Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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name: date: period: homework: intensive and extensive properties 1. whi…
Extensive properties are based on the size of a sample. ### Question 2
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1. which set of properties, intensive or extensive, are based on the si…
Extensive properties are based on the size of a sample.
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complete the rhyme scheme. a a b b c the great bare tree looked down an…
1. A 2. B 3. A 4. B 5. C
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complete the rhyme scheme. a b b c c \who planted this old apple - tree…
1. A 2. B 3. A 4. B 5. B
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complete the rhyme scheme. a b b c i had not known before forever was s…
1. I had not known before: A 2. Forever was so long a word: B 3. The slow stroke of the clock of time: C 4. I had not heard: B
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unit 3: atomic structure 16. if an atom has 23 electrons and an atomic …
a) 23 b) 28 c) Vanadium (V) d) Isotope symbol: $\ce{^{51}_{23}V}$; Isotope name: Vanadium-51 --- ### Problem 17
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give the element symbol for the atom pictured below. symbol protons: ne…
$\text{H}$
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give the element symbol for the atom pictured below. symbol protons: ne…
Li
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give the element symbol for the atom pictured below. symbol protons: ne…
Li
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activity: practice balancing chemical equations balance the equations a…
1) Balanced equation: $\boldsymbol{1\text{N}_2 + 3\text{H}_2 \longrightarrow 2\text{NH}_3}$; Reaction type: **Synthesis (Combination)** 2) Balanced equation: $\boldsymbol{2\text{N…
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Question was provided via image upload.
s: 1. i. Cu 2. g. Bi 3. h. Nd 4. j. B 5. f. Fr 6. e. Pt 7. c. K 8. a. Cf 9. d. Ge 10. b. Db
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13. match the item with the best unit for its measurement. a. coin’s wi…
a. 3. mm b. 1. km c. 4. M d. 2. cm --- ### Question 14
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answer the questions based on the data from the video lab. 1) for every…
1) 2 units 2) $\ce{2H_{2}(g) + O_{2}(g) -> 2H_{2}O(l)}$ 3) $\ce{2H_{2}O(l) -> 2H_{2}(g) + O_{2}(g)}$ (electrolysis) 4) They move to the negative cathode electrode. 5) They move to…
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as the temperature of an environment increases, the rate of chemical we…
C. increase
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answer the questions based on the data from the video lab. 1) for every…
1. 2 units of hydrogen gas 2. $2H_2(g) + O_2(g) ightarrow 2H_2O(l)$ 3. $2H_2O(l) ightarrow 2H_2(g) + O_2(g)$ (electrolysis of water) 4. Hydrogen ions move to the cathode (negative…
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in the ppm lab, the dilution began with (beaker 1) at a 10/10 concentra…
100% concentration
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concentrations can be expressed as a ratio. for example, if a solution …
1:100
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4. natural gas burns on a stove to heat food. type of change: explanati…
Type of change: Chemical change
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10. what kind of material is found in the c horizon of a soil profile? …
The option with "partially weathered parent material" (the right - most option among the four visible options in the image).
