Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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what is it called when a liquid turns into a solid? vaporization freezi…
freezing
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2/10 how many oxygen atoms are in $ce{al_{2}(so_{4})_{3}}$? 1. 12 2. 7 …
1. 12
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multiple-choice question what is it called when a gas changes into a li…
condensation
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1. list the factors that affect chlorination of drinking water? 2. desc…
1. The factors affecting drinking water chlorination are: pH level, water temperature, chlorine dosage, contact time, presence of organic matter, water turbidity, and presence of …
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multiple-choice question what is it called when a liquid changes into a…
vaporization
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7. drew added yeast and sugar to room temperature water and placed it i…
B. The mass of the flask/balloon after the reaction should be the same as before the reaction since matter is neither created nor destroyed.
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multiple-choice question what is it called when a solid changes to a li…
melting
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6. students are given a sample of an unknown material. they want to per…
burning it producing a change in thermal energy
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5. a chemical formula is shown below: $(nh_4)_3po_4$ how many atoms, in…
20
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what are the charges of the following transition metals?iron (ii) _____…
### Ion Charges: Iron (II): $+2$ Tin (IV): $+4$ Cobalt (II): $+2$ Palladium (I): $+1$ Lead (II): $+2$ Copper (I): $+1$ Vanadium (IV): $+4$ Platinum (II): $+2$ Manganese (III): $+3…
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use your periodic table to predict the charges of the following ions: b…
$\text{Be}^{2+}$, $\text{I}^-$, $\text{Ar}$, $\text{Na}^+$, $\text{Cl}^-$, $\text{Ca}^{2+}$ $\text{O}^{2-}$, $\text{K}^+$, $\text{F}^-$, $\text{S}^{2-}$, $\text{P}^{3-}$, $\text{M…
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study the chemical equation. na + cl₂ → nacl is the chemical equation p…
No. There are two chlorine atoms on the reactant side and only one chlorine atom on the product side.
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4. the chemical formula for methane is $\text{ch}_4$. which statement d…
Four molecules of methane would contain 4 atoms of carbon and 16 atoms of hydrogen.
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9. which of the following groups contains members with similar chemical…
C. Cu, Ag, Au B. C, N, O donate 2 electrons gain 2 electrons donate 1 electron does not gain or lose donate 1 electron gain 1 electron donate 1 electron gain 1 electron does not g…
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1. the best friends club uses \invisible ink\ to write notes to each ot…
chemical change
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9. which of the following groups contains members with similar chemical…
C. Cu, Ag, Au B. C, N, O donate 2 electrons gain 2 electrons donate 1 electron does not gain or lose donate 1 electron gain 1 electron donate 1 electron gain 1 electron does not g…
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3. based on the balanced chemical equation below, how many grams of $hg…
48 g
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answer the following questions over the relatedness of elements in the …
1. B silicon 2. C strontium 3. H helium 4. B lithium 5. D iodine 6. C helium 7. B phosphorous 8. D tin
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a spill occurs in the lab. the teacher asks whether it was a compound o…
It is a mixture because compounds do not separate on their own.
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romeo and juliet act 1 scene 5 sonnet analysisname: aynadavostep 1: ass…
### 1. Yellow (Religious Imagery) - Underline these phrases: - holy shrine - gentle sin - blushing pilgrims - Good pilgrim - mannerly devotion - saints - pilgrims' hands - holy pa…
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why are there 2 fluorine atoms in this bond? click all that apply. 3 an…
- Calcium has 2 valence electrons to "give away." - One Fluorine atom only needs 1 electron. - Calcium and Fluorine both need a full outer shell in order to become stable.
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the ancient egyptians are famous for their mummies. they had an elabora…
1. moss 2. bacteria 3. oxygen
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○ ionic bond and monolithium fluoride ○ covalent bond and lithium monof…
O ionic bond and Monolithium fluoride
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the ancient egyptians are famous for their mummies. they had an elabora…
1. moss 2. bacteria 3. oxygen
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use criss-cross method to write the formula for each of the following. …
5. $\text{K}_3\text{N}$ 6. $\text{CaI}_2$ 7. $\text{Sr}_3\text{P}_2$ 8. $\text{Al}_2\text{Se}_3$ 9. Magnesium nitride 10. Strontium fluoride 11. Lithium phosphide 12. Cesium nitri…
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* indicates required question question 2 what is the name and the type …
Magnesium transfers electrons to chlorine; magnesium chloride is the name
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6. if you start with 2.1 moles of cr, how many molecules of pb will be …
$9.48 \times 10^{23}$ molecules of Pb (rounded to three significant figures)
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nomenclaturezalia.james8051@g.gcpsk12.org switch account* indicates req…
ionic bond and IUPAC name is sodium bromide
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the pythagorean theorem in three dimensions chem tech makes paper cones…
8.8 cm (corresponding to the option: ○ 8.8 cm)
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5. if you start with 65 grams of $\text{mg(clo}_3\text{)}_2$, how many …
Approximately 1.0 moles (or 1.02 moles) of $\text{O}_2$ will be produced.
