化学
化学反応、化学量論、分子構造、元素の性質。
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name the following binary (type iii) compounds a. ccl₄ b. no₂ c. if₃ d.…
a. Carbon tetrachloride b. Nitrogen dioxide c. Iodine trifluoride d. Carbon monoxide e. Dinitrogen tetroxide
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what is the role of enzymes in chemical reactions? to speed them up to …
to speed them up
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reuptake refers to the * 2 points movement of neurotransmitter molecule…
1. reabsorption of excess neurotransmitter molecules by a sending neuron 2. endorphins
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increasing excitatory signals above the threshold for neural activation…
1. B. an all - or - nothing response 2. B. reabsorption of excess neurotransmitter molecules by a sending neuron
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resting potential is to action potential as ______ is to * 2 points tem…
1. B. polarization; depolarization 2. B. an all - or - nothing response
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name the following binary (type iii) compounds: a. ccl₄ b. no₂ c. if₃ d…
a. Carbon tetrachloride b. Nitrogen dioxide c. Iodine trifluoride d. Carbon monoxide
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13. the diagram shows the electron configuration around the chlorine nu…
7, 7+
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charles knows that adding salt in water causes the freezing - point of …
D. laboratory experiment
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12. which element is most likely to have the highest ionization energy?…
Neon
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basic chemistry assignment objective: to reinforce fundamental chemistr…
- Part 1: - 1. protons, neutrons, electrons; protons, neutrons; atomic number - 2. (Example for carbon) Nucleus with 6 protons and 6 neutrons, 2 electrons in the first shell and 4…
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chemistry worksheet 2c isotopes and average atomic mass 1. northstarium…
1. Average atomic mass of Northstarium: 44.51464 2. Average atomic mass of bromine sample: 79.4 3. Average atomic mass of rubidium: 85.556 Multiple - choice 1: b. masses Multiple …
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andrea is performing an experiment in which she needs to know when a st…
D. thymol Blue
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q.4. when the following equation is balanced, what is the coefficient f…
A. 8
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q.3. if the reactants on the left side of a chemical equation are c₂h₅o…
B. $2\mathrm{CO}_{2}+3\mathrm{H}_{2}\mathrm{O}$
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10. which element has the highest electronegativity? nitrogen carbon ox…
Fluorine
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q.2. how many atoms of oxygen are represented in ba3(po4)2? a) 2 b) 4 c…
d) 8
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3) gallium has an atomic mass of 69.723 amu. the abundance of ga - 69 (…
D. 70.924 amu
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9. which element has the highest ionization energy in period 3 of the p…
Chlorine (Cl)
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extra credit optional using the venn diagram what are similarities and …
1. Similarities in Venn - diagram overlap, differences in non - overlapping parts. 2. a. Safety goggles: Protect eyes from debris, chemicals. b. Face shields: Protect entire face …
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how many energy levels are present in the above electron configuration?…
2
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what trend is observed in electronegativity as you move down group 1 in…
Decreases
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part a which of the following best explains what happens to a the rocke…
- **Part A**: B. Energy is transformed from one form to another, but the total amount stays the same. - **Part B**: - At launch: Chemical Energy - Rising through the air: Kinetic …
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6. which periodic trend refers to the energy required to remove an elec…
Ionization energy
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5. the current form of the periodic table was first developed in 1913 b…
Atomic number
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how many valence electrons does the atom contain? 1s² 2s² 2p⁴
8
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3. which of the following elements is a metalloid? argon silicon copper…
Silicon
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2. as you move from left to right across a period in the periodic table…
Increases
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what is the atomic radius trend as you move down a group in the periodi…
Atomic radius increases
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12 how does the release of large amounts of phosphorus by humans cause …
12. Excessive phosphorus causes eutrophication in water - bodies, harming aquatic life. 13. C. atmosphere 14. C. legumes 15. A. fix nitrogen artificially 16. Lightning; nitrogen -…
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directions: choose the correct word from page 18 for the following sent…
1. filling 2. antidote 3. disregard 4. registration 5. versatile 6. Large/High 7. organic 8. enjoyed/liked 9. suffocation 10. violators 11. careful 12. poor 13. present 14. managed
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multivalent ionic compounds goal - to write names and formulas of multi…
