Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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complete the text with the best transition. some people argue that bott…
In particular
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vocab practice: drag the term into the correct box below. vocabulary te…
Thermal Energy - Energy related to the vibration and movement of particles (heat). Nuclear Energy - Energy stored in the nucleus of an atom. Electrical Energy - Energy from moving…
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9. give the symbol and number of neutrons in one atom of: (to get “mass…
Barium: Symbol \(^{137}_{56}Ba\), 81 neutrons Carbon: Symbol \(^{12}_{6}C\), 6 neutrons Fluorine: Symbol \(^{19}_{9}F\), 10 neutrons Europium: Symbol \(^{152}_{63}Eu\), 89 neutron…
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8. give the symbol and number of electrons in a neutral atom of: uraniu…
Yes ### For 11b: Different isotopes of the same element can have different numbers of neutrons. So just knowing the number of neutrons is not enough to determine the element.
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10. name the element which has the following numbers of particles: a. 2…
a. Iron (Fe) b. Iodine (I) c. Helium (He) d. Calcium (Ca) e. Lead (Pb) f. Hydrogen (H)
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9. give the symbol and number of neutrons in one atom of: (to get “mass…
Barium: Symbol $^{137}_{56}Ba$, 81 neutrons Carbon: Symbol $^{12}_{6}C$, 6 neutrons Fluorine: Symbol $^{19}_{9}F$, 10 neutrons Europium: Symbol $^{152}_{63}Eu$, 89 neutrons Bismut…
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7. give the symbol and number of protons in one atom of: lithium ______…
Lithium: Li, 3 Iron: Fe, 26 Oxygen: O, 8 Krypton: Kr, 36 Bromine: Br, 35 Copper: Cu, 29 Mercury: Hg, 80 Helium: He, 2 Uranium: U, 92 Boron: B, 5 Antimony: Sb, 51 Chlorine: Cl, 17 …
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step #1: find the mass of water. notes: the water can be driven off by …
Formula of the hydrate: $MgCO_3\cdot5H_2O$ Name of the hydrate: magnesium carbonate pentahydrate
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5. the ______________ of an element is the total number of protons and …
5. mass number; nucleus 6. neutrons; atomic number; mass number
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4. the ____________ of an element is the average mass of an element’s n…
atomic mass; relative abundance
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3. the atomic number tells you the number of ____________ in one atom o…
protons; electrons; same
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2. the number of protons in one atom of an element determines the atom’…
Atomic number; Chemical properties
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based on your evidence, identify the type of compound for each substanc…
Claim: Physical properties can be used to identify bond type because different bond types result in different physical properties due to the nature of the bonding forces. Evidence…
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1. the 3 particles of the atom are: a. ____________ b. ____________ c. …
1. a. Protons b. Neutrons c. Electrons a. Positive b. Neutral c. Negative 2. Atomic number; Chemical properties 3. Protons; Electrons; Same 4. Atomic mass; Abundance 5. Mass - num…
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2 electric and magnetic fields produce _. centripetal force atomic stru…
electromagnetic energy
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energy in motion physical science includes the study of energy. energy …
an earthquake
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matter states and molecular density according to this diagram, as matte…
become less compacted.
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which statements describe iambic pentameter as it is used in shakespear…
Each line contains five metrical feet. In a group of two syllables, the second is stressed.
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6.bsu mathematical computation 6 pts use the table below to answer ques…
28) $1.5\ ml$ 29) $6.82\ g/ml$ 30) $1.6\%$
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exercises - électronégativité (liasons ioniques et covalentes) 1. deter…
a) $\Delta$ÉN = 1.4, liaison covalente polaire. b) $\Delta$ÉN = 0.4, liaison covalente non polaire. c) $\Delta$ÉN = 1.8, liaison ionique. d) $\Delta$ÉN = 2.0, liaison ionique. e) …
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when sunlight strikes air particles, the light is scattered in all dire…
B. Diffraction causes the sky to look blue.
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sunlight sunlight looks white but is actually a mixture of all the colo…
Diffraction causes the sky to look blue.