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part 3: sorting real - world changes place each situation in the correc…
### Physical Changes: - Ice melting in a cup - Crushing a can - Evaporation of rubbing alcohol ### Chemical Changes: - Photosynthesis in a plant - Food spoiling - Combustion of ga…
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part 3: sorting real - world changes place each situation in the correc…
### Physical Changes: - Ice melting in a cup - Crushing a can - Evaporation of rubbing alcohol ### Chemical Changes: - Photosynthesis in a plant - Food spoiling - Combustion of ga…
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3. co₂(s)→co₂(g) type of change:
Sublimation (or Physical Change - Sublimation)
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2. zn(s) + hcl(aq) → zncl₂(aq) + h₂(g) type of change: ______ 3. co₂(s)…
Chemical change (specifically single - displacement reaction) ### Question 3:
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7 fill in the blanks to complete the sentences. not all the words will …
### First Sentence: - The first blank: The Sun emits "energy" (in the form of electromagnetic radiation) that travels to Earth. So the first blank is "energy". - The second blank:…
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part 2: using chemical formulas as evidence for each change below: - de…
Type of change: Physical change
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5 which statement supports the idea that water molecules in ocean waves…
A. Ocean waves move in a transverse pattern (Note: There seems to be an issue as only this option supports the idea among the given ones, but the question asks to choose two. Mayb…
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part 2: using chemical formulas as evidence for each change below: - de…
Physical change (because the chemical formula remains $\ce{H2O}$, only the phase changes from liquid to gas, no new substance is formed). ### 2. Analysis for $\boldsymbol{\ce{Zn(s…
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1 what happens to a molecule after it passes energy on to the next mole…
C. It returns to its original resting position
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question 7 (3 points) you receive an order for 125 ml of 4% acetic acid…
\( 6.7 \)
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1. a puddle of rainwater slowly disappears on a warm sidewalk. type of …
Type of change: Physical change
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when are parts per million and parts per billion used as measurements? …
When measuring concentrations that are smaller than 1%
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in the 1970s, what element was removed as an additive from gasoline? zi…
lead (the option corresponding to "lead" among the choices)
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in the 1970s, what element was removed as an additive from gasoline? zi…
C. lead
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the molecular formula is $\\ce{c6h12o6}$ because one molecule actually …
| Formula | Numbers of atoms | |---------|------------------| | $\text{CaCl}_2$ | $\text{Ca}=1; \text{Cl}=2$ | | $\text{CO}_2$ | $\text{C}=1; \text{O}=2$ | | $\text{H}_2\text{O}$ …
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2. a bicycle left outside develops rust after several weeks. type of ch…
Type of change: Chemical change
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classify the following compounds as ionic, or covalent hint: if the fir…
| Formula | Type of Compound | Formula | Type of Compound | |-----------|------------------|-----------|------------------| | $CaCl_2$ | Ionic | $MgO$ | Ionic | | $CO_2$ | Covalen…
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______ is a deadly, colorless, odorless gas that is a by-product of inc…
D. Carbon Monoxide
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which of the following forms an acid in the atmosphere? nitrogen oxides…
A. nitrogen oxides
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part 1: analyze the scenario for each situation below: - decide whether…
### Type of change: Physical change (specifically a phase change - evaporation) ### Explanation: When a puddle of rainwater disappears on a warm sidewalk, the water is undergoing …
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part 1: analyze the scenario for each situation below: - decide whether…
Type of change: Physical change
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gas → liquid solid → liquid are changes in state of matter physical or …
s: 1. P 2. P 3. C 4. P 5. P 6. C 7. C 8. C 9. P 10. P 11. P 12. C
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1. the quantity of work equal to one joule is also equivalent to which …
c. (watts)(s) ### Question 2
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decide if the following are physical (p) or chemical (c) changes: _____…
s: 1. C 2. P 3. C 4. P 5. P 6. C 7. P 8. C 9. P 10. P 11. P 12. C 13. C 14. P (if the last is about melting metal)
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what contributes to the high level of biodiversity found in wetlands? a…
d. all of the above
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homework: physical and chemical changes decide if the following are phy…
chemical ### 2. Condensation of water: $\ce{H_{2}O_{(g)} -> H_{2}O_{(l)}}$ Only state (gas to liquid) changes, no new substance.
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introduce a famous person who inspires you and use a colon to quote som…
"Marie Curie, the groundbreaking physicist and chemist who broke barriers for women in science: 'Nothing in life is to be feared, it is only to be understood. Now is the time to u…
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secondary pollutants are produced when primary pollutants are released …
B. photochemical smog (assuming the options are labeled as A. oxygen, B. photochemical smog, C. carbon, D. nitrogen)
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which of the following is not an example of particulate matter? soot du…
D. carbon monoxide
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ozone the pollutant and sulfuric acid are pollutants that are not relea…
Secondary pollutant
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vocs are air pollutants. what does voc stand for? volatile organic comp…
A. Volatile Organic Compounds
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drying fruit usually means applying heat, which usually causes deformat…
C) the method's ability to achieve consistent dehydration at ambient temperature suggests potential for specialized industrial uses where preservation of color and shape is critic…
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a recent study reports that ionic liquids—which have the potential to s…
C) the concept of planetary habitability may need to expand beyond current criteria to include certain environments where liquid water cannot exist.
