Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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making predictions about reactions complete the following equations (no…
no reaction
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making predictions about reactions complete the following equations (no…
A. $\text{AlCl}_3 + \text{Ag}$
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limiting reactants da 1. given the reaction: $ce{s + o_{2} -> so_{2}}$ …
a) $219.76\ \text{g}$ b) $173.0\ \text{g}$ c) Oxygen d) $173.0\ \text{g}$
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phase changes quiz complete 1 2 3 4 5 6 7 8 9 10 time remaini 57:55 h₂o…
from a gas to a liquid
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phase changes quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining 58:16 i…
solid turns directly into a gas, matching the description. - Evaporation is liquid to gas, freezing is liquid to solid, deposition is gas to solid, so they do not fit.
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phase changes quiz complete 1 2 3 4 5 6 7 8 9 10 the diagram below show…
A. Molecules are speeding up as boiling occurs.
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2) what is the percent yield of the reaction below if 84.0 grams of $\t…
80.8%
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in this reaction: $ce{mg(s) + i_{2}(s) -> mgi_{2}(s)}$ if 10.0 g of mg …
Approximately 84.5%
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writing formulas ( criss-cross method)directions: write the formulas of…
| | $\text{F}^-$ | $\text{O}^{2-}$ | $\text{N}^{3-}$ | $\text{S}^{2-}$ | $\text{SO}_4^{2-}$ | |--|--|--|--|--|--| | $\text{Fe}^{3+}$ | $\text{FeF}_3$ | $\text{Fe}_2\text{O}_3$ | $…
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ionic bonding 6.1-6.3 test directions: using a periodic table, fill in …
| Number of Protons (+) | Number of Electrons (-) | Overall charge | Symbol and Charge | Cation (C) Anion (A) Neutral (N) | |------------------------|--------------------------|--…
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1 pointthe smoke inhaled from a burning cigarette contains a mix of ove…
1. 7000 2. 70 3. Melanoma
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name: homework phosphorus trichloride is a slightly yellow fuming liqui…
Lewis dot diagram for $\text{PCl}_3$: ``` .. :Cl:P:Cl: .. :Cl: .. ``` (Note: The central P has one lone pair, each Cl has three lone pairs, and single bonds connect P to each Cl.)…
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baking soda, or sodium bicarbonate, is used in baking to ______ foods l…
D. encourage
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baking soda, an alkaline chemical formula, is used in baking to make ca…
D. achieve
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if human minds were as uniform as atoms of the same elements or molecul…
C. predictable
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the third type of chemical bonding, metallic bonding, occurs between me…
- Valence electrons move freely throughout a metal. - Metallic bonding occurs between metal atoms.
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1 point cigar users cannot be exposed to nicotine because they dont ful…
1. False 2. True 3. False
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chemistry resources ionic compounds can be represented by bohr model di…
A. A sodium cation has zero valence electrons. C. Both the Bohr model and the Lewis dot structure represent an ionic bond between a metal and a nonmetal. D. Valence electrons are …
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solids and plasmas quiz complete 1 2 3 4 5 6 7 8 9 10 which best explai…
cannot be pushed closer together, making the crystal incompressible. The other options are incorrect: solid molecules vibrate in place (so A is wrong), crystal molecules do not ac…
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chemistry resources covalent compounds can be represented by bohr model…
- There are two bonding electrons in a chlorine molecule. - A chlorine molecule has 14 total valence electrons.
