration against t…
C. A second - order reaction
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b. directions select all the correct answers. several elements are outl…
Nitrogen (N), Phosphorus (P), Antimony (Sb)
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question 4 for a first order reaction, if we graph lna vs. t, we get a …
-k
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question 3 in a straight - line plot of a zero - order integrated rate …
Initial reactant concentration
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an atom of a certain element contains 9 protons and 7 valence electrons…
Part A: The element is fluorine (F) and it is highly reactive. Part B: Protons are used to identify elements and the 7 valence electrons make the element highly reactive.
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question 2 how are integrated rate laws for zero, first, and second ord…
B. They can all be plotted to generate a straight line.
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question 1 the integrated rate law shows the relationship between _____…
C. Reactant concentration; time
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10. which of the following list the elements in order, from those havin…
N, P, As, Sb, Bi
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chemical reactions 1. a is a process that changes, or , one set of comp…
1. Chemical reaction; transforms 2. Reactants; Products 3. Changes; Chemical bonds
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1. write the unabbreviated (full) electron configuration for a neutral …
1. $1s^{2}2s^{2}2p^{6}3s^{1}$ 2. Sulfur (S) 3. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$ 4. Cobalt (Co) 5. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$, it is a noble - gas configuration (full outer s…
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review the lab report conclusion and then answer the question. based on…
to record an experiment and demonstrate learning
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sketching atoms using the bohr model sketch the following atoms, placin…
| Atom | Protons | Neutrons | Electrons | Electron Distribution in Bohr - model | | ---- | ---- | ---- | ---- | ---- | | H | 1 | 0 | 1 | 1 in n = 1 | | He | 2 | 2 | 2 | 2 in n = 1…
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severe chest pain associated with coronary artery disease is diagnosed …
C. angina
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question 2 10 points each of the following sets of quantum numbers is s…
B. \(n = 4, l = 3, m_l=-2\)
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question 16 what term describes a decreased supply of oxygenated blood …
A. Ischemia
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directions: answer the 3 questions about each chemical formula on the l…
| Formula | Question 1 | Question 2 | Question 3 | | ---- | ---- | ---- | ---- | | $Fe_2Cl_3$ | 2 | 5 | 2 | | $Pb_5CaK_3Al$ | 1 | 10 | 4 | | $C_6H_{12}O_6$ | 6 | 24 | 3 | | $NO_2C…
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the average human body contains a total of 7×10^27 atoms. the table sho…
$4.181\times 10^{27}$
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what is the stretching frequency (in cm⁻¹) of the following carbonyl? 1…
1685
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in a chemical change, gases, heat, or light are often released and the …
Physical change - Definition: A substance changes in size, shape, or state, or two substances are mixed together without changing their chemical composition. Usually reversible. E…
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what is the stretching frequency (in cm⁻¹) of the following carbonyl? o…
1715
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unit 1 - earth’s abiotic systems - unit review resources to help you re…
1. Asthenosphere 2. Plate tectonics 3. Divergent 4. Subduction 5. Transform; they are sliding past each other 6. Soil 7. Humus 8. Physical 9. more; less 10. thin; harder 11. Over …
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the halogens group group #: draw the example atom and make the outermos…
- **Halogen Group**: - Family Members: F (9), Cl (17), Br (35), I (53), At (85) - 5 properties/trends: High electronegativity, 7 valence electrons, form salts with metals, non - m…
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which of the following carbonyls have a stretching frequency around 171…
The aldehyde and the ketone options have carbonyl stretching frequencies around 1715 cm⁻¹. So the correct answers are the aldehyde - containing option and the ketone - containing …
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algal blooms occur due to the presence of an excess amount of nutrients…
The nutrients are a part of the fertilizers that are often washed away into ponds.
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this is an orbital diagram for the element... (use the element symbol o…
Se
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how many electrons are in this atom? energy
17
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how many electrons are in this atom?
12
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question 11 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³6s² select state number …
state: Ground state number of electrons: 55 element: Cesium (Cs)
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question 10 1s²2s²2p⁶3s²3p⁶ select state number of electrons= select el…
state: Ground number of electrons: 18 element: Argon (Ar)
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what stretching frequencies (in cm⁻¹) are present in the structure belo…
1745
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problem give iupac names for the following cycloalkanes: 4 - 1 (a) (b) …
(a) 1,4 - dimethylcyclohexane (b) 1 - methyl - 3 - propylcyclopentane (c) isopropylcyclobutane (d) 2 - ethyl - 6 - bromobicyclo[3.2.0]heptane (e) 1 - methyl - 4 - isopropylcyclohe…
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question 9 1s²2s²2p⁶3s²3p⁶4s²3d⁶4p² select state number of electrons= s…
state: Ground state number of electrons: 30 element: Zinc (Zn)