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homework: show the electron transfer for the following compounds. write…
1. Electron transfer: $3\text{Li} ightarrow 3\text{Li}^+ + 3e^-$; $\text{N} + 3e^- ightarrow \text{N}^{3-}$; Formula: $\text{Li}_3\text{N}$ 2. Electron transfer: $2\text{K} ightar…
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draw valid resonance structures for the compound shown below. use curve…
1. First resonance structure: $\ce{H2C=CH-\overset{-}{C}H-CHO}$ 2. Second resonance structure: $\ce{H2C=CH-CH=\overset{-}{O}}$ (With curved arrows showing electron flow: from the …
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electron transfer first, draw the dot diagram of the two elements makin…
1. First, draw the dot diagram of the two elements making the compound (shows # of **valence** electrons) 2. Second, use the **cation (metal)** to fill the empty spaces for the **…
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practice: ions, cations, anions & polyatomic ions part a: identify the …
## Part A: Identify the Type 1. $\text{Na}^+$: cation 2. $\text{Cl}^-$: anion 3. $\text{NH}_4^+$: polyatomic ion 4. $\text{SO}_4^{2-}$: polyatomic ion 5. $\text{Ca}^{2+}$: cation …
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mid-term exam which of the following is an allusion? when i won the sci…
Professor Anderson is such a Scrooge.
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metalloids multiple-choice question the metals are located to the left …
to the left of the staircase, or zigzag, line.
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lesson question formulate an investigative question in this lab, you wi…
How does knowing the reactants and **products** help you classify a chemical reaction?
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how do you know there was a chemical reaction? check all indicators bel…
synthesis.
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warm-up active review analyze and classify a chemical reaction how do y…
## Checked indicators: - A solid precipitate formed. - The color changed. ## Fill-in-the-blank answers: - The reactants are oxygen and iron - The product is iron oxide
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the behavior of gases color by numbers directions: answer each question…
1. A. the volume increases (orange) 2. B. the volume increases (red orange) 3. A. the pressure decreases (yellow green) 4. B. increases (blue) 5. C. motion (yellow) 6. C. the pres…
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balancing chemical equations balance the equations below: 1) ____ $\tex…
1. $1\text{N}_2 + 3\text{H}_2 ightarrow 2\text{NH}_3$ 2. $2\text{KClO}_3 ightarrow 2\text{KCl} + 3\text{O}_2$ 3. $2\text{NaCl} + 1\text{F}_2 ightarrow 2\text{NaF} + 1\text{Cl}_2$ …
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warm-up active review analyze and classify a chemical reaction fill in …
The reactants are **iron, oxygen, and water**, and the product is **iron oxide (rust)**
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an element with mass 310 grams decays by 8.9% per minute. how much of t…
56.5 grams
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types of reactions quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining 43…
combustion
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the formation of which product(s) will most likely be observed in a com…
an oxide
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types of reactions quiz complete time remaining 45:26 considering the a…
$\boldsymbol{2AgNO3 + Ni ightarrow Ni(NO3)2 + 2Ag}$
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types of reactions quiz complete 1 2 3 4 5 6 7 time remaining 46:27 whi…
Substance XYZ breaks down into X, Y, and Z.
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types of reactions quiz complete 1 2 3 4 5 6 time remaining 47:32 a dou…
ions are exchanged between two compounds.
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types of reactions quiz complete 1 2 3 4 5 time remaining 47:58 in whic…
synthesis
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acidity changes after dry ice is added time (sec) ph of solution a ph o…
The pH of solution A decreases, and the pH of solution B decreases.
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types of reactions quiz complete 1 2 3 time remaining 49:03 propane bur…
B. combustion
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selection testliterary response and analysisthe prisoner who wore glass…
1. A. Hard, cold, cruel 2. G. They are political prisoners. 3. C. a person who wears glasses 4. G. He is twenty years older than the warder. 5. D. A large and chaotic one 6. J. "Y…
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chatgpt- biologically important- epimers differ at one carbon- cyclizat…
1. Aldoses are monosaccharides with an aldehyde group (-CHO) at one end, while ketoses are monosaccharides with a ketone group (C=O) in the carbon chain. 2. Epimers are stereoisom…
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can be recovered from 25.0 g of $ce{fe_{2}o_{3}}$? $\boldsymbol{17.5g}$…
109 g
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types of reactions quiz complete 1 2 time remaining 54:09 a chemical re…
synthesis
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types of reactions quiz complete time remaining 54:27 considering the a…
no reaction
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types of reactions quiz complete time remaining 55:50 sodium chloride r…
double replacement reaction.