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there are three types of chemical bonds: covalent, ionic, and metallic.…
A covalent bond forms between two **nonmetal** chlorine atoms. Before reacting, each chlorine atom has **7** valence electrons. When **2** electrons are shared, each chlorine atom…
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sodium metal (na), chlorine gas ($cl_2$) and table salt (nacl) have dif…
- electrons are transferred: bonds in table salt - electrons are shared: bond in chlorine gas
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1. $\boldsymbol{agno_2}$ |element|atoms|mass|total| | ---- | ---- | ---…
### $\text{AgNO}_3$ | Element | Atoms | Mass (g/mol) | Total (g/mol) | |---------|-------|--------------|---------------| | Ag | 1 | 107.87 | $1 \times 107.87 = 107.87$ | | N | 1 …
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1) what is the term for something that attaches dye molecules to textil…
1) A mordant is the substance 2) Iron produces dull, dark colors and can weaken fibers. 3) To remove impurities, concentrate active components, and ensure consistent, effective dy…
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when two atoms with different electronegativities form a bond, the more…
When sulfur and oxygen react, valence electrons are **shared** between the atoms because their EN difference is **less than** two. When magnesium and oxygen react, valence electro…
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chemistry resources when forming chemical bonds, metal atoms tend to lo…
- In general, metal atoms have lower electronegativities than nonmetal atoms. - When sulfur bonds to oxygen, electrons are more strongly attracted to the oxygen atom. - Atoms with…
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multiple choice questions 1. which process occurs in the suns core to r…
1. C. Nuclear fusion 2. B. Stellar life span model 3. C. Evidence of nuclear fusion and energy output 4. B. It began as a single, dense point and has been expanding ever since.
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empirical and molecular formula calculation propene has an empirical fo…
$\text{C}_3\text{H}_6$
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making activity series predictions think about it use the activity seri…
Ca₃(PO₄)₂ + Zn
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making activity series predictions use the activity series below to pre…
1. $\text{CCl}_4 + \text{Br}_2$: no reaction 2. $\text{FeSO}_4 + \text{Na}$: $\text{Na}_2\text{SO}_4 + \text{Fe}$
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is an example of○ energy transformation○ law of conservation of energy○…
- Incomplete top question: Cannot be answered without the referenced scenario. - Energy type question: A. Chemical - Mass conversion question: 0.625 kg (the corresponding option, …
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select the correct answer a chemist is performing an experiment by obse…
C. from hour 0 to hour 5
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making activity series predictions use the activity series below to pre…
no reaction
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use the activity series below to predict the products of each of the fo…
1. $\text{Na}_2\text{CO}_3 + \text{K} ightarrow \text{K}_2\text{CO}_3 + \text{Na}$ 2. $\text{ZnCl}_2 + \text{Cu} ightarrow \text{no reaction}$
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making activity series predictions use the activity series below to pre…
B. $\text{K}_2\text{CO}_3 + \text{Na}$
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mass x gravity x height is the formula for *○ kinetic energy○ mechanica…
1. Gravitational Potential Energy 2. mass, velocity (speed) 3. Sorry, the text for the third question is incomplete. Please provide the full question details to answer it.
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an experiment is to be conducted with a mass of 9.3 grams. before the e…
9.2 grams
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atoms, or atomic ions or isotopes, are made of subatomic particles: pro…
1. Compounds have the atoms of different elements. 2. A. electrons
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study this brochure from nasa, which explains in more detail the instru…
- measuring the amount of water in Jupiter's atmosphere - taking images of the planet using infrared cameras - taking chemical "fingerprints" of Jupiter's gases - mapping Jupiter'…
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part 4. forms of energy continued directions: match the energy describe…
| | | ORIGINAL ENERGY FORM | FINAL ENERGY FORM | |---|---|---|---| | 1 | Electric mixer | electrical | mechanical | | 2 | A battery that runs a moving toy | chemical | mechanical …
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7) how many liters of a 0.88 m solution can be made with 25.5 grams of …
7) $\approx 1.12$ liters 8) $\approx 0.248$ M 9) $\approx 0.448$ liters 10) $\approx 1022$ grams 11) $\approx 2.08$ M 12) $\approx 0.382$ liters 13) $\approx 31.2$ M
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name _______________date 02/10/2026per ______hw balancing chem equation…
### Definitions: - **Synthesis**: A reaction where two or more reactants combine to form a single product. - **Combustion**: A reaction where a substance reacts with oxygen, typic…
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which of these pairs of particles will experience the greatest coulombi…
Be and O
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anion formation electron interactions when atoms gain electrons to form…
Electron repulsion between the second and third energy levels.