gold(I) sulfide
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period chemistry worksheet name 1. give the chemical symbol for each of…
1. a. Br; c. Hg; e. F; h. Bi; d. V; f. Ca 2. a. Ag; c. Cd; e. Sn; h. Al; d. Sb; f. As 3. a. 2; b. 2; c. 2, 3; d. 3; e. 1; f. 3 4. | Anion/Cation | $Fe^{2+}$ | $Al^{3+}$ | $Hg^{2+}…
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do enzymes speed up or slow down the rate at which a chemical reaction …
speed up
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name: worksheet classifying matter. classify each of the materials belo…
| Material | Pure Substance or Mixture | If Pure Substance, Element or Compound | If Mixture, Homogeneous or Heterogeneous | | ---- | ---- | ---- | ---- | | Aluminum (Al) | Pure S…
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assuming that all the energy given off in the reaction goes to heating …
$1200\ g$
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which of the following statements correctly relates the concentration o…
When concentration of H+ ions decrease, the pH of the solution increases. For the reaction $Cl_2 + ZnI_2 ightarrow ZnCl_2 + I_2$:
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classify the following reaction: cl₂ + zni₂ → zncl₂ + i₂. combustion sy…
single displacement
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what is the general form of a single displacement reaction for a metal …
1. A. \(A + BX ightarrow AX + B\) 2. D. \(FeO(s)+O_2(g) ightarrow Fe_2O_3(s)\)
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25.0 g of sucrose, c₁₂h₂₂o₁₁, are dissolved in water to make 250.0 ml o…
0.292
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a solution has a concentration of 0.845 m. how many mol of solute are i…
Question 3: 0.630 Question 4: O2
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balance this reaction: c3h8o + o2 --> co2 + h2o. the coefficient on o2 …
Question 1: 9 Question 2: 81.47%
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write the balanced chemical equation for the synthesis of potassium chl…
1. B. $2K + Cl_2 ightarrow2KCl$ 2. A. $A + BX ightarrow AX + B$
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the reaction of silver nitrate with zinc would be classified as a synth…
1. single displacement reaction 2. a) $FePO_4 + KNO_3$
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10 - 1 - 2025 name: arlin mendez, cll elements and compounds color - by…
1. compound green 2. glucose blue 3. element red 4. 3 yellow 5. 3 orange 6. neon purple 7. compound blue 8. 1 red 9. 4 yellow 10. element purple
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multiple choice 1 point which of the following best describes the polar…
The molecule is polar because oxygen is more electronegative and pulls electrons closer to itself.
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multiple choice 1 point what type of bond holds the hydrogen and oxygen…
B. Polar Covalent Bond
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which metal would not displace gold, au, from a compound? copper, cu po…
1. D. none of them 2. C. complete combustion 3. D. double displacement
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multiple choice 1 point pure water has a ph of 7. if you add an acid to…
pH decreases below 7
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multiple - choice questions for passage 2 16. unit operations are: a) b…
16. a) Building blocks of processes 17. b) Moves liquids through pipes 18. b) Transfer heat between fluids 19. b) Separator 20. c) Reactor
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background information: stars are mostly made of hydrogen and helium. t…
1. 1 hydrogen atom 3. Helium 5. 6; 6 7. 6 8. Carbon
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types of energy vocabulary in the table below, write an example for eac…
| Energy Type | Key Term | Example | Picture | | ---- | ---- | ---- | ---- | | Kinetic | Moving | A moving car | A simple drawing of a car with arrows indicating motion | | Gravit…
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use the following information to answer the question: which solution is…
solution 3
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10. in solids - bottling, which of these is an input? a) bottles b) syr…
10. b) The big - picture of a process 11. b) Movement of materials 12. b) They give a big - picture overview 13. b) Increased waste and lost efficiency 14. a) Equipment failure 15…
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task 2: decide if the following are examples of elements, compounds or …
Task 2: First box: This is a compound. I know this because each particle consists of two different types of atoms chemically bonded. Second box: This is an element. I know this be…
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the chemical formula for iodine pentafluoride liquid is a. if₅ b. i₅f c…
A. $IF_5$ ### 2. Second question: Identifying $HCl(aq)$
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atoms, elements, chemical bonds and enzymes 1. what is an atom made up …
1. Protons, neutrons, electrons 2. Protons: +, Electrons: -, Neutrons: neutral 3. In the nucleus 4. In electron - shells outside the nucleus 5. Number of neutrons = Atomic mass - …
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the correct formula for nitric acid is * a) hno₃(aq) b) hno₂(aq) c) nh₃…
a) a b) sodium carbonate
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nccer 22104 - 12 - basic operational techniques. which of the following…
Diesel engines often use glow plugs.
