Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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name:period:date:chemistry testbalancing & types of chemical reaction**…
1. SR (Single Replacement) 2. D (Decomposition) 3. C (Combustion) 4. S (Synthesis) 5. DR (Double Replacement) 6. D (Decomposition) 7. C (Combustion) 8. SR (Single Replacement) 9. …
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directions: create a bohr model of an atom by dragging each subatomic p…
- Nucleus (inner blue circle): 13 protons, 14 neutrons - Innermost orbit: 2 electrons - Middle orbit: 8 electrons - Outermost orbit: 3 electrons
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what does the temperature of a substance directly measure? the chemical…
The average kinetic energy of its particles
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6. how many hydrogen atoms are present in one formula unit of ammonium …
6. b. 8 7. a. 1:1. 8. d. 54.94 g/mol. 9. b. 41.99 g/mol. 10. d. 342.17 g/mol.
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1. the atomic number of neon is 10. what is the average atomic mass of …
1. c. 20.180 amu 2. a. 27.94 amu 3. c. 10.812 amu 4. d. hydrogen has more than 1 isotope. 5. c. 6 mol H
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name:the road not takenby robert frosttwo roads diverged in a yellow wo…
1. ABAAB 2. "In leaves no step had trodden black" 3. First-person point of view 4. "Because it was grassy and wanted wear" 5. "Because it was grassy and wanted wear" 6. Reflective…
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name:period:the road not takenby robert frosttwo roads diverged in a ye…
1. $A,B,A,B,B$ 2. "In leaves no step had trodden black." 3. First-person (I/me/my perspective) 4. "Because it was grassy and wanted wear," 5. "Because it was grassy and wanted wea…
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1. when the molecules of gases are heated, the average kinetic energy o…
1. True 2. True 3. True
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what does the creature think causes felix, agatha, and delacey to be un…
1. c. The hardship of poverty. 2. b. Lucretius
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why are physical properties such as hardness or cleavage useful to geol…
D. Physical properties are unique to each mineral and are determined by the mineral's chemical composition and atomic structure
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level: 3 challenge 5 of 5 score: 5 start over $4\\ nh_3 + 6\\ no \ ight…
- $\text{N}_2$: 5 - $\text{H}_2\text{O}$: 6 - Leftover $\text{NH}_3$: 0 - Leftover $\text{NO}$: 0 The product box should contain 5 $\text{N}_2$ (blue-blue molecules) and 6 $\text{…
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an element with mass 730 grams decays by 27.6% per minute. how much of …
13.9 grams
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3. this is a diagram of ammonia. this molecule has a central nitrogen a…
D) trigonal pyramidal
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question 10 (5 points)listenwhich of the following statements is accura…
D) The wavelength of both transverse and longitudinal waves is measured parallel to the direction of the travel of the wave.
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name: kumardatesticky surfacesas you have learned in your friction expl…
1. **Graph Title**: Coefficient of Friction for Different Material Combinations 2. **X-axis**: Labeled "Material Combination", with categories: Ice-Wood, Ice-Steel, Leather-Wood, …
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what is soil?soil is more than just dirt! its a mix of minerals, organi…
1. Minerals, organic matter (dead plants/animals), air, water, and living organisms 2. Topsoil (A Horizon) because it is a dark, nutrient-rich layer with lots of organic matter, m…
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percent yield for the production of chalk labbackground:calcium carbona…
Percent yield of chalk (calcium carbonate): $\approx 76.0\%$ Actual mass of chalk: $1.80\ \text{g}$ Theoretical yield of chalk: $2.37\ \text{g}$ ### Filled Observations (expected)…
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please type in the appropriate word in the blank to complete the paragr…
A. The element **symbols** which are represented by a single uppercase letter, or represented by an uppercase letter followed by a lowercase letter. This tells you the types of el…
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pre-lab: what is the formula that is used to calculate the amount of he…
$\approx 4.78$ Food Calories
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pre-lab: what is the formula that is used to calculate the amount of he…
1. The correct formula for heat absorbed/released by water during temperature change is $q = mc\Delta T$ (the provided $q=mHf$ is for phase change, not temperature change) 2. $\ap…
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warm up question: how many atoms of each element are in the reactant (l…
### Reactants (left side): - Phosphorus (P): 4 atoms - Oxygen (O): 16 atoms - Hydrogen (H): 12 atoms ### Products (right side): - Phosphorus (P): 4 atoms - Oxygen (O): 16 atoms - …
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a corn syrup sample has a density of 1.43 grams per milliliter at 25°c.…
