Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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drag each tile to the correct location. classify the chemical equations…
Balanced: \( 2CO + 2NO ightarrow 2CO_2 + N_2 \), \( H_2CO_3 ightarrow H_2O + CO_2 \) Not Balanced: \( 6CO_2 + 6H_2O ightarrow C_6H_{12}O_6 + O_2 \), \( 2Cu + O_2 ightarrow CuO \)
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select the correct answer from each drop-down menu. the chemical formul…
The coefficient is 4, the subscript of carbon is 10, and the subscript of hydrogen is 8.
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drag the tiles to the correct boxes to complete the pairs. match the ch…
"The reaction has at least two reactants and one product" - synthesis "The reaction has one reactant and at least two products" - decomposition "Oxygen is one of the reactants, an…
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select the correct answer from each drop-down menu. hydrogen can be cre…
solar energy
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select the correct answer from each drop-down menu. hydrogen can be cre…
decomposing
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select the correct answer. nitrogen (n) and hydrogen (h) react with eac…
B. 1 to 3
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select the correct answer. in a given chemical reaction, the energy of …
A. Energy is absorbed in the reaction.
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select all the correct answers. which of these are examples of mixing a…
A. removing seed casings from grains, B. a soda bottle bubbling when it is opened, D. removing salt from seawater
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post test: chemical reactions select the correct answer. which law repr…
C. law of conservation of mass
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drag each label to the correct location. classify each material as an a…
- Alloy: bronze, brass, steel - Ceramic: brick, tile, glass
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select the correct answer. katrina inserts a key into her car’s ignitio…
B. activation energy
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discussion topic chemical energy sources are often portable and provide…
Natural Science - Environmental Sciences
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an electrical drill has 100 j of chemical energy. of the 100 j, 45 j ar…
35
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in aqueous solution the ag⁺ ion forms a complex with two cyanide anions…
For the formation constant expression: $K_f = \frac{[\ce{[Ag(CN)2]-}]}{[\ce{Ag+}][\ce{CN-}]^2}$ For the first step: $\ce{Ag+(aq) + CN-(aq) <=> [Ag(CN)](aq)}$
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a chemist working on a flu vaccine needs to mix a 20% sodium-iodine sol…
The function is \( S(x) = -0.1x + 18 \) and \( S(40) = 14 \). The interpretation of \( S(40) = 14 \) is that when 40 milliliters of the 20% sodium - iodine solution is used (and t…
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6. draw a force diagram for a skydiver who has just left the plane and …
\(\sum F_x = 0\), \(\sum F_y=F_{air}-F_g\)
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during a chemistry experiment, jaclyn records how the temperature chang…
For the first blank (after "The"): The temperature (but if forced to choose from the given options, the intended answer is likely a correction, but based on the options, the secon…
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during a chemistry experiment, jaclyn records how the temperature chang…
The independent variable is time, and the dependent variable is temperature, temperature depends on time.
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5. draw a force diagram for the bucket of water that is being raised fr…
\(\sum F_{x}=0\) \(\sum F_{y}=T - mg = 0\)
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question 12 • 0f24 step 1 of 3 the half - life of gold - 194 is approxi…
\(a\approx0.645497\)
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an artifact originally had 16 grams of carbon-14 present. the decay mod…
7
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an artifact originally had 16 grams of carbon-14 present. the decay mod…
7
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question 12 of 24 step 3 of 3 the half - life of gold - 194 is approxim…
1.591
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new and interesting research conducted by suleiman a. al - sweedan and …
B. paucity of
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passage poems great expectations, a novel written by charles dickens (1…
by comparing the passage of time to waves breaking on the shore
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group d: atoms extension 1. go to phet: build an atom. (https://phet.co…
### 2a. An ion is: An atom (or a group of atoms) that has a net electric charge due to the loss or gain of one or more electrons. ### 3. What makes an atom stable or unstable? An …
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3. identify the solute(s) and solvent in each of the following solution…
(a) Solute: salt (\(NaCl\)); Solvent: water (\(H_2O\)) (b) Solute: carbon dioxide (\(CO_2\)); Solvent: water (\(H_2O\)) (c) Solute: hydrogen peroxide (\(H_2O_2\)); Solvent: water …
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2. choose 2 of the atoms from the table above, and show how they would …
Example using Na and Cl: Na (blue) • Cl (red) ••••••• (after bonding: Na⁺ [Cl⁻ with 8 dots, 1 from Na]) (Visual: Na in blue with 1 dot, Cl in red with 7 dots initially, then Cl ha…
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dahlia is trying to make partner at one of the city’s most prestigious …
D. norms
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read shakespeare’s \sonnet 19.\devouring time, blunt thou the lion’s pa…
- the \( abab, cdcd, efef, gg \) rhyme scheme - the widespread use of iambic pentameter - the use of three quatrains followed by a couplet (or including the "the fact that the fin…