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anion formation nuclear charge when atoms gain electrons to form anions…
It decreases because the positive nuclear charge is distributed over more electrons.
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what term is used to describe the phenomena occurring when valence elec…
A. Shielding
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iron(iii) thiocyanate spectroscopy iron in solution the unknown sample …
2.18 x 10²¹ atoms
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iron(iii) thiocyanate spectroscopy percent composition calculate the pe…
about 49.0%
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iron(iii) thiocyanate spectroscopycalibration curvethe student creates …
about 0.0360 M
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iron(iii) thiocyanate spectroscopywavelength of maximum absorbancethe s…
green: 480-560 nm
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iron(iii) thiocyanate spectroscopy dilution process the student creates…
Step 2: You should use a graduated cylinder or pipette for measuring the stock solution.
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iron(iii) thiocyanate spectroscopy dilution iron(iii) reacts with scn⁻ …
60.0 mL
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iron(iii) thiocyanate spectroscopychemical or physical changethe image …
Chemical: A color change indicates a new compound forms.
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11. $\text{br}_3\text{o}_2$12. $\text{n}_5\text{cl}_3$13. $\text{p}_6\t…
11. Tribromine dioxide 12. Nitrogen trichloride 13. Hexaphosphorus decafluoride 14. Tetraiodine heptasulfide 15. Octafluorine pentoxide
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bronze analysis percent copper the number of moles of copper in the sol…
0.447%
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bronze analysis moles of copper the overall concentration of the copper…
3.55 x 10⁻⁴ moles
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question 5 in a science experiment, corine rounded the mass of a chemic…
B) 21.647 grams
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bronze analysis unknown concentration the inspector generates a calibra…
0.00355 M
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bronze analysis dissolving the bronze he then dissolves a 5.05 gram bea…
B. 40. mL
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bronze analysis wavelength of maximum absorbance the blue copper(ii) io…
A. 600-640 nm
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graphical interpretation of acceleration wednesday, january 21, 2025 ch…
### For the particle $v_x=(40-5t^2)\ \text{m/s}$: (a) Average acceleration: $\boldsymbol{-10\ \text{m/s}^2}$ (b) Instantaneous acceleration at $t=2.0\ \text{s}$: $\boldsymbol{-20\…
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bronze analysis experimental components a small engine manufacturer ord…
D. The copper because the solution absorbs blue light.
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8/20 what is a homogeneous mixture? a mixture where small particles rem…
B. A mixture where components are evenly distributed
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read the text, then answer the questions. did you know that in 2007, th…
C. to inform readers about some problems associated with bottled water
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when different atoms combine ______ are formed. compounds elements hete…
compounds
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bronze analysiselectron configurationthe alloy bronze is a mixture of a…
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p²
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7. choose the correct answer. nuclear power plants create ____ waste, w…
7. radioactive 8. Natural gas
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19. what is a heterogeneous mixture? a mixture where components are eve…
