化学
化学反应、化学计量、分子结构与元素性质。
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multiple - choice question what is the name of al2s3? aluminum (iii) su…
B. aluminum sulfide
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which ion is always listed first? nonmetal ion negative ion anion catio…
D. cation
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3. decide if the following are an element, elemental molecule, or a com…
3. a. Compound b. Elemental molecule c. Compound d. Compound e. Element f. Elemental molecule g. Element h. Compound i. Elemental molecule j. Compound k. Elemental molecule l. Ele…
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1. identify the following examples as elemental molecules, compound mol…
Oxygen: Elemental Molecule Carbon dioxide: Compound Molecule Nitric acid: Compound Molecule Hydrochloric acid: Compound Molecule Air: Mixture Nitrogen: Elemental Molecule
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a binary compound has two different __________. compounds elements meta…
B. elements
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the mass is used to convert the given mass of a substance to moles, whi…
molar
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in the process of determining the limiting reactant, the first step is …
balance
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1. identify the following examples as elemental molecules, compound mol…
Oxygen: Elemental Molecule Carbon dioxide: Compound Molecule Nitric acid: Compound Molecule Hydrochloric acid: Compound Molecule Air: Mixture Nitrogen: Elemental Molecule
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multiple - choice question a binary compound has two different ________…
B. elements
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the ratio is used to compare the moles of each reactant in a balanced c…
mole - ratio
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name: per: which atom is which? every kind of atom has its own unique l…
(Assuming correct proton - counts as described above) 1. Boron 2. Carbon 3. Nitrogen 4. Oxygen 5. Hydrogen 6. Beryllium 7. Helium 8. Lithium 9. Fluorine
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multiple - choice question what functional group does the suffix -al re…
Aldehyde
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observations: 1. the rows (left to right) on the periodic table are cal…
1. **Similarities (Periods)**: Same number of electron shells; Decreasing metallic character. **Differences (Periods)**: Increasing atomic number; Change in chemical properties fr…
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a) the color intensity of light waves b) number of waves passing a poin…
1. B. Number of waves passing a point per second 2. D. Dark surfaces have more energy - absorbing electrons
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multiple - choice question what is the suffix for a carbocyclic acid? -…
B. -oic acid
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in the chemical equation 2h₂ + o₂ → 2h₂o, if you have 2 moles of h₂ and…
C. Neither is a limiting reactant
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multiple - choice question what do we call a six carbon chain? hexane h…
hexane
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which of the following statements is true about excess reactants? a. th…
B. They are present in greater quantities than needed to completely react with the limiting reactant
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observations 1. when the wind picks up the sediments, it can carve away…
# Explicación detallada: ## Paso 1: Analizar el primer caso Cuando el viento levanta sedimentos sueltos del suelo, es un proceso físico. No cambia la composición química de los ma…
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what role does stoichiometry play in finding the limiting reactant? a. …
A. It helps in calculating the mole ratios in the balanced chemical equation
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how do you calculate percent yield? a. by adding the actual yield to th…
C. By dividing the actual yield by the theoretical yield and multiplying by 100
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13. what type of bonding is associated with compounds that have the fol…
Ionic
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what do we have to drop from the ending of the organic name to attach t…
The -e from -ane, -ene, and -yne
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28. what happens to ocean water molecules when they become colder? a. t…
28. c. They pack together more tightly 29. c. Metamorphic rock formation 30. d. Wave height
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12. iron reacts with sulfur to form iron sulfide. if 60 grams of iron r…
30 grams
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what part of an organic molecules name do the functional groups change …
The suffix.
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11. how can you distinguish between a covalent and an ionic compound us…
A. Ionic compounds like sodium chloride don't use prefixes to indicate atom numbers
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the diagram below shows granite bedrock with cracks. water has seeped i…
A. Enlargement of the cracks occurs because water expands when it freezes. ### 4.
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6. which two types of weathering and erosion are primarily responsible …
6. A. chemical weathering and groundwater flow 7. D. physical weathering 8. D. chemical weathering of limestone 9. D. weathering 10. C. chemical weathering
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what is the first step to naming an organic compound. identify the subs…
Find the longest chain of carbons.