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what is the iupac name of the molecule? the name is: 3,6 - diethyl - 5 …
C. 4,7-diethyl-5-isobutyl-2-methylnonane
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maxwell elect the correct iupac name for the branched chain alkane. the…
4-ethyl-5,6,8-trimethyldecane
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organic chemistry maxwell select the correct iupac name for the branche…
3,5-dimethyl-7-(2-methylpropyl)tridecane
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directions: using the picture, come up with four words that rhyme with …
### For "stew" (rhyming words): 1. Identify the rhyme scheme: The word "stew" has the vowel sound /uː/ (or similar, depending on accent) and the ending -ew. 2. Generate words with…
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which statement is the most effective claim? - organic foods are a heal…
A. Organic foods are a healthier option than conventional foods.
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which is a characteristic of mixtures? they can be classified as pure s…
The correct option is: They can be separated by physical processes.
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a solid precipitate is formed from the reaction of lead nitrate and sod…
filtration
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which method would be best for separating the components of a mixture t…
C. distillation
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the chemical formula for an emerald is $\\ce{be_{3}al_{2}(sio_{3})_{6}}…
B. a pure substance because it is a compound.
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which is a substance that is made up of only one type of atom? element …
A. element
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a teacher makes this statement. \gasoline boils at a relatively low tem…
A. distillation of a mixture
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bromine, a liquid at room temperature, has a boiling point of $58^{circ…
C. pure substance
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which is a pure substance? soda carbon dioxide gasoline salt water
carbon dioxide
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which best describes an element? a type of a mixture; a pure compound; …
D. a pure substance (assuming the last option is labeled D; if the labels are different, adjust the label but keep the text "a pure substance")
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6) on a separate sheet of paper, write out the problem using all the st…
$34\ \text{mol}$ --- ### For Question 6:
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how many moles of bromine are needed to create 5.0 moles of phosphorus …
7.5 mol
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what caused this kind of weathering? (select the best answer) chemical …
Differential Weathering
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9) choose the best answer. in the synthesis reaction $2h_2 + o_2 \ ight…
1. Balanced equation: $4\text{Fe}(s) + 3\text{O}_2(g) ightarrow 2\text{Fe}_2\text{O}_3(s)$ 2. 6 mole ratios: $\frac{4\ \text{mol Fe}}{3\ \text{mol O}_2}$, $\frac{3\ \text{mol O}_2…
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lohse chem 181 15. express the following d and appropriate units. $d = …
$2.214\ \text{g/mL}$
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2. all elements are composed of extremely small particles called: a. co…
c. Atoms
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*target # 1- identify the structures and properties of matter by explai…
a. Elements
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14. how many neutrons does an atom of the isotope copper - 65 have?
36
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name the functional group shown in each molecule below. the first answe…
alkyne ### Third Molecule (Amine)
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3. use the periodic table to choose the best answer. which of these is …
D. $\boldsymbol{\ce{H - \underset{\Large{\boldsymbol{\cdot \cdot}}}{N} - H\\ \quad \mid\\ \quad H}}$
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6. choose the best answer using the periodic table. what is the name of…
iron (III) oxide
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3) choose the best answer. ____ is the process in which an atom or ion …
3) Oxidation 4) Reduction 5) oxidizing 6) reducing
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1) choose the best answer. which type of reaction occurs when two eleme…
1. A. synthesis 2. C. combination 3. D. $\text{2KCl}(s) ightarrow \text{2K}(s) + \text{Cl}_2(g)$
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1. choose the best answer. when the following equation is balanced, wha…
1. 5 2. Solid copper and silver nitrate, dissolved in water, react to form aqueous copper (II) nitrate and solid silver.
