Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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what conditions will produce rocks with crystals? (site 2)
Slow cooling of molten rock, availability of necessary chemical elements, and a stable cooling environment.
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4. how does the structure of the water molecule make it a good solvent?…
It is polar
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semester 1, skills labs week 7, day 1 mr. martin is a 28 - year - old p…
A. Blood tests (e.g., CBC, LFTs), imaging (CT/MRI), colonoscopy. Rationale: Assess anemia, liver function, cancer spread, and primary tumor. B. Cancer progression with possible li…
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31 why are the noble gases the most unreactive group of elements on the…
D. Because their outer shells are filled
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the electrons of an atom that are in the outermost shell are known as _…
D. valence
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complete the sentence with the best correlative conjunctions. when sulf…
C. both... and
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3. what is the relationship between solvents and solutes? solutes disso…
Solvents dissolve solutes.
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why is the atomic mass of an element not given as a whole number on the…
D. because atomic mass is the average relative atomic mass of all isotopes of the element
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what is the average mass of carbon, if there is 97% c - 12, 2% c - 13, …
B. \((0.97)(12)+(0.02)(13)+(0.01)(14)=12.04\)
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what is the average atomic mass of lithium, if it is 90% li - 7, 5% li …
C. (0.9)(7)+(0.05)(6)+(0.05)(5)=6.85
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2. how does the structure of the water molecule lead to its ability to …
It is a polar compound
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26 if an element has 3 common isotopes and the abundance of two of the …
C. 30%
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25 what are isotopes? a very rare elements b atoms of elements that are…
C. Atoms of elements that have different numbers of neutrons
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24 for what reason is atomic mass in a decimal form on the periodic tab…
C. It is the average relative atomic mass of all isotopes of the element
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what two parts of the atom have an atomic mass of approximately 1 amu (…
B. protons and neutrons
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1. what are some fundamental properties of water? choose all that apply…
It expands when it transitions to a solid. It is a universal solvent. It has the ability to corrode rocks. It can hold a large amount of heat.
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complete the sentence with the best correlative conjunctions. on earth,…
not only... but also
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below is the complete decay chain of uranium - 238. you need to work ou…
$_{90}^{234}Th ightarrow_{91}^{234}Pa + _{-1}^0e+\gamma$; $_{91}^{234}Pa ightarrow_{92}^{234}U+_{-1}^0e + \gamma$; $_{92}^{234}U ightarrow_{90}^{230}Th+_{2}^4He+\gamma$; $_{90}^{2…
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atomic orbitals (see 117) 7. is the following sentence true or false? a…
7. True 8. more 9. 2 10. b. two 11. True 12. a. The electrons are in the most stable configuration.; c. The atom is in its ground state.
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section 4.2 the structure of an atom (pages 108 - 112) this section com…
No specific question was asked in the provided text. However, if one were to fill the table: - What I Know About Atoms: Atoms are building blocks of matter, may contain subatomic …
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bonus: after 4 half - lives, a sample of polonium - 218 has a mass of 1…
192 grams
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section 4.3 modern atomic theory (pages 113 - 118) this section focuses…
Ground state; Returns to ground state
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match the phrase with the subatomic particle being described. drag & dr…
What is the positively - charged particle of an atom? - Proton(s) What is the neutrally - charged particle of an atom? - Neutron(s) What is the negatively - charged particle of an…
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what subatomic particle always determines the identity of an atom? a pr…
A. Protons
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17 what sub - atomic particles are found in the nucleus of an atom? (se…
D. Protons, E. Neutrons
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14 how many neutrons is in a tellurium atom? (this is a mathematic prob…
C. 76
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13 how many electrons are on the outer most shell of boron? a 2 b 8 c 3