Floats in the corn syrup sample: foam lid, six-sided die, wooden bead Sinks in the corn syrup sample: gold ring
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journii birds practice d.1 calculate density, mass, and volume get 4 co…
420 grams
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use the naming conventions and table of polyatomic ions to complete the…
1. Acid name: chromic acid; Chemical formula: $\ce{H2CrO4}$ 2. Acid name: boric acid; Chemical formula: $\ce{H3BO3}$ 3. Acid name: ascorbic acid; Chemical formula: $\ce{HC6H7O6}$ …
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1) a gold necklace has a density of 18 grams per cubic centimeter and a…
27 grams
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use the naming conventions to complete the following formula-name pairs…
1. Acid name: hydrotelluric acid; Chemical formula: $\text{H}_2\text{Te}$ 2. Acid name: hydrofluoric acid; Chemical formula: HF 3. Acid name: hydroiodic acid; Chemical formula: $\…
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directions: how many grams are in the following elements and compounds?…
1. $96.21\ \text{g}$ 2. $32.68\ \text{g}$ 3. $498.48\ \text{g}$ 4. $174.77\ \text{g}$ 5. $34.01\ \text{g}$ 6. $8.29\ \text{g}$ 7. $87.12\ \text{g}$ 8. $89.12\ \text{g}$ 9. $143.70…
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unit 6 quiz: stoichiometry using the balanced equation and reference in…
1. $1.36 \times 10^{24}$ molecules of $\text{CO}_2$ 2. $23.2$ liters of $\text{H}_2\text{O}$
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the picture on the right the picture of the left which picture shows ma…
The picture on the right
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4. how many moles of carbon dioxide ($co_2$) will be produced from 3.01…
4. $4.529$ moles of $\ce{CO2}$ (rounded to 4 significant figures) 5. The missing conversion factor is $\frac{1\ \text{mol}\ \ce{Fe}}{6.022 \times 10^{23}\ \text{atoms}\ \ce{Fe}}$
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snc 1w snc 1w safety in the science lab use the graphic provided by the…
1. - Unsafe Activity 1: Jim is drinking from an unlabeled container. This is unsafe because the container could hold toxic/irritating lab chemicals, leading to poisoning or injury…
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molarity practice problems 1) how many grams of potassium carbonate are…
1. $69.1\ \text{grams}$ 2. $0.29\ \text{liters}$ 3. $3.51\ \text{M}$ 4. $198.15\ \text{grams}$ 5. $0.85\ \text{M}$ 6. $816.5\ \text{grams}$ (rounded)
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question 1 respond to the following based on your reading. what is the …
| Feature | Longitudinal Waves | Transverse Waves | |---------|---------------------|-------------------| | Wave-Particle Direction | Parallel | Perpendicular | | Molecular Cycle …
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c. by studying the interactions of living organisms with their environm…
d. They are the building blocks that combine to form all substances
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how does chemistry contribute to environmental protection? a. chemistry…
a. Chemistry helps develop cleaner energies, reduce pollution, and conserve natural resources.
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how does chemistry contribute to environmental protection? a. by design…
c. By developing cleaner energies and reducing pollution
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which of the following is an example of matter? a. heat b. light c. sou…
d. Water
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what do chemists study to understand the interactions and transformatio…
c. Atoms and molecules
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an element with mass 590 grams decays by 19.5% per minute. how much of …
$20.7$ grams
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ben is giving a speech in his chemistry class in which he describes a r…
technical language
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$2h_2 + o_2 \ ightarrow 2h_2o$ given 50.0 grams of $h_2$, how many mole…
24.8 mol $\text{H}_2\text{O}$ (For the box matching: 1. Leftmost box: $\boldsymbol{50.0\ \text{g}\ \text{H}_2}$ 2. Middle left box: $\boldsymbol{2.016}$ 3. Middle right box upper:…
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what is the mole ratio of $\text{ca(oh)}_2$ to $\text{caso}_4$ in the f…
$1:1$
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the actual yield is 49.25 grams. the theoretical yield is 53.67 grams. …
91.76%
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how many grams of h₂ will be required if 6.23 grams of nh₃ is produced …
Filled t-chart values (left to right, top then bottom): Top row: 1, 3, 2.016 Bottom row: 17.031, 2, 1 Final calculated mass of $\text{H}_2$: $1.11\ \text{g}$ (The completed dimens…
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the change in height of a solution in a beaker during a chemical reacti…
$-0.0382$ millimeters
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mole ratio mole conversion given amount moles of unknown moles of known…
1. Top left blank: given amount 2. Top middle blank: moles of Known 3. Bottom middle blank: moles of Unknown 4. Top right blank: 1 mole of Unknown 5. Bottom right blank: Molar Mas…
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which of the following descriptions is accurate? a. a ballad consists o…
