Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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which is not a way to make an atom more stable? select the two answers …
D. Freeze the shell
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the 8 electrons in neons outer shell make it stable. sometimes. false. …
# Breve explicación: Los gases nobles, como el neón, tienen 8 electrones en su capa externa (con excepción del helio), lo que les da estabilidad electrónica y los hace químicament…
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how many total electrons are found in neon? 6 2 10 8 too many to count …
# Explicación: ## Paso 1: Identificar el número atómico de neón El número atómico de neón es 10. ## Paso 2: Relacionar el número atómico con los electrones En un átomo neutro, el …
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the chemistry of carbon previewing the next topic part a: coloring the …
1. Carbon (C), Hydrogen (H), Oxygen (O), Nitrogen (N) 2. It can form diverse and complex organic molecules; 4 valence electrons 3. Single, double, and triple covalent bonds 4. A v…
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in the second shell, how many electrons are required so that the atom i…
# Explicación: ## Paso 1: Recordar la regla de electrones en capas La segunda capa de un átomo puede contener un máximo de 8 electrones para que el átomo sea estable. # Respuesta:…
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pregunta de opcion multiple how does hydrogen behave compared to helium…
Hydrogen is reactive and helium is stable
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how is hydrogen different from helium? hydrogen only has one shell hydr…
Hydrogen only has 1 proton (and 1 electron)
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how many energy levels are found in helium? 2 3 1 4 volver a ver
# Explicación breve: El helio es el segundo elemento en la tabla periódica y tiene dos electrones. Estos dos electrones se encuentran en el primer nivel de energía, que es el nive…
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in the following diagrams, the spheres represent atoms of different ele…
Container C represents a pure substance, but containers A, B, and D represent mixtures.
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which electrons participate in making chemical bonds? electrons in the …
Electrons in the outermost shell
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question 1-19 rutherfords gold foil experiment confirmed that atoms con…
C. neutrons and protons
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what are held in the shells/rings? neutrons protons electrons nucleus
C. Electrones
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question 1-17 a salt may be used in various ways, depending on its prop…
A salt is a combination of an acid and a base.
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which two subatomic particle always equal each other in an atom? (selec…
A. Electrons C. Protons
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pregunta de opción múltiple why are atoms electrically neutral? they on…
Protons and electrons are even in number
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na + cl₂ => nacl rb + s₈ => rb₂s h₃po₄ + ca(oh)₂ => ca₃(po₄)₂ + h₂o nh₃…
$2Na + Cl_2 = 2NaCl$; $16Rb + S_8=8Rb_2S$; $2H_3PO_4 + 3Ca(OH)_2=Ca_3(PO_4)_2+6H_2O$; $NH_3 + HCl=NH_4Cl$; $2Li + 2H_2O = 2LiOH+H_2$; $Ca_3(PO_4)_2+3SiO_2 + 5C=3CaSiO_3+5CO + 2P$;…
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where are the electrons located in the atom? electron cloud center nucl…
# Explicaciones Breves: Los electrones se encuentran en la nube electrónica que rodea el núcleo del átomo. El núcleo contiene protones y neutrones y está ubicado en el centro del …
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which of the following are included in the nucleus of an atom? (select …
# Explicación breve: El núcleo de un átomo está formado por protones y neutrones. Los electrones se encuentran en la nube electrónica que rodea el núcleo. # Respuesta: - Neutron -…
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pregunta de opción múltiple where is the electron cloud? inside of the …
D. surrounding the nucleus
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what are the basic units of chemical elements? molecules elements atoms…
atoms
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a&p flix quiz: events at the neuromuscular junction 6 parts | 0.83 of 1…
The inside surface of the sarcolemma is negatively charged compared to the outside surface. Sodium ions diffuse inward along favorable chemical and electrical gradients.
