Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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directions: each set of lettered choices below refers to the numbered s…
D. C₂H₄
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11) put a checkmark next to the description if its a chemical change or…
burning paper: $\boxed{\checkmark}$ rust forming on a metal pipe: $\boxed{\checkmark}$ baking a cake: $\boxed{\checkmark}$ activating a glowstick: $\boxed{\checkmark}$ making a sa…
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directions: each set of lettered choices below refers to the numbered s…
D. C₂H₄
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which four types of changes might occur during a chemical change? boili…
production of gas, color change, temperature change, production of light
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which two facts are about a chemical change? the change cannot be rever…
The change cannot be reversed. The change results in a new substance.
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directions: each set of lettered choices below refers to the numbered s…
A. $H_2O$
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____ is the process of matter changing to a gas. deposition vaporizatio…
B. Vaporization
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a. find the ions that make up these compounds, then the name. a few are…
1. $Ag^+, S^{2 - }$; Silver sulfide 2. $Zn^{2+}, O^{2 - }$; Zinc oxide 3. $Cu^+, F^-$; Copper(I) fluoride 4. $Cu^{2+}, Br^-$; Copper(II) bromide 5. $Mn^{2+}, Cl^-$; Manganese(II) …
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changing from a gas to a solid without going to a liquid first is calle…
C. deposition
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____ changes a solid to a gas without going to a liquid first. melting …
D. Sublimation
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____ changes a liquid to a gas from the surface of the water. condensat…
B. Evaporation
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which two facts are about physical changes? it is sometimes possible to…
It is sometimes possible to change the substance back. The substance changes size or shape but remains the same substance.
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8 mark for review type of steel % carbon characteristics uses low - car…
D. The additional carbon atoms within the alloy make it more difficult for the iron atoms to slide past one another.
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which of the following diagrams best depicts an alloy of ni and b?
A.
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which chemicals related to feelings of happiness are released when peop…
A. endorphins
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phet - building an atom link: https://phet.colorado.edu/en/simulation/b…
1. Protons change the name of the atom. 2. a. Lithium b. Helium c. Beryllium d. Helium 3. a. Proton b. Electron c. Neutron d. The number of protons must equal the number of electr…
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7. what is dissociation? 8. what is the chemical formula for water? 9. …
7. The process of a compound breaking into ions in a solvent. 8. $H_2O$ 9. An atom or molecule with a net electrical charge. 10. Hydrogen ions ($H^+$) and hydroxide ions ($OH^-$) …
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acids and bases the degree of acidity or alkalinity (basic) is importan…
1. The state of being alkaline, having a relatively high - concentration of hydroxide (OH⁻) ions. 2. Near - neutral pH of 7. 3. Homeostasis. 4. Buffers. 5. Neutralize. 6. Metaboli…
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21. is a setting technique done on very short to mid - length chemicall…
21. D. Hair pressing 22. D. no - stem 23. A. a stem 24. C. barrel 25. C. ponytail
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6 mark for review compound lattice energy (kj/mol) naf 930 mgf₂ 2978 th…
D. The charge of the Mg cation is larger than that of the Na cation.
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1. identify the ions in these chemical formulas a. sodium bromide b. ma…
a. F b. F c. F d. F e. F f. T
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1 exploration: describing a pattern (continued) c. n = 1 n = 2 n = 3 n …
| Number of rows, \(n\) | 1 | 2 | 3 | 4 | 5 | |--|--|--|--|--|--| | Number of dots, \(y\) | 2 | 4 | 6 | 8 | 10 | ### 2. Using arithmetic sequence to describe a pattern
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of the following diagrams, which best represents the structure of solid…
B.
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binary ionic compounds with transition metals transition metals have un…
Iron (Fe), Copper (Cu), Manganese (Mn), Chromium (Cr), Cobalt (Co), Nickel (Ni)
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which of the following graphs shows potential energy versus bond length…
B.
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binary ionic compounds with transition metals transition metals have un…
1. Iron (Fe): Fe²⁺ (iron(II)), Fe³⁺ (iron(III)) 2. Copper (Cu): Cu⁺ (copper(I)), Cu²⁺ (copper(II)) 3. Cobalt (Co): Co²⁺ (cobalt(II)), Co³⁺ (cobalt(III)) 4. Nickel (Ni): Ni²⁺ (nick…
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which of the following compounds has the strongest coulombic attraction…
A. \(MgO\)
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2 mark for review which of the following bonds is most polar? a f - f b…
C. O-I
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mark for review 1 which of the following can be inferred from the diagr…