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lucy is learning that atoms are made up of several smaller particles. h…
6. nucleus 7. electron
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2. when building your own atom, youve learned all about the balance of …
It has 6 protons
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read the excerpt from \the environmental ethic\. it is fashionable in s…
A. All species are worth protecting because even the small organisms contribute important functions in the environment
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what extensive property is the difference between a gold bar and a gold…
Mass
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4. gender schemas are most rigid at age 9 - 12. true false
False
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gender development quiz psychology / module 3: development over the lif…
They are permanent ideas of what it means to be masculine or feminine.
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behind the lines name:____ use complete sentences if needed. hour:____ …
19. Some soldiers faced combat - related risks like injury, capture, or death. 20. Coalition forces were afraid Saddam Hussein would use weapons of mass destruction (chemical or b…
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question 8(multiple choice worth 2 points) (05.02 mc) read the first st…
C. AABBA
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question 5 (matching worth 4 points) (05 02 lc) match each poetry term …
Line length - A Rhyme scheme - B Stanza breaks - D White space - C
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question 5 (matching worth 4 points) (05 02 lc) match each poetry term …
Line length - None of the above accurately (but conceptually related to syllable/foot - count); Rhyme scheme - B; Stanza breaks - D; White space - C
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read the sentence from an argumentative essay about chemical waste. the…
The chemical waste produced by factories is dangerous, and factory owners should be held accountable.
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what elements are present in sugars? carbon, hydrogen, oxygen oxygen, h…
carbon, hydrogen, oxygen
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compare a water molecule, h₂o, to a hydrogen peroxide molecule, h₂o₂. w…
Water and hydrogen peroxide are made from the same types of atoms, but combine in different ways.
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which changes involve forming or breaking chemical bonds? o boiling and…
burning and digesting
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what is the smallest part of a compound called? element atom mixture mo…
D. molecule
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which choice is not an example of a molecule? o o₃ o koh o h₂s o mn
Mn
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match the correct symbols with the names of elements. match the words i…
The chemical symbol Co stands for cobalt. The chemical symbol C stands for carbon. The chemical symbol Ca stands for calcium. The chemical symbol Cl stands for chlorine. The chemi…
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the next morning the dog was gone, as in my art i knew it would be; i h…
4. D. He knew that the dog would not be confined 5. D. Unyielding 6. D. He was not surprised that the dog had run away 7. C. place was 8. A. Fate 9. D. To describe a significant e…
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question 3 of 3 _____ are properties of microcurrent. (select all that …
Negative and positive polarity in one probe Current treats only a specific area, does not travel through the body Constant and direct current using a positive and negative pole Ex…
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____ are properties of tesla high - frequency current. (select all that…
Negative and positive polarity in one probe Uses one electrode made of glass or metal Thermal or heat - producing current with a high rate of oscillation Named after a Croatian el…
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question 1 of 3 _____ are properties of galvanic current. (select all t…
Named after an Italian doctor Extremely low level of electricity that mirrors the body's electrical impulses Negative and positive polarity in one probe Constant and direct curren…
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demonstration observe the demonstration and answer the following questi…
If the initial mass of Kool - Aid in Solution C is $m$ grams and the initial volume of Solution C is $V$ mL, the final concentration is $\frac{m}{V + 200}$ g/mL. Without knowing t…
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determine which of the following has the highest electronegativity. wri…
Fluorine
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permutations and combinations review name: 1. how many arrangements of …
453600 ### 2. How many arrangements can be made of word CHEMISTRY if the letters M, I, and S must appear together, in that order?