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2. as a group, discuss some examples of each: elements - atoms - compou…
- Elements: Hydrogen ($\ce{H}$), Oxygen ($\ce{O}$), Carbon ($\ce{C}$), Gold ($\ce{Au}$), Iron ($\ce{Fe}$) - Atoms: A single $\ce{H}$ atom, a single $\ce{O}$ atom, a single $\ce{C}…
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2. as a group, discuss some examples of each: elements - atoms - compou…
a. Sodium chloride: $NaCl$ b. Magnesium chloride: $MgCl_2$ c. Water: $H_2O$ d. Carbon dioxide: $CO_2$
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an artifact originally had 16 grams of carbon-14 present. the decay mod…
6
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substance | equation for dissociation of compound | δh value (negative …
### 1. Best Salt for Hot Pack Sodium hydroxide is the best choice because its dissociation in water is exothermic (releases heat), which warms the hot pack. Potassium chloride’s d…
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group b: terminology 1. as a group, discuss how to fill out the followi…
### 1. Filling the diagram: - Top right (from Periodic Table): Elements - Below Elements: Atoms - From Atoms (bonding): Molecules - From Molecules (bonding different elements) or …
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based on her experience, nadine tends to view the supporters of a parti…
B. attitude
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virtual lab: hot and cold packs go to https://tinyurl.com/virtualhotcol…
The subfield is Chemistry (under Natural Science). To complete the lab: 1. Visit the link. 2. For Sodium Chloride: Dissociation equation $\ce{NaCl(s) -> Na^{+}(aq) + Cl^{-}(aq)}$,…
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in the last step of lewins model of change, ______, role modeling is pr…
A. refreezing ### Question 2
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elements & compounds unit review group a: periodic table & bonding as a…
Elements in each column (group) have similar chemical properties because they have the same number of valence electrons. The number of electron shells increases down the column, b…
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a chemist has an empty cylinder with a height of 30 cm and a cone - sha…
10 cm
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9 mark for review a chemist combines water and acetic acid to make a mi…
46
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a firefly uses specialized muscles to draw oxygen into its lower abdome…
B. By contrast.
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while researching a topic, a student has taken the following notes: - m…
B. Before 2008, Kentaro Terada wondered if the Moon was receiving some of its oxygen from Earth.
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in 1974 mexican chemist mario molina and us chemist f. sherwood rowland…
B. Specifically
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26 multiple choice 1 point ozone has a formula of o o₂ o₃ o₄
\( O_3 \) (the option with \( O_3 \))
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the manufacturing of ______ or cloth products, is an important part of …
C. textiles
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name date 3.1 assessment match each description on the left with the ty…
1. E. thermal energy 2. B. potential energy 3. D. kinetic energy 4. A. solar energy 5. F. chemical energy 6. C. nuclear energy
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a student dissolves a spoonful of sugar (a covalent compound) in a cup …
There are billions of sugar molecules in the water.
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multiple-choice question a student dissolves a spoonful of nacl in a cu…
A. There are billions of NaCl particles in the water.
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what is coulombs law? every object exerts gravitational force on every …
Coulomb's Law states that the electrostatic force (\( F_{e} \)) between two charged particles is given by \( F_{e}=k\frac{q_{1}q_{2}}{r^{2}} \), where \( q_1, q_2 \) are the charg…
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read this excerpt from \sea fever\ by john masefield. and the wheel’s k…
C. The fixed meter and predictable rhyme scheme create an upbeat rhythm.
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what is the chemical formula for this molecule? complete the formula be…
C₁H₃F₁O₁
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what is the chemical formula for this molecule? complete the formula be…
\( \text{CHCl}_3 \)
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what is the chemical formula for this molecule? complete the formula be…
$C_1H_3F_1$ (or simply $CH_3F$)
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what is the chemical formula for this molecule? complete the formula be…
\(C_3H_6\)
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what is the chemical formula for this molecule? complete the formula be…
\(C_1H_3Cl_1\) (or simply \(CH_3Cl\))
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what is the chemical formula for this molecule? complete the formula be…
$C_2H_6$
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what is the chemical formula for this molecule? complete the formula be…
\(CH_3FO\)
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what is the chemical formula for this molecule? complete the formula be…
\(CH_3Br\)
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what is the chemical formula for this molecule? complete the formula be…
N₂H₄
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what is the chemical formula for this molecule? complete the formula be…
C₁H₂Cl₂
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what is the chemical formula for this molecule? complete the formula be…
\(C_3H_8\)
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what is the chemical formula for this molecule? complete the formula be…
\(CHCl_3\)
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what is the chemical formula for this molecule? complete the formula be…
C₃H₆
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which of the following statements about tobacco products is true? a. to…