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19. how much does a chemical reaction rate typically increase for every…
19. b. It doubles 20. b. Freeze - thaw cycles 21. B. Decomposers
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9. what is air pressure? 10. what sphere is split into exosphere and io…
9. The force exerted by air molecules on a surface due to the weight of the air above it. 10. Thermosphere 11. Ionosphere Labeling (from top to bottom): Exosphere, Thermosphere, M…
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15. which process is responsible for the recycling of earths crust? a. …
15. c. Subduction 16. b. Aeolian weathering 17. d. It accelerates the transport of dissolved minerals 18. c. 9%
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a sealed syringe contains 0.0450 liters of carbon dioxide gas (co₂). th…
887 torr
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macromolecules color by number directions: complete each of the questio…
1. D. Organic Red 2. B. 4 Yellow 3. D. All are correct Dark brown 4. A. Functional groups Light green 5. A. Phosphate Gray 6. B. Hydroxyl Purple 7. A. Amino Black 8. D. Carboxyl L…
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macromolecules color by number directions: complete each of the questio…
1. D. Organic Red 2. B. 4 Yellow 3. D. All are correct Dark brown 4. A. Functional groups Light green 5. A. Phosphate Gray 6. B. Hydroxyl Purple 7. A. Amino Black 8. D. Carboxyl L…
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a sealed syringe contains 23.5 cubic centimeters of neon gas (ne) at a …
40.8 psi
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a sealed syringe contains 47.0 milliliters of nitrous oxide gas (n₂o) a…
249 kPa
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5. a student performs a chemical reaction in an open system and finds t…
A gas was produced and escaped from the open system, so the Law of Conservation of Matter still holds.
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3. the illustration below shows two atoms of a fictitious element, m, f…
Covalent
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a sample of carbon dioxide gas (co₂) is transferred from a cylinder wit…
$3.21\times 10^{3}$ kPa
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2. in a student - designed experiment to investigate mass conservation …
Measuring the initial and final mass of the system in a closed container, including all reactants and products.
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using the data on the periodic table provided, which of the following s…
The number of valence electrons increase going from left to right because we're adding an electron to the outer most energy level.
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multiple - choice question in this animation, what is the nacl? (sodium…
solute
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click to review the online content. then answer the question(s) below, …
Tasks an art conservator might do include assessing artworks for damage, cleaning them, and restoring them. It is important for an art conservator to know chemistry to understand …
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multiple - choice question what characteristic of water makes it a good…
It's polarity
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multiple - choice question which property of water makes it mix well wi…
Universal solvent
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if the activation energy required for a chemical reaction were reduced,…
The rate would increase.
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a dietician asks a patient about the food that the patient eats and mak…
The patient should decrease the amount of rice and pasta and increase the amount of oils in his or her diet.
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which will increase the rate of a chemical reaction? adding a catalyst …
adding a catalyst
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ch.6 worksheet #1 {50pts} fill in the missing information into the empt…
| Element | Atomic number | Mass number | Number of protons | Number of neutrons | Number of electrons | Isotopic notation | | ---- | ---- | ---- | ---- | ---- | ---- | ---- | | C…
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which statement best describes the relationship between activation ener…
Reducing the activation energy can increase the rate of a reaction.
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9. the passage discusses how plate tectonics influences the location of…
9. At convergent boundaries, subduction can form copper - gold deposits. At divergent boundaries, mid - ocean ridges form massive sulfide deposits. 10. Mantle temperature and comp…
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a device in your school lab releases gas at a rate of 0.25 liter per se…
The tiles should be arranged as $\frac{154}{4.3}$ to find the number of seconds it will take for the device to release 154 grams of the gas.
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5 a lithium atom contains 3 protons, 4 neutrons and 3 electrons. what w…
C. a beryllium ion
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the research team performs a study and concludes that foods high in fru…
Fructose has carbon, hydrogen, and oxygen atoms just like cholesterol.
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a device in your school lab releases gas at a rate of $\frac{0.25\text{…
$143.26$
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4. based on your answers to #2 and #3, propose a definition for what an…
4. Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. 6. No, because electrons have a very small mass compared to protons an…
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3. the electron dot diagram for a neutral atom of chlorine (atomic numb…
\(^{35}Cl^{1 -}\)
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match the vocabulary words with their definitions. a process by which e…
a process by which electromagnetic waves move through space - d. radiation a state of matter that is so hot that it becomes a charged form of gas - a. plasma a process that genera…
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3. the electron dot diagram for a neutral atom of chlorine (atomic numb…
\(^{35}Cl^-\) ### 4.
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1 the atomic number of lithium is 3. how many neutrons does an atom of …
1. C. 4 neutrons 2. C. 10 electrons
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what is an example of point source pollution? * chemical runoff from ro…
- Primera pregunta: C. Sewage draining into bodies of water - Segunda pregunta: D. Non - point source - Tercera pregunta: D. groundwater under the landfill
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question 3 (1 point) what is the formula of a made - up compound called…
Question 3: c. $Wx_3PO_4$ Question 4: b. $BuO$
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question 1 (1 point) why does tyler dewitt say it is important to memor…
Question 1: a, c Question 2: b Question 3: b
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makeup: flame test lab which model helped us visualize how the emission…
C. bohr model
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to rent a certain meeting room, a college charges a reservation fee of …
$t<5$
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2. draw diagrams: create an electron dot diagram for each of the elemen…
H•, :He:, Li•, :Be:, •B•, •C•, •N•, •O•, •F•, :Ne:, Na•, :Mg:, •Al•, •Si•, •P•, •S•, •Cl•, :Ar:
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bisc161: energy, chemical reactions and enzymes e. of the two lines on …
e. The line with lower activation energy represents the catalyzed reaction because catalysts lower activation energy. f. It lowers the activation energy for the formation of water…
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write out the bohr model diagrams for each of the following elements. 3…
31) For Mg in the Bohr model: First shell has 2 electrons, second shell has 8 electrons, third shell has 2 electrons. 32) For F in the Bohr model: First shell has 2 electrons, sec…
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to rent a certain meeting room, a college charges a reservation fee of …
$t\leqslant7$
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what type of matter is formed when two or more elements are chemically …
C. pure substance
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how is potential energy connected to thermal energy?
