Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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atoms can be highly reactive or very stable. the periodic table is arra…
1. Green smiley face 2. Blue star
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frosts \design\ has 14 lines, which makes it a both stanzas follow diff…
1. sonnet 2. rhyme 3. iambic; unstressed; stressed 4. observes 5. allusion 6. brew (or potion) 7. simile
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3. which ions are most likely formed by the following elements? a. li b…
a. \(Li^+\) b. \(Na^+\) c. \(K^+\)
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a sample of gas has a volume of 3.40 l at 10.0°c. what will be its volu…
For the first question: 4.48 L For the second question: 6.87 L
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a 4.00 l sample of a gas is at a pressure of 2.00 atm. if the temperatu…
For the first question: \(16.0\ L\) For the second question: \(214\ mL\)
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a 3.00 l sample of a gas at a pressure of 4.00 atm is compressed to 2.0…
6.00 atm ---
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a hot air balloon is filled to a volume of 44.5 l at 758 torr. what wil…
45.1 L
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10 which state of matter has particles that are tightly packed with min…
C. Solid
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8 what defines an element? a a substance that can be broken down into s…
D. A substance that cannot be broken down into simpler substances
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why is daltons atomic theory considered a scientific theory rather than…
C. Because it was based on extensive research and experimentation
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6 what did daltons atomic theory propose about atoms? a they can be eas…
C. They cannot be divided or destroyed
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5 what makes atoms of the same element similar? a their temperature onl…
B. Their mass and properties
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3 which statement best describes atoms according to modern atomic theor…
C. They have internal structure and vary in mass
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2 which state of matter would party balloons contain? a plasma b gas c …
B. Gas
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kente cloth, a sacred textile woven by african artists has what visual …
- First question: bright colors, with geometric designs - Second question: Wood, Shells, Bronze, Terracotta
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question what is the rhyme scheme in the following lines from robert fr…
B. abcb
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elements of poetry poetry is a form of literary expression that differs…
- Literal Meaning versus Figurative Meaning: common; literal - Structure: arrangement; number - Rhyme: sound - Meter: pattern - Speaker: narrates - Figures of Speech - Allusion: w…
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3.what is true about elements that are in the same column (group/family…
Elements in the same column (group/family) have similar chemical properties due to having the same number of valence electrons.
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3 complete the table using your knowledge of the periodic table
| Symbol | Atomic Number | Mass Number | Number of Protons | Number of Electrons | Number of Neutrons | | ---- | ---- | ---- | ---- | ---- | ---- | | Na | 11 | 23 | 11 | 11 | 12 |…
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2.which part of the atom allows one atom to react with another one?
The outermost electrons (valence electrons) of the atom.
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select the correct answer. what is the rhyme scheme in this excerpt fro…
C. ababa
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complete the table using your knowledge of the periodic table
| Symbol | Atomic Number | Mass Number | Number of Protons | Number of Electrons | Number of Neutrons | |---|---|---|---|---|---| | Na | 11 | 23 | 11 | 11 | 12 | | K | 19 | 39 | 1…
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multiple choice: how many electrons are in the outermost shell of an at…
A. 5
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multiple choice: of the following choices, the ph of the least acidic s…
B. 6.0
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question 10 (1 point) alkyl halides are hydrocarbons that contain at le…
A. 1,5 - dichloro - 2 - methylcyclohexane
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select the correct answer. what is the rhyme scheme in this excerpt fro…
C. ababa
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1.what does the atomic number represent on the periodic table?
The atomic number on the periodic table represents the number of protons in an atom's nucleus.