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barber and beauty services a career in cosmetology as a beautician or b…
In a vocational school
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answer each question about the following atom when it becomes an ion. p…
Potassium; K⁺; +1; loses; 1
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potassium determine the ionic radius. write the chemical symbol and cha…
1. Cation 2. K, +1 3. +1, loses, 1
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determine which of the following has the lowest electronegativity. writ…
Cesium
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determine which of the following has the largest atomic radius. write o…
rubidium
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isotope practice 1. here are three isotopes of an element: $_{6}^{12}c$…
1. - a. Carbon - b. Atomic number - c. Atomic mass - d. Protons: 6, Neutrons: 6 - e. Protons: 6, Neutrons: 7 - f. Protons: 6, Neutrons: 8 2. See above - calculated values for the …
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directions: check to see if the following equations are balanced or not…
1. Dark Blue 2. Light Blue 3. Dark Gray 4. Orange 5. Brown 6. Golden Yellow 7. Purple
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determine which of the following has the highest ionization energy. wri…
Hafnium (Hf)
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post - lab q13 what is the total amount of solids recovered? type your …
71.23%
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a student isolated the following from an unknown mixture: | component |…
$1.567$
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1. here are three isotopes of an element: $_6^{12}c$ $_6^{13}c$ $_6^{14…
| Isotope name | atomic # | mass # | # of protons | # of neutrons | # of electrons | | ---- | ---- | ---- | ---- | ---- | ---- | | Potassium - 37 | 19 | 37 | 19 | 18 | 19 | | Oxyg…
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just for fun, lets calculate how many agno₃ molecules are in those 0.10…
B. $6.02\times 10^{22}\text{ AgNO}_3$ molecules
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for beryllium chloride, 0.076 moles of silver nitrate are used. for mag…
D. 0.100 mol
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look at the reaction schemes in your journal or click the view image bu…
B. There should be twice as many moles of $AgNO_3$ as $XCl_2$
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in order for the gravimetric analysis to be valid, we want all of the c…
B. By ensuring silver ions are in excess
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in chemical reactions, what is the definition of a limiting reagent? a)…
D. The reactant that is completely consumed in the reaction.
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why is it important to use demineralized water? a) because demineralize…
d) Because demineralized water doesn't contain minerals
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what type of bond involves the sharing of electrons between atoms? ioni…
1. B. Covalent bond 2. C. Hydrogen bond
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atomic mass (route) 1. example: the natural distribution of the isotope…
For lutetium, the atomic mass is approximately $175.90\ amu$. For chlorine, the atomic mass is approximately $35.45\ amu$. For potassium, the atomic mass is approximately $39.10\ …
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5. which explanation best illustrates the cause - and - effect relation…
A. The energy from lightning heats up molecules, causing them to react to form new molecules (nitrates)
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what is the main goal of the investigation as described in the document…
There is no information about which document is referred to, so it's impossible to determine the correct answer. If we assume this is a chemistry - related investigation based on …
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the only equation youll ever need n (mol) x m (g) / m (g/mol) done day …
$M=\frac{m}{n}$
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what is the main goal of the investigation as described in the document…
There is no information in the question - body about which document is referred to. Without the content of the document, it's impossible to determine the main goal of the investig…
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what is the main goal of the investigation as described in the document…
No information about the document is provided, so it's impossible to determine the correct answer from the given options.
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how can you improve the accuracy of your results in the ame that compou…
C. By comparing results with known solutions
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where would you find the most particles: in the sahara desert at a dept…
B. There are roughly the same amount of particles on each picture
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what does the unique color emitted by a metallic element when burned in…
3. The energy levels are unique to each metal.
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if 1.00×10^18 singly - charged positive sodium ions flow from the anode…
$0.32\ A$
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atoms and molecules are way too small to be seen, even with a microscop…
b) You count them by mass
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read the excerpt from levitt and dubners freakonomics. if morality repr…
to lend credibility and additional support to their conclusion
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5. a poetic form that traditionally consists of 14 lines, written in a …
A. Sonnet
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use the periodic table to fill in the chart below for neutral atoms. se…
| Element | Chemical Symbol | Number of Protons | Number of Electrons | Number of Neutrons | | ---- | ---- | ---- | ---- | ---- | | Helium | He | 2 | 2 | 2 | | Hydrogen | H | 1 | …
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what are 3 signs that we talked about in virtual lesson that a chemical…
gas formation, pH change, odor
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true or false: in a chemical equation, the # of atoms in the reactants …
True
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chem 100 - introduction to chemistry - fall 2025 q13. which of the foll…
b) Blue light.