Potential energy can be converted into thermal energy through various processes like mechanical work against friction or chemical reactions.
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changing the number of neutrons of an atom changes its: element isotope…
Isotope
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the atomic number of an atom is: a. the number of electrons a. the numb…
D. the number of protons
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only certain elements produce colorful flames. every substance containi…
nitrates, oxygen, sulfur, and chlorine
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the metal element in each chemical formula appears to be responsible fo…
The metal
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makeup: flame test lab in this lab, you used substances that contained …
These elements (Cu, K, Na, Sr) are metals.
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makeup: flame test lab look at the data. predict what flame color of th…
Purple
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find the number of protons, neutrons, and electrons in the following el…
25) Pr: p = 59, n = 82, e = 59 27) B: p = 5, n = 6, e = 5 29) Te: p = 52, n = 76, e = 52 26) V: p = 23, n = 28, e = 23 28) Mn: p = 25, n = 30, e = 25 30) I: p = 53, n = 74, e = 53
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you will then determine the chemical responsible for the flame color. f…
The chemical responsible for orange flame color is $Na$ (sodium), for green is $Cu$ (copper), for purple is $K$ (potassium) and for red is $Sr$ (strontium).
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you will then determine the chemical responsible for the flame color. f…
Orange: $Na$; Green: $Cu$; Purple: $K$; Red: $Sr$
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19 of 28 06:53 / 35:00. what is the primary factor in determining an at…
neutron to proton ratio
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the flame test has been conducted and the data has been placed on the c…
1. KCl 2. Sr(NO₃)₂ 3. CuSO₄ 4. Na₂CO₃ 5. KNO₃ 6. SrCl₂ 7. NaNO₃ 8. Cu(NO₃)₂ 9. K₂SO₄ 10. CuCl₂ 11. NaCl
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experiment 4: nature of the solute - sugar dissolution observations: - …
Sugar
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experiment 4: nature of the solute - sugar dissolution observations: - …
Sugar
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32) calculate the number of moles in 150.0 grams of calcium carbonate (…
32) A. 1.499 mol 33) A. 0.5622 lb
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11. how many electrons can each sublevel hold? a. s= b. p= c. d= d. f= …
11. a. 2 b. 6 c. 10 d. 14 12. 2; opposite 13. ground 14. phosphorus (P) 15. 20 16. 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓ 3s: ↑↓ 3p: ↑↓ ↑↓ ↑↓ 4s: ↑↓ 3d: ↑↓ ↑↓ ↑↓ ↑ ↑ 17. 1s²2s²2p⁶3s² 18. [Ar]…
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1. john daltons ideas about atoms were similar to those of ____________…
Democritus
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1. in the figure above, if atoms of element a have a mass of 16 units a…
72 units
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1. which of the following parts of john daltons atomic theory were not …
atoms are indivisible
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if you compare the mass of a substance before and after a chemical chan…
The mass will stay the same.
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what is the mass of the red liquid? 60g 100g
60g
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choose the correct answer. what is the mass of the blue liquid? 100g 40g
40g
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what would be the mass of the product on the right side of the arrow? 1…
40g
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choose the correct answer. in this chemical reaction, what is the total…
40g
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choose the correct answer. why would the mass of the products of burnin…
because matter CANNOT be created nor destroyed
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experiment 2: effect of particle size - describe what happened to the c…
For Experiment 2: - Crushed tablets: Dissolved more quickly due to larger exposed surface area. - Whole tablets: Dissolved more slowly due to smaller exposed surface area. - Faste…
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practice: classification part 1: classify the following as a substance …
1. S 2. M 3. S 4. S 5. M 6. M 7. E 8. C 9. C 10. E 11. E 12. E 13. HO 14. HE 15. HE 16. HO 17. HO 18. HO 19. HO 20. HO 21. HE 22. E 23. E 24. HE 25. C 26. E 27. C 28. HE 29. C 30.…
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vegetable gardening isnt it a lot of trouble to run to the supermarket …
D. positive