A. Tobacco products contain over 4,000 different chemicals.
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what is the chemical formula for this molecule? complete the formula be…
\(CH_3F\)
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what is the chemical formula for this molecule? complete the formula be…
C₁H₃F₁O₁ (or simply CH₃FO)
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what is the chemical formula for this molecule? complete the formula be…
\(PH_3\)
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carbon monoxide, a substance found in tobacco smoke, is also found in _…
B. vehicle exhaust
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what is the chemical formula for this molecule? complete the formula be…
H₂S
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what is the chemical formula for this molecule? complete the formula be…
$CI_4$
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what is the chemical formula for this molecule? complete the formula be…
$NH_3$
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what is the chemical formula for this molecule? complete the formula be…
\(H_2O_2\)
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what is the chemical formula for this molecule? complete the formula be…
\(C_1Cl_4\) (or simply \(CCl_4\) as the 1 is often omitted for single - atom elements in chemical formulas)
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glaciers erode land through which two processes? ○ chemical weathering …
C. plucking and abrasion (assuming the options are labeled A - D with this as option C; if original labels differ, adjust, but based on content, the correct pair is plucking and a…
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question 7 of 20 which feature is commonly found in ballads? a. three s…
A. Three stanzas with an abab rhyme scheme
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multiple select question select all that apply which of the following a…
A. humanistic, B. cognitive, C. behavioral, D. sociocultural
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balancing chemical equations balance the equations below: 1) ____ n₂ + …
1. \(1N_2+3H_2 = 2NH_3\) 2. \(2KClO_3=2KCl + 3O_2\) 3. \(2NaCl+F_2 = 2NaF+Cl_2\) 4. \(2H_2+O_2 = 2H_2O\) 5. \(Pb(OH)_2+2HCl = 2H_2O+PbCl_2\) 6. \(2AlBr_3+3K_2SO_4 = 6KBr+Al_2(SO_4…
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the ph scale is used to tell if a substance is an acid or base. substan…
base
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a nurse is caring for a client who was prescribed an antidepressant bas…
A. Pharmacologic action
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when reviewing a list of medications in a medication handbook, a nurse …
It begins with a lowercase letter.
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i can calculate the reaction quotient, q and determine which direction …
The system is at equilibrium.
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ions are found in the compounds we use every day. this model shows how …
Sodium \(\boldsymbol{\text{loses}}\) an electron, and chlorine \(\boldsymbol{\text{gains}}\) an electron. So the sodium atom becomes a \(\boldsymbol{\text{positively}}\) charged i…
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electrical bonding investigation plan quick check which procedure would…
A. Heat each substance in liquid form to its boiling point. Measure the temperature of each substance
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electrical bonding investigation plan quick check which best describes …
the temperature at which additional heat energy causes the substance to change from a liquid to a gas (the fourth option)
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electrical bonding investigation plan quick check water melts at 0°c. a…
The electrostatic forces between molecules in the unknown liquid are stronger than the electrostatic forces between water molecules.
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a chemistry student weighs out 0.160 kg of an unknown solid compound x …
The solubility of \( X \) in water at \( 22^\circ \text{C} \) is \( \boldsymbol{16.0 \, \text{g/100 g water}} \) (or \( \boldsymbol{160 \, \text{g/kg}} \), or \( \boldsymbol{160 \…
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electrical bonding investigation plan quick check use the table to answ…
B. glycerin (assuming the options are labeled as: A. propane, B. glycerin, C. acetone, D. turpentine; if the original options have different labels, adjust accordingly to match th…
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a particle with a positive or negative net charge is called an ion. sel…
The models of ions are the Top - Left, Bottom - Left, and Bottom - Right models (assuming the checkmarks in the image correspond to these, as the Top - Right has equal protons and…
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electrical bonding investigation plan quick check which list includes o…
D. boiling point, strength of electrical forces, vapor pressure (assuming the options are labeled A, B, C, D in order. If the original options are in the order as given, the last …
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Question was provided via image upload.
3
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fill in the blank 4 points 1 li + 3 alcl₃ ⟶ 1 licl + 3 al
The last blank should be filled with \(Al\) (aluminum) with a coefficient of 1. So the completed equation is \(3Li + AlCl_3 = 3LiCl+Al\) (but if we follow the given initial number…
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how many electrons are depicted in the electron dot diagram of a neutra…
4
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question 1 points 2 a 2 kg object is raised 5 meters and then released.…
Potential energy transforms into kinetic energy (the option with this text, e.g., the third option in the list: "Potential energy transforms into kinetic energy")
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which of these chemical formulas - kcl, xe, co₂, h₂ - represents both a…
H₂
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baking cookies are what type of change? a thermal change a chemical cha…
B. A chemical change
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question an element with mass 590 grams decays by 19.5% per minute. how…
\(28.1\) grams
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which of these is not a physical change? burning a candle getting cloth…
burning a candle
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in this investment, the brokers promise incredibly good and/or incredib…
D. ponzi scheme
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how many carbon atoms are in a carbon monoxide molecule? hint: in the m…
1 (corresponding to the option with "1")