B. The atoms form a bond with a bond length of 75 pm.
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question 19 of 25 what information does the specific heat capacity give…
B. How much energy is needed to raise its temperature
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eca review/hw name: binary ionic compounds with transition metals trans…
| Name | Ions | Compound Formula | |--|--|--| | lead (II) chloride | $Pb^{2 + },Cl^{-}$ | $PbCl_{2}$ | | copper (II) iodide | $Cu^{2+},I^{-}$ | $CuI_{2}$ | | Manganese fluoride | …
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which one of the following reactions is an acid - base reaction? hno₃ +…
Question 7: $HNO_3+KOH ightarrow KNO_3 + H_2O$ Question 8: calcium hydroxide and phosphoric acid Question 9: $HNO_3 - KNO_3$
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select the correct answer from each drop - down menu. 1. they decided t…
1. sustenance 2. austerity 3. transmutation 4. obscurity
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select the correct answer to the question below. when dealing with corr…
Don't separate oxidizing acids (e.g. nitric acid) from organic acids (e.g. acetic acid) and flammable/combustible materials
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select the correct answer to the question below. of the following, whic…
Keep the vertical sash below your face and do not raise above 18"
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what is the mass of an atom that has 6 protons, 7 neutrons, and 6 elect…
13
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select the correct answer to the question below. the weight of a volume…
Vapor Density
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select the correct answer to the question below. isopropanol, acetone, …
Flammable
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the periodic table of the elements organizes elements according to thei…
Be, Mg, Ca
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directions: drag the answers to the correct boxes. balance the followin…
4, 3, 2
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sodium bicarbonate (nahco3) is commonly known as baking soda. sodium bi…
It is white. It is a solid. It can dissolve in water. It releases carbon dioxide.
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question 7 why can the benedicts test not detect disaccharides? because…
Question 7: because disaccharides do not contain a carbonyl group with a double bond Question 8: A Question 9: starch
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the motion of atoms is affected by temperature. the pictures show water…
Picture 1, Picture 3, Picture 2
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question 5 10 pts which one of the following aqueous solutions has the …
Question 5: 0.01 M $H_2SO_4$ Question 6: $H_2CO_3/HCO_3^-$
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the tightness across the surface of water caused by the polar molecules…
C. surface tension
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what makes water the universal solvent? it dissolves everything it diss…
It dissolves more things than any other known substance
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in the table below, choose the numbers that fill in the blanks to make …
4, 10
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the table below gives information about the nucleus of each of four ato…
2
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what class of water pollution can cause excessive growth of algae in wa…
inorganic nutrients such as nitrogen and phosphorus
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viruses, bacteria, and parasitic worms found in water that cause diseas…
infectious agents
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nuclear and coal - burning power plants can cause what type of water po…
thermal pollution
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organic waste is especially problematic because it uses large amounts o…
manure from livestock feeding operations
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decide if ionic vs. covalent by a. if ionic, then use the name of the m…
A. Naming rule for ionic compounds. B. -ide; prefixes
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in what form is carbon found in the atmosphere? co2 c6h12o6 h2o atp
A. $CO_2$
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2. fill in the blanks to complete the rules for naming each type of ion…
Chlorite ion: $ClO_{2}^{-}$ Carbonate ion: $CO_{3}^{2 -}$
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name _ date _ period _ the other side of science refer to the page and …
1. The basic measurement of length is the meter, of volume is the liter, and of mass is the kilogram. 2. Volume is the amount of space an object occupies. 3. Matter is anything th…
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the other side of science refer to the page and answer with a complete …
1. The basic measurement of length is the meter, volume is the liter, and mass is the kilogram. 2. Volume is the amount of space of an object. 3. Matter is anything that has mass …
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which will increase the rate of a chemical reaction? adding a catalyst …
adding a catalyst
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chemistry 9/15/25 what is alchemy?
Alchemy was an ancient philosophical and protoscientific tradition that aimed at the transmutation of base metals into gold and the discovery of elixirs of immortality and health.…
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which statement best describes the relationship between activation ener…
Reducing the activation energy can increase the rate of a reaction.
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question 5 10 pts which one of the following aqueous solutions has the …
Question 5: 0.01 M $H_2SO_4$ Question 6: $H_2CO_3/HCO_3^-$
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homework chapter 2 question 17 of 17 (6 points) | question attempt: 1 o…
Compound A: Group 1 Compound B: Group 2 Compound C: Group 3
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a scientist is conducting an investigation that involves water, silver,…
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
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ec6 practice with all kinds of compounds. label each of these compounds…
| formula | Ionic or covalent? | Name | |--|--|--| | $\text{AgNO}_3$ | Ionic | Silver nitrate | | $\text{CuCl}_2$ | Ionic | Copper(II) chloride | | $\text{CaCl}_2$ | Ionic | Calci…
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question 14 of 25 what is known about a reaction with a positive enthal…