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question 1-15 some elements are more reactant than others depending on …
D. Cooling of the reaction mixture.
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10. 1 out of 3 cancer deaths are caused by smoking. (1 point) true fals…
10. True 11. Both A and B 12. True 13. False
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7. how long does it take for nicotine to be carried within the bloodstr…
7. 10 seconds 8. Triggers body to release endorphins which gives you a pleasurable sensation 9. Nicotine
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the oxygen takes electrons away from the hydrogen atom in order to fill…
True
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4. smoking does not cause chronic illness like bronchitis and emphysema…
4. B. False 5. C. Tiny hair like structures that keep the airways clean. 6. D. None of the Above
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c_{10}h_{22}+o_{2}=>co_{2}+h_{2}o al(oh)_{3}+hbr=>albr_{3}+h_{2}o ch_{3…
$2C_{10}H_{22}+31O_2 = 20CO_2+22H_2O$; $Al(OH)_3 + 3HBr=AlBr_3 + 3H_2O$; $2CH_3CH_2CH_2CH_3+13O_2 = 8CO_2 + 10H_2O$; $C + O_2=CO_2$; $C_3H_8+5O_2 = 3CO_2+4H_2O$; $3Li+AlCl_3 = 3Li…
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1. with every inhalation, more than 5,000 chemicals go into the tissues…
1. False 2. All of the Above 3. the loss of smell and taste
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the outermost electron shell is known as the sea shell. epic shell. val…
valence shell
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6. why is second handsmoke harmful and how dangerous is it for nonsmoke…
6. Second - hand smoke is harmful because it contains numerous toxic chemicals. It is dangerous for non - smokers as it can lead to respiratory and cardiovascular diseases and inc…
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name_ flame test lab the electrons in an atom occupy different energy l…
This is an experiment to identify cations of different chloride - salt solutions through flame tests. The cations are Li⁺, Na⁺, K⁺, Ca²⁺, Sr²⁺, Ba²⁺, Fe²⁺, Cu²⁺, Sn²⁺, Mn²⁺ as lis…
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1. how can you tell if your are addicted to vaping? (10 points) enter y…
1. Look for signs like strong cravings, withdrawal symptoms, increased tolerance, and excessive time spent on vaping. 2. Yes, they may be more likely due to factors like nicotine …
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question 3 of 7 atoms are made of molecules. true false
False
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16. lipophilia means (4 points) * fat people absorb more marijuana peop…
16. THC dissolves in fat tissue 17. Hookah has much more smoke density and carcinogens 18. Smoking
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question 2 of 7 why cant atoms be trusted? they are liars. bad parentin…
None of the given options are correct as they attribute human - like characteristics to atoms which is incorrect. Atoms are fundamental particles and do not have such behaviors.
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13. drug use means (4 points) * a doctor gives you medicine a person is…
13. C. a person is bringing a chemical into their body 14. C. clear the lung tissue of tar 15. A. You experience pleasure
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3. model 2 illustrates a chemical reaction. write the reaction as an eq…
3. ATP + H₂O → ADP + Pi + Energy 4. The hydrogen and oxygen atoms from the water molecule are used to form ADP and Pi. 5. Hydro (water) is used to break (lysis) the high - energy …
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10. cancer - causing chemicals are called. (4 points) stimulants nicoti…
10. C. Carcinogens 11. False, they are taking in chemicals. 12. False, vaping is a form of smoking which is not allowed.
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7. smoking tobacco and marijuana are forms of (4 points) · oral use tra…
7. None of the above options are correct as smoking is inhalation. But if we assume the closest wrong - category - based choice is not available, and we have to pick from given on…
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question 1 of 7 atom means easily cut. true false
False
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1. smokers often have poor circulation to their extremities because of …
1. Atherosclerosis 2. Lipophilic 3. Any chemical that alters body or mind
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3 multiple choice 1 point what happens during a supernova? hydrogen pro…
Material from a high - mass star explodes.
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sound is a form of ____________ energy. a. thermal b. radiant c. mechan…
C. mechanical
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write a summary statement for saturated fats including whether they are…
Saturated fats have all single carbon - to - carbon bonds and are solids at room temperature.