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use the periodic table to fill in the chart below for neutral atoms. se…
| Element | Chemical Symbol | Number of Protons | Number of Electrons | Number of Neutrons | | ---- | ---- | ---- | ---- | ---- | | Hydrogen | H | 1 | 1 | 0 |
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6. what is the term for the columns going down the periodic table? what…
6. Groups or families; number of valence electrons (for non - transition metals) 7. For main - group elements, use the group number (old 1 - 8A system) 8. Total electrons (atomic …
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write the symbols for the following elements 1. oxygen 2. hydrogen 3. c…
1. O 2. H 3. Cl 4. Na 5. F 6. C 7. He 8. N 9. Cu 10. S 11. Mg 12. Mn 13. Ne 14. Br 15. P 16. Ag 17. Pb 18. Fe 19. Ca 20. K 21. Copper 22. Potassium 23. Carbon 24. Gold 25. Zinc 26…
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question 15 (1 point) in the reaction: c + o2 → co2 what is the product…
C. $CO_2$
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question 14 (1 point) in the reaction: h2 + o2 → h2o which are the reac…
B. $H_2$ and $O_2$
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1. what is the group number for each of the following groups; a. noble …
1. a. Group 18 b. Group 2 c. Group 17 d. Groups 3 - 12 e. Group 1 2. Helium, Neon 3. Lithium, Sodium, Potassium 4. Scandium, Titanium 5. Periods; Same number of electron shells
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question 13 (1 point) what are the substances made after a chemical rea…
B. Products
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which pair of elements would most likely form a covalent bond? sodium a…
For the first question: Hydrogen and oxygen For the second question: Reactants
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what is the chemical name of nacl? sodium chlorine nitrogen chloride so…
1. C. Sodium chloride 2. True
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write the name of the element that corresponds to each of the following…
21. Copper 22. Potassium 23. Carbon 24. Gold 25. Zinc 26. Lead 27. Iron 28. Sodium 29. Sulfur 30. Aluminum 31. Calcium 32. Silver 33. Phosphorus 34. Oxygen 35. Iodine 36. Tin 37. …
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what type of bond forms when electrons are shared? ionic metallic coval…
1. C. Covalent 2. B. A nonmetal and a metal
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in co₂, what does the \2\ mean? two carbon atoms two oxygen atoms two m…
For the first question: B. Two oxygen atoms For the second question: False
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what does a chemical formula show? the cost of a chemical the number an…
What does a chemical formula show? - B. The number and types of atoms in a substance In H₂O, how many hydrogen atoms are there? - B. 2
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4. which of the following correctly describes the trend in atomic radiu…
Atomic radius decreases because protons pull the electrons closer.
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what is a compound? a type of atom atoms that do not bond together two …
Question 1: C. Two or more atoms bonded together Question 2: True
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write the symbols for the following elements. 1. oxygen 2. hydrogen 3. …
1. O 2. H 3. Cl 4. Na 5. F 6. C 7. He 8. N 9. Cu 10. S 11. Mg 12. Mn 13. Ne 14. Br 15. P 16. Ag 17. Pb 18. Fe 19. Ca 20. K
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in an ionic bond, the two elements that come together to form one * 1 p…
For the first question: C. nonmetal For the second question: Ionic bond
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in an ionic bond, electrons are... * 1 point shared transferred split
Transferred
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there are 3 terms we should know when talking about dissolving substanc…
The salt is the solute. The water is the solvent. The salt - water mixture is the solution.