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describing the formation of planetesimals and protoplanets which statem…
- Both involve the formation of solid particles from nebular materials. - Both involve the trapping of gases and the clumping of masses of matter.
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24 multiple choice 1 point as a result of the discovery of radioactive …
nuclear weapons testing.
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types of reactions quiz complete time remaining 59:55 1 sodium chloride…
double replacement reaction.
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identify the following elements by the valence electron configuration b…
$2s^1$: Lithium (Li) $3d^64s^2$: Iron (Fe) $3d^{10}4s^2$: Zinc (Zn) $2s^22p^5$: Fluorine (F) $6s^2$: Barium (Ba) $4d^{10}5s^25p^2$: Tin (Sn) $3s^23p^5$: Chlorine (Cl) $4d^{10}5s^2…
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draw the orbital box diagram and the valence electron notation for the …
### Table Elements: 1. **Noble gas in period 2 (Neon, Ne):** Valence notation: $2s^2 2p^6$ Orbital box (valence): $2s: \boxed{\uparrow\downarrow}$; $2p: \boxed{\uparrow\downarrow}…
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chemistry name unit 5b prequiz review i. provide formulas for each comp…
## Part I: Formulas for Compound Names 1. $\text{LiF}$ 2. $\text{Ca(OH)}_2$ 3. $\text{Al}_2(\text{SO}_3)_3$ 4. $\text{Mn}_3(\text{PO}_4)_4$ 5. $\text{Co(NO}_2\text{)}_3$ 6. $\text…
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an element with mass 210 grams decays by 8.3% per minute. how much of t…
59.3 grams
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an element with mass 780 grams decays by 16.3% per minute. how much of …
# Explicación: ## Paso 1: Identificar la fórmula de desintegración La desintegración exponencial se calcula con: $$A(t) = A_0(1 - r)^t$$ Donde $A_0 = 780$ g (masa inicial), $r = 0…
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question an element with mass 780 grams decays by 16.3% per minute. how…
38.8 grams
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a. using trends found in the periodic table such as valence electrons, …
## a. Formation of Carbon Dioxide: Carbon (Group 14, 4 valence electrons) forms two double covalent bonds with two oxygen atoms (Group 16, 6 valence electrons each). Each oxygen s…
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identifying reaction types & balancing equations step 1: name the type …
1. $1\text{N}_2 + 3\text{H}_2 ightarrow 2\text{NH}_3$ 2. $2\text{KClO}_3 ightarrow 2\text{KCl} + 3\text{O}_2$ 3. $2\text{NaCl} + 1\text{F}_2 ightarrow 2\text{NaF} + 1\text{Cl}_2$ …
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7. sodium nitride a) $nano_3$ b) $nan$ c) $nan_3$ d) $na_3n$ 8. iron(ii…
7. d) $\text{Na}_3\text{N}$ 8. a) $\text{FeO}$ 9. d) calcium carbonate 10. a) aluminum bromide 11. c) barium phosphate 12. c) iron(II) nitrate 13. c) calcium nitrate
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17) a student reports 12.345678 g using a balance measuring to 0.01 g. …
The reported value 12.345678 g has too many decimal places. The balance only measures to 0.01 g, so the measurement should only be reported to two decimal places (e.g., 12.35 g).