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annotation requires the following 1. number paragraphs 2. write a summa…
1. Paragraph 1: Chemical bonds are forces of attraction that hold atoms together in compounds by transferring or sharing electrons. 2. Paragraph 2: Atoms seek stability by filling…
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match the vocabulary term with the definition. open for help. fossil fu…
a general term for any hydrocarbon that can be used as fuel: chiefly petroleum, natural gas, and coal, which are derived from ancient organic matter (the corresponding definition …
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q15. choose the best answer. the coefficients of a balanced chemical eq…
## Question 14: 1. composition stoichiometry is the study of the relationship between the quantities of the elements in a compound. 2. reaction stoichiometry is the study of the r…
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11. choose the best answer. scientists discover the percent composition…
12. C. 36.04% 13. For every 100 g of FeSO₄, there are 21.1 g of S.
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what compound contains the highest percent composition of cobalt? \\(\\…
1. $\text{Co(NO}_2\text{)}_2$ 2. graham crackers 3. $6.02 \times 10^{23}$
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unit 6 quiz 1 chemistry (2nd edition) - semester b / unit 6 - stoichiom…
1. 3.22 × 10²³ molecules 2. 58.44 3. 373.88 4. when the limiting reactant is used up
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question (part banning) - semester 6 / unit 6 - stoichiometry q19. choo…
1. $\boldsymbol{5.1 \times 10^{22}}$ molecules 2. Na: $\boldsymbol{39.34}$%, Cl: $\boldsymbol{60.66}$% 3. Rb: $\boldsymbol{90.93}$%, O: $\boldsymbol{9.09}$%
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a student compared a mole of ethane, c₂h₆ molecules, to a mole of acety…
- Both samples have an equal number of carbon atoms. - Both samples have an equal number of molecules.
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what is the final product of the sequence shown? chemical reaction and …
A. The structure with the alkyl chain and -OH group as shown in option A (matching the product of Grignard addition to aldehyde followed by protonation).
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what is the product of the sequence shown? (chemical reaction sequence …
D. \(\boldsymbol{\text{Cyclopentyl - CH(OH) - CH}_3}\) (the structure corresponding to option D)
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which reagents would you use to accomplish the following transformation…
c. 1. \( \text{CH}_3\text{MgBr} \), 2. \( \text{H}_3\text{O}^+ \)
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which carbonyl compound would you treat with nabh₄ to produce the alcoh…
C. The ketone with a phenyl ring and a methyl group attached to the carbonyl carbon (acetophenone - type structure)
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which statement about this reaction is correct? 1. lialh₄ 2. h₃o⁺ a. th…
b. The products are diastereomers, formed in approximately equal amounts.
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multiple choice 1 point what is the major organic product obtained from…
A. The ketone - containing compound (the structure with the carbonyl group on the second carbon of the 5 - carbon chain, with a methyl and an ethyl group attached to the carbonyl …
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8. the diameter of a titanium atom (ti) is 0.294 nm. express this measu…
a. $2.94 \times 10^{-10}\ \text{m}$
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melanie began studying a sample of the chemical element einsteinium-253…
Every day, $\boldsymbol{4}$% of mass is $\boldsymbol{subtracted from}$ the total mass of the sample.
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calculate the molar mass of each of the following compounds, then deter…
1) Percent composition of CO: Carbon = 42.88%, Oxygen = 57.12% 2) Percent composition of $\text{C}_2\text{H}_6$: Carbon = 79.89%, Hydrogen = 20.11% 3) Percent composition of Fe in…
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select the correct answer option: which explanation best explains why e…
The paint cans are airtight and prevent evaporation of residual chemicals.
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7. how many cubic centimeters (cm³) are there in 1.00 in³? a. 0.0609 cm…
d. $16.4\ \text{cm}^3$
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which of the following molecules are deprotonated by ethyl magnesium br…
E. All of the above