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6. new terms 1) the rings in the bohr model are called ______ or energy…
1) Electron Shells 2) Periodic Table 3) Core 4) Valence 5) a. Core electrons; b. Valence electrons 6) 1A: 1; 2A: 2; d - block: 2 (general); 3A: 3; 4A: 4; 5A: 5; 6A: 6; 7A: 7; 8A: …
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the iupac name for fe₂o₃(s) is * iron(ii) oxide iron trioxide iron oxid…
1. D. iron(III) oxide 2. C. six 3. B. double replacement
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using evidence from the passage, explain why mass balance is important.…
Mass balance is important as it upholds the law of conservation of mass. Risks of ignoring missing mass include inaccurate models and ineffective management in chemical and enviro…
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2. name the following binary ionic compounds. a. sri₂ b. li₂o c. agf d.…
a. Strontium iodide b. Lithium oxide c. Silver fluoride d. Iron(III) chloride e. Copper(II) oxide a. Copper(II) sulfate b. Magnesium hydroxide c. Sodium hydrogen carbonate d. Calc…
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consider the following balanced chemical equation: which of the followi…
1. Aluminum atoms are replacing copper ions from solution. 2. KOH + H2
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multiple choice (circle the best answer) 1. which element of art refers…
1. b) Line 2. b) Found in nature, irregular 3. c) Value 4. a) Texture 5. a) Space 6. True
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1. write the formula for the following binary ionic compounds. a. calci…
1. a. $CaCl_2$ b. $NaF$ c. $MgO$ d. $AlF_3$ e. $Al_2S_3$ f. $Li_2O$ g. $PbO_2$ h. $CuF_2$ i. $Na_3P$ j. $Li_3N$ 6. a. $BaSO_3$ b. $NH_4NO_2$ c. $Li_2SO_4$ d. $NaC_2H_3O_2$ e. $CaC…
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what is another name for the quantum model of the atom? orbital model h…
A. Orbital model
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what does the mass number represent? number of protons total number of …
Total number of nucleons
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one principle shown on a pfd is the mass balance. this means that the m…
16. A. Building blocks of processes 17. b. Moves liquids through pipes 18. b. Transfer heat between fluids 19. b. Separator 20. c. Reactor
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chlorine is added to a solution of sodium iodide, and a reaction occurs…
d. 2NaCl + I₂ the solution will have a pH that is less than 7
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9. a block flow diagram (bfd) shows: a) exact measurements and data b) …
9. b) The big picture of a process 10. c) Bottled soda 11. b) Movement of materials 12. b) They give a big - picture overview 13. b) Increased waste and lost efficiency 14. a) Equ…
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what are atoms with different neutron numbers called? isotopes ions mol…
A. Isotopes
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atoms, elements, compounds & mixtures task: rewrite the sentences if yo…
1. All matter is made of tiny particles called atoms. 2. An element is a substance made of only one type of atom. 3. Air and sea - water are mixtures, oxygen is an element. 4. Com…
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what do we call the regions where an electron is most likely to be foun…
D. Orbitals
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what is the role of neutrons in the nucleus? form chemical bonds buffer…
Buffer between protons
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which of the following is the proper electron dot diagram for nacl? a) …
1. b 2. synthesis
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what defines an atom of silver? shiny grey colour atomic mass of 108 47…
47 protons
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18. each orbital diagram shown below describes an excited state of an a…
| | A | B | C | |---|---|---|---| | Excited state electron configuration | $1s^{2}2s^{1}2p^{4}3s^{1}$ | $1s^{2}2s^{2}2p^{6}3s^{1}3p^{1}$ | $1s^{2}2s^{2}2p^{5}3p^{6}$ | | Identify …
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what subatomic particle determines the element? electrons nucleons prot…
C. Protons