C. 3
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of the x atoms in a certain molecule, 44% are carbon. which expression …
B. $0.44x$
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part i - explore the atom open the build an atom simulation - click on …
1. The proton goes to the nucleus. 2. The neutron goes to the nucleus. 3. The electron goes to the orbits. 4. Protons and neutrons. 5. Electrons. 6. Hydrogen. 7. The element chang…
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part ii - building atoms of elements build the following atoms of eleme…
| Directions | Subatomic Particles | What Element | Diagram (description) | |---|---|---|---| | Add 5 protons, Add 6 neutrons, Add 5 electrons | $p = 5$, $n=6$, $e = 5$ | Boron (B…
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construct the expression for kp for the following reaction. n₂(g) + o₂(…
Numerator: $(P_{NO})^2$ Denominator: $P_{N_2}\times P_{O_2}$
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problem 3 of 28 a (blue) ⇌ b (red) the equilibrium constant (k) for thi…
C
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atomic structure practice complete the following table. *remember that …
| Symbol Notation | Atomic Number | Number of Protons | Mass Number | Number of Neutrons | Number of Electrons | |---|---|---|---|---|---| | $^{122}_{51}Sb$ | 51 | 51 | 122 | 71 |…
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write the ions first then write the chemical formula 1) mg+1, o-2 → mg1…
1. \(MgO\) (Note: Magnesium forms \(Mg^{2 + }\) not \(Mg^{+1}\), so the correct formula is \(MgO\)) 2. \(LiBr\) 3. \(Ca_{3}N_{2}\) 4. \(Al_{2}S_{3}\) 5. \(KI\) 6. \(SrCl_{2}\) 7. …
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which of the following statements are always true for a reaction at equ…
A. I and II
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which of the following is true for a reaction at equilibrium? problem 1…
C. The rate of the forward reaction is equal to the rate of the reverse reaction.
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which is a property of covalent compounds? a high boiling point b form …
B. form when atoms share electrons
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6. draw the lewis structure diagrams for the following molecular compou…
1. $2\mathrm{H_2O}\to2\mathrm{H_2}+\mathrm{O_2}$, Decomposition 2. $2\mathrm{KI}+\mathrm{Pb(NO_3)_2}\to\mathrm{PbI_2}+2\mathrm{KNO_3}$, Double - displacement 3. $3\mathrm{H_2}+\ma…
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chapter 4 atomic structure atomic number and mass number (page 110) 5. …
5. False 6. atomic 7. False 8. mass 9. Number of protons 10. protons, electrons 11. neutrons 12. Isotopes 13. b. 10 14. False
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the arrangement of subatomic particles and the bohr model of the atom a…
Element A is carbon. The symbol of this element is C. It has an atomic number of 6 which tells me that there are 6 protons. In this neutral atom the number of protons = the number…
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#16 formula sheet calculator periodic table heating curve of water temp…
A. the heat of fusion
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which of the following best describes the difference between solids, li…
Solids have a definite shape and volume, liquids have a definite volume but no definite shape, and gases have neither a definite shape nor volume.
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what would be the balanced formula for a compound made from beryllium a…
A. $BeCl_{2}$
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which model correctly shows a stable ionic compound of magnesium chlori…
B.
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10physicalscience_interim 1_25-26 #13 formula sheet calculator periodic…
B. The substance melts or boils because it is undergoing an endothermic phase change.
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oxygen, $^{16}_{8}o$ $1s^{2}2s^{2}2p^{4}$ what would happen to this oxy…
C. It would transform into the atom carbon - 12 with an electrical charge of 2.
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chapter 4 atomic structure thomsons model of the atom (pages 102 - 103)…
5. repel; attract 6. negative 7. a. An atom is filled with positive matter.; c. Negative charges are scattered throughout an atom. 8. alpha particle 9. a. More alpha particles wer…
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section ii: balancing chemical equations balance the following chemical…
1. $2,3,4,3$ 2. $1,9,6,6$ 3. $2,6,2,3$ 4. $1,2,1,1$ 5. $3,2,3,1$ 6. $4,2,2,5$ 7. $1,1,1,1$ 8. $1,1,1,1$ 9. $3,2,1,6$ 10. $4,5,2$ 11. $1,4,3,4$ 12. $1,1,2,1$ 13. $1,12,12,11$ 14. $…
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section 4.1 studying atoms (pages 100 - 105) this section discusses the…
1. atoms 2. True 3. atoms; divided 4. a. All elements are composed of atoms. b. In a particular compound, atoms of different elements always combine the same way.