19. A mixture where substances are not evenly spread out 20. elements that make up compounds.
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16. which of the following are considered heterogeneous mixtures: (a) _…
16. (a) cereal, (b) paint, (c) salad dressing 17. An element 18. - gold (Au): Element - granite rock: Heterogeneous mixture - Calcium carbonate ($CaCO_3$): Compound - air: Homogen…
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13. what is matter?anything that takes up space and has massa substance…
13. Anything that takes up space and has mass 14. a chemical formula. 15. Mixtures
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9. when different atoms combine _______ are formed. compounds elements …
9. compounds 10. False 11. aluminum 12. Two or more elements chemically combined
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7. what is an element? a substance with fixed composition two or more e…
7. The simplest form of matter from which more complex substances are made 8. A mixture where components are evenly distributed
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a substance that consists of just one type of atom a small particle tha…
1. Matching terms: - Element: a substance that consists of just one type of atom - Atom: a small particle that is a building block of matter - Mixture: a combination of two or mor…
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1. what is the difference between an element and a compound? 2. which o…
1. An element is a pure substance composed of only one type of atom, while a compound is a pure substance made of two or more different types of atoms chemically combined in a fix…
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1. choose the correct answer. ____ helps create smog. noise flooding sc…
Gasoline --- ### For Question 2:
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mix and match choose the correct response battery fluid, acid ii 173.20…
- Battery fluid, acid → proper shipping name - II → packing group - 173.202 → where you go for packaging instructions of non-bulk shipments - 172.102 A3, A7, B2, B15, IB2, N6, N34…
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consider the reaction of ethanol $c_2h_5oh$ and $o_2$ shown in the acco…
## Part A: $\text{C}_2\text{H}_5\text{OH}(l) + 3\text{O}_2(g) ightarrow 2\text{CO}_2(g) + 3\text{H}_2\text{O}(l)$ ## Part B: $\text{C}_2\text{H}_5\text{OH}$
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gasoline is burned in cars to give them energy. what kind of energy is …
chemical potential energy
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is the particle below paramagnetic or diamagnetic? $ce{zn^{2+}}$ parama…
diamagnetic
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what is the electron configuration for this particle? cl⁻ 1s²2s²2p⁶3s²3…
1s² 2s² 2p⁶ 3s² 3p⁶
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what is the electron configuration for this particle? $\text{sr}^{2+}$ …
$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^6$ (the second option)
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which particle is not isoelectronic with the electron configuration giv…
Br
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is the particle represented by the electron configuration below paramag…
paramagnetic
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what element does this pes represent? photoelectron spectrum a. sc b. c…
B. Ca
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is the particle below paramagnetic or diamagnetic? $ce{ni^{2+}}$
Paramagnetic
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2.solar energy refers to radiant energy produced by the ______.solar en…
2. sun; solar; electrical; greenhouse gas emissions/pollution; sun 3. turbines; electrical; greenhouse gas emissions/pollution; reliable; land; visually unappealing 4. moving wate…
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1. what is residual chlorine? a. chlorine used to disinfect b. the amou…
1. b. the amount of chlorine after the demand has been satisfied 2. a. disinfectant by-products 3. c. volatile organic compounds 4. b. iodine 5. (Incomplete options provided; stan…
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name: ___________________________ teacher: ___________________________q…
1. (B) 2. The student confused an intramolecular covalent O-H bond (A) with an intermolecular hydrogen bond; hydrogen bonds are intermolecular attractions between molecules, not b…
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9) a container holds three gases: oxygen, carbon dioxide, and helium. t…
1. $9.00\ \text{atm}$ 2. $83.67\ \text{kPa}$ 3. $93.95\ \text{kPa}$ 4. $P_{O_2} = 0.0999\ \text{atm}$, $P_{He} = 0.800\ \text{atm}$ 5. $\approx 6.07\ \text{g/L}$ 6. $P_{N_2} = 0.1…
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how did the work of dmitri mendeleev differ from that of john newlands …
Mendeleev predicted elements that would later be discovered.
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which scientist established the law of octaves? antoine lavoisier dmitr…
D. John Newlands
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which is classified as an inner transition element?calciumcopperfermium…
fermium
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members of which group easily lose an electron to form a +1 cation?○ ha…
alkali metals
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what is the chemical symbol for magnesium? ○ mo ○ mn ○ mg ○ md
C. Mg
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who wrote the first modern chemical textbook? antoine lavoisier dmitri …
Antoine Lavoisier
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who is credited with creating the first periodic table? johann doberein…
Dmitri Mendeleev
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which element has the greatest average atomic mass? ○ iodine ○ bromine …
tellurium
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which is another name for groups of elements?○ actinides○ families○ hal…
B. families
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which property would cesium most likely have?○ it is hard.○ it is ducti…
B. It is ductile.
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central idea the haudenosaunee confederacy has a grand council made up …
The Haudenosaunee Confederacy has a Grand Council made up of **sachems/representatives from each nation** who work together to make **collective decisions/laws** for the clan. The…