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understanding matter: basic particles what are atoms & elements? atom t…
1. Atom 2. Element 3. Atom 4. Element 5. Atom
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a student drew this molecular model to represent liquid water at 10°c. …
D) Show the water molecules with longer arrows to represent an increase in motion.
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8. even if a client knows exactly which type of braid style they want, …
9. F - The time to achieve a braided style can vary greatly. 10. T 11. T 12. T 13. F - A client intake form is still important. 14. T
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understanding matter: molecules and compounds what is a molecule? two -…
Water ($H_2O$) - Compound Oxygen Gas ($O_2$) - Molecule Salt ($NaCl$) - Compound Nitrogen Gas ($N_2$) - Molecule Carbon Dioxide ($CO_2$) - Compound
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understanding matter: molecules and compounds what is a molecule? two o…
Water ($H_2O$) - Compound Oxygen Gas ($O_2$) - Molecule Salt ($NaCl$) - Compound Nitrogen Gas ($N_2$) - Molecule Carbon Dioxide ($CO_2$) - Compound
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question 11 1 pts calcium carbonate is generally insoluble in water bec…
Question 11: C. electrostatic forces, greater Question 12: B. electrostatic forces, less
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in a solution, the formation solvent - solute attractions is referred t…
1. A. solvation 2. D. greater
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pick the number the statement which is not a characteristic of solution…
For the first question: 3 For the second question: decrease, dispersal
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match each of the following solutions according to the solute/solvent c…
air: O2(g) / N2(g) saltwater: Na+(aq) and Cl-(aq) / H2O(l) brass: Zn(s) / Cu(s) carbonated water: CO2(g) / H2O(l)
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the element rhenium (re) has two naturally - occurring isotopes, ¹⁸⁵re …
The atomic mass of $^{187}$Re is approximately $188.53$ u.
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dissolving potassium dichromate (k₂cr₂o₇) in water results in a solutio…
C. 2:1
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when a solute completely dissolves it is distributed ____________ among…
1. C. uniformly 2. D. water
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question 1 1 pts solutions, defined as__________ of two or more substan…
Question 1: B. homogeneous mixtures Question 2: C. solvent, solute
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what is the simplest unit of a chemical compound in which the units are…
B. Molecular compound
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why is an ionic compound more stable than its individual reactive eleme…
Because the formation of the ionic bond releases energy as light and heat.
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why is it important to know the physical properties of compounds in a l…
To identify possible uses of the compound and handle spills properly
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question 25 1 pts what is the formula for magnesium sulfide? o mgs3 o m…
MgS
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what is the primary method used to produce salts from seawater? solar e…
Solar evaporation
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question 23 1 pts the correct name for ccl4 is _. monocarbon tetrachlor…
Question 23: D. carbon tetrachloride Question 24: C. Mo(ClO)₄
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what type of bond is formed when there is a large electronegativity dif…
B. Ionic bond
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question 21 1 pts determine the name for cl₂o. chlorine (i) oxide chlor…
Question 21: D. dichlorine monoxide Question 22: A. \(Mg_3N_2\) / magnesium nitrite
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what is the primary method used to produce salts from seawater? solar e…
Solar evaporation of water from brine.