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density worksheet chemistry a instructions: answer the following questi…
1. The density of the brown sugar is $1.5375$ g/mL 2. The density of the cooking oil is approximately $0.8236$ g/mL 3. The density of the cork is approximately $0.253$ g/mL
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2. what are all of the required components of a flow - diagram? 3. will…
# Explanation: ## Step1: Identify compound type for $NaClO_3$ $NaClO_3$ is an ionic compound. Sodium ($Na^+$) is a metal and chlorate ($ClO_3^-$) is a poly - atomic ion. The name …
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phase change diagram navigate to question at position 2, unanswered the…
- From B -> C, the temperature does not change - As time advances, the particles are moving faster and faster from A -> B - This phase change diagram is not for water - The diagra…
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learning goal: to understand several methods of measuring gas pressure.…
$1.19$ (rounded to two decimal places)
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complete the sentence. an ____________ is a ____________ that _________…
An enzyme is a protein that speeds up the rate of a chemical reaction by lowering the activation energy needed for the reaction to proceed.
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solar - powered cars use energy from the sun to work. a panel on the ca…
radiant, electrical, mechanical
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first read: concept vocabulary identify the choice that best answers th…
D. How do two presidential candidates differ in their goals for the country?
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solar - powered cars use energy from the sun to work. a panel on the ca…
radiant, electrical, mechanical
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wood has chemical energy, which can be used to generate thermal and rad…
The total energy in the system remains the same as the decrease in chemical energy equals the increase in thermal and radiant energy.
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4. observation and analysis (15 minutes) have students record their obs…
5. Chemical composition, pH, solubility etc. contribute to effectiveness. 6. From initial assumptions to knowledge of chemical reactions and mechanisms. 7. Observation, data analy…
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the human body stores chemical energy from digested food. some of the c…
Digested food is a source of potential energy.
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what are the two main types of energy? kinetic and potential thermal an…
kinetic and potential
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savion listed the steps involved when nuclear power plants generate ele…
Reorder the steps so that step 6 appears before step 5.
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which change is an example of transforming potential energy to kinetic …
None of the provided options are examples of transforming potential energy to kinetic energy.
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a light energy, chemical energy b water, oxygen c electromagnetic energ…
A. light energy, chemical energy
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reduction is the ______ of an electron; oxidation is the ______ of an e…
C. gain, loss
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isotopes - problems given the information below, calculate the average …
$55.84$
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the chemical formula for calcium hydroxide is: ca(oh)2. calculate the m…
74.10 g/mol
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ph measures the acidity of a substance, and is described by the equatio…
$7.3$
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general knowledge matching match each of the items in the left column t…
1. F. A substance whose chemical action can damage body structures or impair body functions 2. H. Misuse of any substance to produce a desired effect 3. G. A substance that will c…
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decide whether these proposed lewis structures are reasonable. proposed…
1. No, it has the wrong number of valence electrons. The correct number is: 16 2. No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols …
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what is the missing coefficient to make a balanced equation? 2na + ?cl₂…
The coefficient of $Cl_2$ is 1 and the coefficient of $NaCl$ is 2.
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what is the missing coefficient to make a balanced equation? ? na + cl₂…
2
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hydrochloric acid and magnesium were placed in a flask. a stopper with …
D. Measure the temperature of the mixture
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decide whether these proposed lewis structures are reasonable. proposed…
1. No, it has the wrong number of valence electrons. The correct number is: 8 2. No, it has the wrong number of valence electrons. The correct number is: 14 3. Yes.