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formula of the unsaturated hydrocarbon is: a) ch₃ - ch₂ - ch ≡ ch - ch₂…
A. \(CH_3 - CH_2 - CH\equiv CH - CH_2 - CH_3\), C. \(CH_3 - CH_2 - C\equiv C - CH_2 - CH_3\), D. \(CH_3 - CH = CH - CH_2 - CH_2 - CH_3\)
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question 38 an atom with the atomic number 9 would most likely: a lose …
C. gain 1 electron
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question 8 (1 point) organic compounds contain very few elements, where…
B. Germanium
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11 classify the following physical properties of matter as either exten…
- **Extensive Property**: Enthalpy, Mass, Volume - **Intensive Property**: Color, Density, Luster
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question 7 (1 point) what is the shape of an alkyne molecule? a) bent b…
B. linear
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7 which of these is not a physical property of matter? select all that …
B. reactivity, D. flammability
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the iupac name of the following organic compound is cl cl a) 1, 3 - dib…
B. 1, 3 - dichlorobenzene
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9 which of the following correctly summarizes the process of ice turnin…
A. a solid to a liquid to a gas
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8 which metric unit can be used for the volume of a liquid? a grams per…
C. milliliters (mL)
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question 5 (1 point) the name of the compound shown below is________. a…
d) cyclohexane
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ionic bonds are formed by: a electron transfer b proton sharing c hydro…
A. electron transfer
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question 30 electrolytes that release hydrogen ions in solution are con…
D. acids
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consider the following statements about the zn and mg atoms. which stat…
Zn and Mg are diamagnetic in their ground electronic state.
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covalent bonds are formed by: a electron transfer b buffers c electron …
C. electron sharing
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which one of the following atoms (designated by complete electron confi…
\(1s^{2}2s^{2}2p^{5}\)
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question 27 an ion (electrolyte) that carries a positive charge is refe…
C. cation
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what is the ground state electron configuration for the te atom (z = 52…
\([Kr]5s^{2}4d^{10}5p^{4}\) (the fourth option)
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which of the following species releases the most energy when an electro…
O
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which of the following has the largest atomic radius? n p s se
Se
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which atom is the most electronegative? cl ni h y se
Cl (Chlorine)
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what is the ground state electron configuration of fe^{3+}? the atomic …
\[ [Ar]3d^{5} \]
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question 3 (1 point) consider the following structure of a compound: th…
d) propene
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which of the following represents the correct arrangement of electrons …
D. 2, 8, 6
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part c. distillation - answer the following questions concerning distil…
- **Part C**: Acetone would separate out first. Because in distillation, substances vaporize when the temperature reaches their boiling point. Among the given substances ($2 - $Pr…
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question 15 an element with the atomic number 12 would contain: a 24 pr…
C. 12 protons
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question 14 on the ph scale, a fluid with a ph of 14 is considered to b…
B. False
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question 2 (1 point) how many carbon atoms are in 3 - methyl - 4,4 - di…
e) 18
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question 69 the density of unknown metal c is 22.53 lb/gal. what is the…
\(2.70\ g/mL\)
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before an ancient egyptians dead body entered a tomb, it had to be prop…
1. Almost all organs are taken out of the body. Some are placed in special jars. 2. Once the organs are removed, the body is covered in salty chemicals to dry it out. 3. Once the …
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a 0.75 mol gas occupies 15.0 l at 310 k. find the pressure.
\(P = 1.27\space atm\)
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an isotope represented as s - 34: has 34 protons. contains exactly 18 n…
none of the above
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an isotope represented as s - 34: has 34 protons. contains exactly 18 n…
none of the above
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ammonia (nh₃) chemically reacts with oxygen gas (o₂) to produce nitric …
\(15\space g\)
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select the correct answer. an iron nail is made up of particles. what i…
D. They stay in place and vibrate.
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part a the number of protons in the nucleus of an atom: identifies the …
all of the above
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select the correct answer. when a perfume bottle is opened, some liquid…