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10. an element has an atomic number of 76. the number of protons and el…
10. d. 76 protons and 76 electrons 11. b. Mass number 12. a. numbers of neutrons 13. d. mass numbers
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determine the name for aqueous hbr. bromic acid bromous acid hydrobromi…
1. C. hydrobromic acid 2. E. tetraphosphorus decoxide
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what is the primary use of lithium in modern technology? creating synth…
B. Manufacturing batteries
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write the name for sn(so4)2. remember that sn forms several ions. o tin…
tin (IV) sulfate Ca₃(PO₄)₂
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match each item with the correct statement below a. proton b. nucleus c…
1. c. Atom 2. a. Proton 3. d. Electron 4. e. Neutron 5. b. Nucleus 6. a. atom 7. c. neutral, with the number of protons equaling the number of electrons 8. c. protons and neutrons…
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question 15 1 pts the compound scl₅ is named sulfur pentachloride monos…
Question 15: sulfur pentachloride Question 16: $P_4O_{10}$
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all of the following are in aqueous solution. which is incorrectly name…
First question: HBr, bromic acid Second question: $ClO^-$
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which of the following is not listed as a physical property that can he…
Electrical conductivity
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which of the following formulas is incorrect? aio₃ kno₃ li₂o caso₄ kbr …
First question: A. $AlO_3$ Second question: C. nickel(II) oxide
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the name for al(oh)₃ is aluminum(iii) hydroxide aluminum hydroxide alum…
Question 9: aluminum hydroxide Question 10: $\text{Au}_2\text{O}$
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the correct formula for silver iodide is o agi₂ o si o ag₂i o agi quest…
The correct formula for silver iodide: D. $AgI$ The name of the compound $NH_4BrO_2$: A. ammonium bromite
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what is the formula for dinitrogen tetrachloride? n₃cl₅ n₄cl₄ n₂cl₄ n₂c…
1. C. $N_2Cl_4$ 2. A. $Na_2CO_3$
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the name for the acid h₂so₃ is sulfuric acid hydrosulfuric acid sulfuri…
1. D. sulfurous acid 2. D. phosphorus triiodide
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what is the correct formula for lithium phosphate? li3po4 li3(po4)2 li(…
First question: $Li_3PO_4$ Second question: nitric acid
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what is true about a generic drug? o a. it is an inactive substance. o …
D. It is often named for its chemical structure.
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check your learning 1. explain why the boiling point of water is a char…
4. The volume of the pure - iron sample is approximately $0.635\ cm^{3}$. 5. The density of the metal is $8.96\ g/cm^{3}$, and it is likely copper. 6. The mass of the pure - coppe…
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in chemistry, the ph of a solution is defined to be ph = - log h⁺ where…
$4.9$
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fill in the blank question elements in the third period of the periodic…
3
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fill in the blank question elements in the third period of the periodic…
3
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fill in the blank question in an electron dot diagram, each dot represe…
outermost
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multiple choice question how do the number of valence electrons and the…
same valence electrons, different number of energy levels
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multiple select question select all that apply the second row of the pe…
A. ends with the noble gas neon. B. has elements with two occupied energy levels. D. includes eight elements.
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part c in this section, you will work with a partner. you and your part…
| Description | Physical and Chemical Change | |--|--| | Using a flashlight | Physical change | | Boiling Water | Physical change | | Hydrochloric acid reacts with potassium Hydro…
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multiple choice question in a neutral atom, which subatomic particles a…
B. electrons and protons
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the compound dopamine contains 62.72% c, 7.24% h, 20.89% o, and 9.15% n…
$C_8H_{11}NO_2$
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chlorine is a gas that reacts with metals to form salts. based on perio…
B. bromine below it
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5. what are 2 examples of chemical change? 6. fill in the blank: all ch…
5. Rusting of iron, burning of wood 6. Energy changes, color changes, gas evolution, precipitation formation 7. Physical change: Melting of ice; Chemical change: Hydrogen and oxyg…
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fill in the blank question the first row of the periodic table includes…
Hydrogen, Helium
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fill in the blank question vertical columns in the periodic table are c…
Groups
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fill in the blank question each electron energy level is represented by…
period
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fill in the blank question each electron energy level is represented by…
principal quantum number (n)
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multiple choice question what is the term for the horizontal rows of el…
A. periods
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fill in the blank question outermost energy level electrons, which dete…
valence
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7. fill in the chart: write physical change and chemical change for the…
| Description | Physical and Chemical Change | |--|--| | Condensing water vapor | Physical change | | Combustion of gasoline | Chemical (and physical) change | | Turning water int…