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1. every year, there are only a handful / thousands of earthquakes all …
1. thousands 2. tectonic plates 3. inflexible 4. tectonic 5. fault 6. mountains 7. seismograph 8. Magma 9. more 10. potential 11. 3 12. epicenter 13. Search and rescue dogs (or he…
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20) matching freezing point of water: 32° 0° 273 (celsius / kelvin / fa…
### Matching (Freezing point of water): $32^\circ$: Fahrenheit $0^\circ$: Celsius 273: Kelvin ### Conversions: 21) $298$ K 22) $27^\circ\text{C}$ 23) $263$ K
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pre-lab assignment answer these questions before you come to lab. show …
1. Concentration of CV: $\boldsymbol{4.50 \times 10^{-5}\ \text{M}}$; Concentration of $\text{OH}^-$: $\boldsymbol{0.0625\ \text{M}}$ 2. (a) Zero order: $\boldsymbol{-0.003008}$; …
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1. an atom that has gained or lost electrons is called an ion. a) true …
1. a) True 2. a. Synthesis 3. D)AB + CD → AC + BD 4. a) True 5. B)gets smaller. 6. a) True 7. B)Protein 8. D)Carbon dioxide 9. b) False 10. a) True 11. b) False 12. C) Glucose 13.…
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(celsius / kelvin / fahrenheit) conversions use: $k = ^\\circ c + 273$ …
21) $298\ \text{K}$ 22) $27^\circ\text{C}$ 23) $263\ \text{K}$
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worksheetsnaming and formula writingtotal questions: 21worksheet time: …
1. d) $\text{Ca}_3(\text{PO}_4)_2$ 2. a) $\text{Ba(OH)}_2$ 3. d) $\text{MgCO}_3$ 4. a) $\text{CuCl}_2$ 5. b) $\text{KOH}$ 6. b) $\text{ZnSO}_4$
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10. which of the following rows identifies the compound name and iupac …
1. The correct row: hydrogen chlorite, aqueous chlorous acid (the first row option)
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6. repeat procedure 3 to make a model of one molecule of carbon dioxide…
Carbon (C), Hydrogen (H), Oxygen (O), Nitrogen (N)
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read the dictionary entry. analyze (a-nuh-liyz) gk. ana-, up, throughou…
[Gk. ana-, up, throughout + lysis, a loosening]
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2. determine the formula for the following chemicals. /6 (12÷2) formula…
| Formula | Name | Ionic, molecular, acid, base or hydrate | |-----------------------|-------------------------------|-----------------------------------------| | $\text{CCl}_4$ |…
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21.1s 2s 2pwhat is incorrect about this orbital diagram?a) both arrows …
c) There should be 1 electron (arrow) in the first 2p box and one in the 2nd 2p box. --- ### Question 22
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chem 1110 lab - pa (ver b)quiz 32/11/2026name isabel mansell1. how many…
1. $6.022 \times 10^{23}$ 2. iron, zinc 3. Hydrochloric acid 4. Silver chloride 5. 0.1311 moles
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14. which element has a 3p sublevel that contains 3 electrons? a) phosp…
14. a) Phosphorus 15. a) Calcium 16. a) Scandium 17. a) Iodine 18. a) Argon 19. a) Lead 20. c) The principal quantum number of the outermost electrons
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which help you ensure that temperature readings are accurate? check all…
- shaking the thermometer before use - making sure that the liquid inside the thermometer is at eye level when taking the temperature - making sure that the bulb of the thermomete…
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14. which element has a 3p sublevel that contains 3 electrons? a) phosp…
14. a) Phosphorus 15. a) Calcium 16. a) Scandium 17. a) Iodine 18. a) Argon 19. a) Lead 20. c) The principal quantum number of the outermost electrons
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which help you ensure that temperature readings are accurate? check all…
- shaking the thermometer before use - making sure that the liquid inside the thermometer is at eye level when taking the temperature - making sure that the bulb of the thermomete…
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determine the order of cocoa preparatio which would allow you to add mo…
Heat up the water first because it increases solubility of the powdered mix.
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7. what is the abbreviated ground state electron configuration for iron…
a) [Ar] $3d^6 4s^2$ --- ### Question 8
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waveground worksheets name electron configuration quiz class total ques…
1. b) $1s^22s^22p^63s^1$ 2. d) $[Ar]4s^23d^7$ 3. a) Silver (Ag) 4. a) 4d cannot exist before 4p. 5. b) $[Rn]7s^2$ 6. d) $1s^22s^22p^4$
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what is missing from the solubility graph shown on the right?
The graph is missing: 1. A label for the y-axis (indicating the solubility unit, e.g., g solute/100 g H₂O) 2. Identifiers/legend for the two lines (to show which substances' solub…
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which observation indicates that the kinetic-molecular theory has limit…
its limited use for that gas. The other options align with the theory's postulates.
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which of these is an example of a physical change? ○ a banana ripening …
liquid water turning into vapor
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which process most likely takes place when the kinetic energy of molecu…
, freezing, and solidification all involve a decrease in molecular kinetic energy, where intermolecular forces become stronger to form a more ordered state (liquid from gas, solid…
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which device involves the use of plasma in technology? arc welder diese…
, car radios use electromagnetic signals, and battery flashlights use chemical energy for light, none of which involve plasma technology.
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bromine gas in a container is heated over a flame. what happens to the …
It increases quickly.
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which is the best example of immiscible liquids? ○ two polar liquids th…
D. a polar liquid and a nonpolar liquid that do not dissolve into one another
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a student is using a copper strip and a strong chlorine solution in her…
reactivity of the copper strip
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a perfume bottle is dropped in the corner of a room and it shattered. t…
A. Particles are moving from regions of high concentration to low concentration.
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which process is a chemical change?○ burning a match○ boiling water○ me…
melting ice, and breaking glass are physical changes, as they only alter the state or shape of the substance without forming new chemical identities.
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which statement describes an intensive property of matter? it is the sa…
formation method does not define intensive properties, intensive properties vary between different substances, and properties dependent on amount are extensive, not intensive.