A. A ballad consists of three or four stressed syllables per line and a story of some kind.
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read the following excerpt from a poem: and thou art dead, as young and…
C. abba
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do now name: madison c date: feb 9 class: chem p.4 balance & identify t…
1. Balanced equation: $\boldsymbol{\text{Ca} + \text{Cl}_2 ightarrow \text{CaCl}_2}$ Reaction type: $\boldsymbol{\text{Combination}}$ 2. Balanced equation: $\boldsymbol{2\text{KCl…
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mole conversion mole ratio molar mass (g) moles of unknown moles of kno…
| Position | Filled Component | |-------------------|--------------------------------| | Top Left | given amount | | Bottom Middle | Molar Mass (g) | | Top Middle | moles of Known…
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which statement accurately describes what happens when water turns to i…
The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.
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which statement accurately describes what happens when water turns to s…
The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.
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review: unit 7 - stoichiometryvocabularythe ____________ represent the …
1. The **coefficients** represent the number of **moles** needed to complete a chemical reaction. 2. We need a balanced chemical equation to complete stoichiometric calculations i…
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21. the temporal area affects: * 3 points a. bang placement only b. hai…
21. C. Balance and blending 22. C. Occipital 23. C. Cutting accuracy 24. B. Top and sides of the head
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13. the occipital area is: *3 pointsa. the front of the headb. the back…
13. B. The back of the head 14. B. At the hairline near the neck 15. C. It affects the perimeter and finish 16. B. Guide sectioning and cutting
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re-order each list in the table below, if necessary, so that the atoms …
1. Be, B, O 2. I⁻, I, Br 3. I⁻, Xe, I
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the plateaus of the graph represent changes in the substances (check al…
☑️ state of matter ☑️ potential energy
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name:per:35a: classifying changes skills check1. a student lights a can…
1. C. Both physical and chemical changes have occurred. 2. The solid wax melting into liquid wax is a physical change (only state of matter changes, no new substance formed). The …
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re-order each list in the table below, if necessary, so that the atoms …
| atoms or ions | atoms or ions in order of decreasing size | |---------------|-------------------------------------------| | $\text{Be}^+, \text{Be}, \text{Li}$ | $\text{Li}, \te…
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the amount of heat needed to boil a liquid at its boiling point is call…
Heat of Vaporization
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a neutral atom has the following electron configuration: $\\ce{ne 3s^1}…
1. Chemical symbol: Na 2. Total electrons: 11 3. 3s electrons: 1
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an atomic cation with a charge of +1 has the following electron configu…
1. $\text{Na}^+$ 2. 10 3. 6
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an atomic anion with a charge of $-1$ has the following electron config…
1. $\text{I}^-$ 2. 54 3. 10
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what type of bond or attraction is broken when heat is added to the liq…
the hydrogen bond between different water molecules
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across 6. the ability of a substance to burn or ignite. 8. the ability …
6. FLAMMABILITY 8. MAGNETISM 9. COMBUSTION 11. CONDUCTIVITY 14. MELTING POINT 16. LUSTER 18. COLOR 19. DUCTILITY 23. CHEMICAL REACTIVITY 24. ODOR 25. PH 26. OXIDATION 27. PHYSICAL…
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across 4. the ability of a substance to burn or ignite 8. the ability o…
## Across: 4. **LUSTER** (ability to bend light) 8. **MAGNETISM** (attract/repel other materials) 9. **COMBUSTION** (rapid reaction with oxygen for heat/light) 15. **CONDUCTIVITY*…
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why is a protective apron or lab coat important to use when working wit…
Acids break down fabrics and can cause burns if the acids are strong.