C. Heat is required to make the reaction occur.
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exercise ii. fill in the blank with the best word from the choices belo…
1. peccadillo 2. malaise 3. negligible
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determine the quantity of moles of propylene (c₃h₆) in 25.0 g of the su…
$0.594\ mol$
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question 10 of 25 which energy profile best shows that the enthalpy of …
D. Energy profile A
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question 9 of 25 which of the following reactions would result in incre…
A. $KNO_3(s) ightarrow K^+(aq)+NO_3^-(aq)$
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safety with materials a s____ d____ s____ (sds) must be provided with e…
1. Proporcionar información sobre riesgos, peligros, medidas de seguridad y primeros auxilios. 2. Químicos y materiales peligrosos. 3. En secciones que abarcan identificación, com…
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4. click on al and s atom\tvalence electrons\tmetal or nonmetal\thow ma…
| Atom | Valence Electrons | Metal or Nonmetal | How many of each atom is required to form the compound? | | ---- | ---- | ---- | ---- | | Al | 3 | Metal | 2 | | S | 6 | Nonmetal …
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question 2 of 25 under what conditions is δg for a reaction always posi…
C. When $\Delta H$ is positive and $\Delta S$ is negative
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lithium has 3 protons, 4 neutrons, and 3 electrons. an element with whi…
An element with 11 protons, 11 neutrons, and 11 electrons.
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read the poem. there are 20 lines in the poem. the poem is numbered eve…
Part A: 2. Troubles will return, but summer lets the speaker forget them for a short time. Part B: 4. "And many a scheme did she devise To heal the hurt and soothe the wrong." (Li…
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how are elements arranged on the periodic table? (1 point) they are arr…
They are arranged to highlight similarities between different elements.
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why are there empty spaces in the rows on the periodic table? (1 point)…
So that elements with similar properties are aligned in the same column.
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element arrangement quick check why is it impossible for an element to …
The atomic number is the number of protons, which is always a whole number.
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element arrangement quick check which property of an atom is described …
the number of protons
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question 3 true or false? bicarbonate ion can act as an acid and as a b…
Question 3: True Question 4: There are more hydroxide ions than hydronium ions in the solution.
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eating around chemicals in the workplace is considered safe because tod…
False
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question 8 10 pts one mole of the carbon - 12 isotope contains 6.022 x …
$4.82\times 10^{18}\ m^{3}$
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course: sip2 automotive service safety activity: module 3: safety data …
False
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chemical manufacturers must present which information on the products l…
D. All of the above
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the term route of entry on an sds refers to the way a ____ enters the b…
D. Chemical
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learning exercise 2 instructions: each of these is a common chemical fo…
Acids: Nitric (HNO3), Hydrochloric (HCl) Bases: Ammonium Hydroxide, Sodium Hydroxide Flammables: Acetone, Isopropanol, Acetylene
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(6) ride developed a love for science early. (7) her parents encouraged…
Change campaigns to campaign's
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learning exercise 1 instructions: each of the properties below describe…
Physical Property: Vapor Pressure, Melting Point, Vapor Density, Boiling Point Chemical Property: Flammability, Reactivity, Toxicity, Corrosivity (pH)
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drag each tile to the correct box. recreate the sequence that occurs in…
1. atmosphere 2. plant biomass 3. soil organic matter 4. fossil fuel 5. combustion
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how is life science useful? it helps with the development of artificial…
All of these are correct.
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which one of the following species is a base? oh- h2o2 nh4+ ch3cooh que…
Question 1: $OH^-$ Question 2: $H_3PO_4$: Acid $NH_3$: Base $H_2PO_4^-$: Amphiprotic species
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an intensive property does not depend on the amount of matter in a samp…
11. Intensive 12. Extensive 13. Intensive 14. Extensive 15. Extensive 16. Intensive 17. Extensive 18. Intensive 19. Intensive 20. Intensive
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nancy owns a gas station in a small town. her friend chuck owns the onl…
D. price fixing
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a liquid solvent is added to a flask containing an insoluble solid. the…
126.81 g
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1. what is a naturally occurring, solid, inorganic compound or element?
A mineral
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multiple - choice question what happens when an atom absorbs energy? th…
The electron jumps to the excited state.
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in chemistry, there are specific rules for writing the formulas of ioni…
iron(II) oxide ($FeO_{2}$)
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b.f. skinner was what kind of scientist? dermatologist chemist behavior…
C. Behavioral Psychologist
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multiple - choice question which color has the highest energy? green re…
C. violet
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in chemistry, there are specific rules for writing the formulas of ioni…
$TiCl_{5}$, $Fe_{2}O$
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if the caffeine concentration in a particular brand of soda is 3.67 mg/…
227