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in the united states, the onset of puberty has been occurring earlier a…
- exposure to pollutants - exposure to phthalates - unhealthy weight gain - disruptions to the endocrine system
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homogenous heterogenous soda lucky charms gatorade blood chex mix
Soda: homogenous Lucky Charms: heterogenous Gatorade: homogenous Blood: heterogenous Chex Mix: heterogenous
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when you strike a match, the friction generates heat that converts a sm…
2.89
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1. how is the modern periodic table arranged? 2. when the periodic tabl…
1. Elements are arranged in order of increasing atomic number, with elements of similar chemical properties in groups and elements with the same number of electron - shells in per…
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historically, utensils like forks and spoons were often made from silve…
0.301
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which crime is essentially a theft in violation of trust? select one: a…
1. D. Embezzlement 2. D. All of the above
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aluminum hydroxide (al(oh)₃) is an active ingredient in antacids, which…
0.199
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4. match the terms: a. reactant b. product c. precipitate ● ___ substan…
- Substance that goes into a reaction: A. Reactant - Substance that forms in a reaction: B. Product - Solid that forms from two liquids: C. Precipitate
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silicon (si) is the primary component in solar panels, which convert su…
23.6
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name: madison clarke period: 4 date: oct 7 grade:11 do now — chemical c…
1. Chemical change. New substance (gas) formed. 2. The solid is called a precipitate. Formation of a new substance is evidence. 3. $4Fe + 3O_2 ightarrow 2Fe_2O_3$
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nitrosyl chloride (nocl) is a highly toxic, yellow - green gas that irr…
0.13
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the balloons at a childs birthday party are filled with helium (he). ho…
0.633
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using the periodic table, find the molar mass of trichlorofluoromethane…
$137.36$
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using the periodic table, find the molar mass of silver nitrate (agno₃)…
169.88 g/mol
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in each figure, the dashed line represents the threshold kinetic energy…
B) substance B
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7. element a has 20 protons with 2 valence electrons, while element b h…
7. Element A 8. The element with 3 protons (Lithium)
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list the following substances in order of increasing boiling points: ba…
B. $H_2<CO < HF<BaCl_2$
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using the periodic table, find the molar mass of calcium (ca). write yo…
40.08 g/mol
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using the periodic table, find the molar mass of manganese (mn). write …
54.94 g/mol
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complete the blanks by answering the blanks for the indicated atoms in …
Molecular geometry of Carbon indicated by "a": Tetrahedral Bond angle around Carbon indicated by "a": 109.5° Hybridization at a of Carbon indicated by "a": $sp^{3}$ Molecular geom…
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which of the following is a compound - complex sentence? while at schoo…
After we get done with school, I have to go to work, but Luther has to go to practice.
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efavirenz (sold as sustiva™) is an anti - retroviral medication prescri…
For carbon marked with '*': Bond angle: 120°, Hybridization: $sp^{2}$, Electron geometry: trigonal planar For carbon marked with '@': Bond angle: 109.5°, Hybridization: $sp^{3}$, …
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using the periodic table, find the molar mass of oxygen gas (o₂). write…
32.00 g/mol
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7. parent - child relationship - how does coles relationship with his m…
7. The relationship may change based on movie events; trust is key to the emotional bond. 8. Dr. Crowe may face dilemmas like confidentiality and informed consent. 9. The twist sh…
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across: 1. when a solution has more solute than it can hold. 3. when a …
1. Saturated 2. Insoluble 3. Suspension 4. Saturation 5. Tyndall; Dissolved 6. Alloy; Colloid 7. Solute; Solvent
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question 18 of 23 > the rate of a certain reaction was studied at vario…
$E_a = 138.3\ kJ/mol$ $A = 1.2\times10^{16}\ s^{-1}$