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which substance is used to remove rust from metal? ○ lye (naoh) ○ hydro…
hydrochloric acid (HCl)
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while researching life during colonial times, carson learns that people…
making soap
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when an old building is to be torn down, mr. phams company removes the …
hydrochloric acid
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mrs. rushing fills a balloon with hydrogen gas to demonstrate its abili…
Mg and HCl
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who would most likely be required to work with sodium hydroxide? ○ a pl…
a plumber
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which substance is an acid?○ lioh○ mg(oh)₂○ ch₃cooh○ nacl
CH₃COOH
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a compound that releases hydroxide ions in solution would most likely h…
A. It would react with lipids to form soap.
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which substance is used in fertilizers? slaked lime ($\\text{ca(oh}_2\\…
nitric acid ($\text{HNO}_3$)
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choosing the right substance ren runs a hamburger stand and needs to cl…
Ren should look for a cleaning product with the following key properties: 1. A heavy-duty, grease-specific formula with active degreasers (such as surfactants or mild solvents) th…
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which characteristic describes bases?○ taste sour○ feel slippery○ react…
B. feel slippery
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which of the following are properties of both acids and bases? check al…
- conduct electricity - cause burns
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identify some acids that are found in everyday materials. □ lemon juice…
- lemon juice - vinegar
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identifying bases which substances are bases? check all that apply. nao…
- NaOH - KOH - $Ca(OH)_2$
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which substances are acids? check all that apply. agoh hf niooh nh₄oh h…
B. HF E. HMnO₄
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$\\frac{2,860\\text{ kilograms}}{0.915\\text{ cubic meters}} \\cdot \\f…
$\boldsymbol{3}$ (Option 3)
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match each person or term to the correct description. john b. goodenoug…
- John B. Goodenough: Scientist who later won a Nobel in Chemistry - Lithium-ion batteries: Rechargeable power sources for mobile devices - Esther Duflo: Economist using experimen…
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which bonds are found inside a water molecule, between hydrogen and oxy…
covalent bonds
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which statement best explains why water is known as the universal solve…
Water has the ability to dissolve more substances than any other liquid.
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which statement explains why hydrogen bonds are able to form between wa…
A. Water molecules are polar.
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8. what sector of the u.s. economy consumes most of the nations petrole…
8. Transportation 9. Electrons
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2. electrical energy can be produced from mechanical energy chemical en…
2. D. All of the above 3. C. Heating and cooling rooms
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at what temperature will water heat to the point of vaporization? (chec…
B. 100 Celsius D. 373 Kelvin
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9) 78g pb(oh)₄10) 15.1g hno₃calculate the mass for the following-11) 2.…
11) $126.234\ \text{g}$ 12) $374.5525\ \text{g}$ 13) $308.67\ \text{g}$ 14) $1183.4976\ \text{g}$ 15) $47.2635\ \text{g}$
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multiple-choice question a change in enthalpy is a change in heat chang…
change in heat
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multiple-choice question why is it hard to see a gas? molecules are clo…
Moleuces are further apart (note: this contains a typo, it should be "Molecules are further apart")
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multiple-choice question what is going to happen to the water molecules…
they will begin to move past each other
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multiple-choice question a measure of the average kinetic energy of the…
temperature
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true or false: oxgen has slightly negative charge compared to hydrogen.…
True
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multiple-choice question where do the electrons in the water molecule s…
closer to the oxygen atom
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9 le graphique ci-contre représente la décomposition du dioxyde dazote.…
a) Faux. Le réactif est $2\ NO_{2(g)}$. b) Vrai. c) Vrai. d) Faux. $\Delta H$ est négative (-66,4 kJ). e) Faux. Elle est de +33,2 kJ/mol de $NO_2$.
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which of the following changes to earths atmosphere would increase the …
- increasing the concentration of $\text{CO}_2$ - increasing the amount of water vapor
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based on the information above, which of the following statements are t…
- Earth's average temperature is warmer than it would be if Earth's atmosphere did not contain any greenhouse gases. - After infrared radiation is trapped in the atmosphere, the i…
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1. draw the structure of the alcohol, carboxylic acid and ester needed …
C - C - C - C - C - C - C - O - H | | | | | | | | H H H H H H H H ``` (1-Octanol: CH₃(CH₂)₇OH, all bonds drawn) ``` O || C - O - H | CH₃ ``` (Acetic acid: CH₃COOH, all bonds drawn…