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model 2 - ground state orbital diagrams and electron configurations 6. …
a. III b. I c. II d. IV e. V
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a balanced chemical equation has the same number of each type of ______…
1. B. Atoms 2. A. They share electrons. 3. b) $[Na]^+[:\ddot{Cl}:]^-$
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version a 13. which property is most commonly associated with non - met…
13. e. All of the above 14. c. they form positive ions when reacting with non - metals
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7. aluminum can be classified as a. an element b. a compound c. a mixtu…
7. a. An element 8. c. Mixture 9. b. A compound 10. a. Vinegar 11. b. Two liquids with different boiling points 12. b. filtration
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chemistry 11 - unit 2 test multiple choice. choose the most correct ans…
1. 2 2. d. Helium 3. d. The air in this room 4. e. All of these 5. c. A compound 6. c. Mixture
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1. examine the boarding - house diagrams in model 1. match each symbol …
a. III. Boarder b. I. Bunk Bed for boarders c. II. Manager's code for the number of boarders in the house and their room assignments
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some atoms of the same element have a different number of ______ in the…
Question 1: C. neutrons Question 2: C. Group 2 - actinides Question 3: Word equation: Potassium sulfate + calcium chloride → potassium chloride + calcium sulfate Balanced chemical…
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energy and matter conservation quick check how would a 3d model of gluc…
A. A 3D model shows how the different atoms are arranged, but the formula model does not.
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quiz question 4 of 5 vaping can cause chemical burns in your lungs. fal…
True, vaping injury like chemical burns have been reported by doctors.
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when bases dissolve in water they release hydroxide ions. true false a …
1. True 2. False 3. False 4. True
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acids are characterized by a bitter taste. * true false bases have a ph…
1. B. False 2. B. False 3. B. False 4. A. True
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choose the correct spelling of the word that best completes the sentenc…
B. innocuous
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a molecule is composed of two or more atoms joined together by ionic bo…
1. B. False 2. A. True 3. B. False 4. B. False 5. B. False
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15. which one of the following compounds is insoluble in water? a) pb(c…
E. $Hg_2Cl_2$
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what happens to the surroundings in an exothermic reaction? a. they gai…
A. They gain heat from the reaction
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what does an energy diagram for an exothermic reaction, typically look …
B. The products have lower energy than the reactants.
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which of the following best describes the enthalpy change in an endothe…
A. Positive, indicating energy is absorbed
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which of the following is a characteristic of exothermic reactions? a. …
B. They release energy to the surroundings
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true or false: scientists know the exact location of electrons in an at…
B. False; scientists use probability to determine the most probable location of an electron.
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true or false: scientists know the exact location of electrons in an at…
False; scientists use probability to determine the most probable location of an electron.
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select the correct answer. in a given chemical reaction, the energy of …
A. Energy is absorbed in the reaction
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match the chemical reactions with their properties. neutralization comb…
1. The reaction has at least two reactants and one product. $\to$ synthesis 2. The reaction has one reactant and at least two products. $\to$ decomposition 3. Oxygen is one of the…