A. Gases do not have a definite volume.
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ammonium phosphate ((nh4)3 po4) is an important ingredient in many soli…
$1.9\space mol$
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how many protons are found in k - 40? 19 40 0 21 none of the above subm…
19
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part a what is the mass number of an ion with 109 electrons, 158 neutro…
\(268\)
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iodine gas (i₂) and solid potassium (k) are produced by the decompositi…
\( 2\text{KI}(s) ightarrow2\text{K}(s)+\text{I}_2(g) \)
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before an ancient egyptians dead body entered a tomb, it had to be prop…
1. Almost all organs are taken out of the body. Some are placed in special jars. 2. Once the organs are removed, the body is covered in salty chemicals to dry it out. 3. Once the …
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7 écris la formule chimique et le nom des composés les plus probables f…
a) Formule chimique : \(NaOH\), Nom : Hydroxyde de sodium. b) Formule chimique : \(NH_4F\), Nom : Fluorure d'ammonium. c) Formule chimique : \(K_2CO_3\), Nom : Carbonate de potass…
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solid silver bromide and aqueous potassium nitrate are produced by the …
\(AgNO_3(aq)+KBr(aq)\to AgBr(s)+KNO_3(aq)\)
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drag and drop the words or phrases that accurately complete the scenari…
Investigation #1: Type: descriptive Limitation: researcher bias Investigation #2: Limitation: variables not controlled Investigation #3: Benefit: multiple trials
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a chemist weighed out 101. g of potassium. calculate the number of mole…
$2.58$
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sally decides to test a couple of her favorite bottled water brands sol…
comparative
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aqueous hydrobromic acid (hbr) reacts with solid sodium hydroxide (naoh…
$79\%$
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aqueous hydrobromic acid (hbr) reacts with solid sodium hydroxide (naoh…
$4.1\ \text{g}$
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nitrogen (n₂) gas and hydrogen (h₂) gas react to form ammonia (nh₃) gas…
\(H_{2}\)
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gaseous ammonia chemically reacts with oxygen (o₂) gas to produce nitro…
\(0.12\space mol\)
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part b why is temperature a good criterion for searching for earthlike …
Temperature is a good criterion for searching for Earth - like exoplanets because it determines the state of water (liquid water is vital for life as we know it) and affects chemi…
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explaining physical responses to bullying deep inside the emotional cen…
cortisol
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solid magnesium (mg) reacts with aqueous iron(iii) chloride (fecl₃) to …
\(3Mg(s)+2FeCl_{3}(aq)=2Fe(s)+3MgCl_{2}(aq)\)
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balance the chemical equation below using the smallest possible whole n…
\(2CH_3CH_3(g)+7O_2(g)\to4CO_2(g)+6H_2O(g)\)
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what is the total number of oxygen atoms on the right - hand side of th…
32
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1.50 g of a certain compound x, known to be made of carbon and hydrogen…
\(C_6H_6\)
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label this diagram of an atom:
- La estructura central (con protones y neutrones) se etiqueta como "Núcleus". - Las partículas amarillas con carga positiva (en el núcleo) se etiquetan como "Proton". - Las partí…
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there are only two naturally - occurring stable isotopes of lithium, th…
The natural abundance of \(^{6}\text{Li}\) is \(7.5\%\) and the natural abundance of \(^{7}\text{Li}\) is \(92.5\%\).
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this is the chemical formula for diethyl ether: (ch₃ch₂)₂o. calculate t…
\(65\%\)
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label this elements card with the correct terms: 8 o oxygen 15.999 elem…
- 8: Atomic Number - O: Atomic Symbol - Oxygen: Element Name - 15.999: Atomic Mass
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a chemist determined by measurements that 0.0700 moles of aluminum part…
\(1.89\space g\)
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the chemical formula for magnesium sulfide is mgs. a chemist determined…
\(4.2\space g\)
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chemistry quiz possible points 1 metallic covalent ionic bonding betwee…
- **Metálico**: - Entre qué tipos de elementos?: Metales con metales - ¿Qué pasa con los electrones?: Libremente vagando - **Covalente**: - Entre qué tipos de elementos?: No metal…
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which set of quantum numbers will identify an electron in a 4p subshell…
Both B. \([4,1,0]\) and C. \([4,1,-1]\)
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chemistry quiz possible points: 1 the horizontal rows on a periodic tab…
1. Períodos 2. Capas electrónicas 3. Grupos 4. Electrones de valencia
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which of the following is not an allowable set of quantum numbers n, l,…
D. Both A and C are NOT allowed.
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aqueous hydrochloric acid (hci) will react with solid sodium hydroxide …
$0\ \text{g}$
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aqueous sulfuric acid (h₂so₄) reacts with solid sodium hydroxide (naoh)…
$0.41\space g$
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aqueous hydrobromic acid (hbr) will react with solid sodium hydroxide (…
$77.6\space g$
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what are the values of m when l = 2 and how many orbitals are there? -2…
-2, -1, 0, 1, 2 and there are 5 orbitals
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nitrogen dioxide (no₂) gas and liquid water (h₂o) react to form aqueous…
\(3.3\space mol\)
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nitrogen (n₂) gas and hydrogen (h₂) gas react to form ammonia (nh₃) gas…
\(H_{2}\)
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ammonium phosphate \\( ( ( nh _ { 4 } ) _ { 3 } po _ { 4 } ) \\) is an …
\(14\space g\)