Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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gizmo warm - up just like in a tug - of - war, atoms that are bonded to…
1. The sodium atom loses its valence electron to the chlorine atom. 2. Chlorine atom. Because chlorine is more electronegative. 3. Sodium becomes a lighter - colored cation, chlor…
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elements and the periodic table workbook this workbook contains a varie…
1. Hydrogen, H; Oxygen, O 2. Beryllium, Be; Calcium, Ca 3. Aluminum, Al; Barium, Ba 4. Iron, Fe; Silver, Ag
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student exploration: polarity and intermolecular forces vocabulary: dip…
1. The bully 2. The ball will stay in place.
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17. chromium is an example of an element that is a _. a. nonmetal b. tr…
17. b. Transition metal 18. a. The elements in each group have similar chemical properties 19. d. Strontium 20. b. Helium 21. c. Germanium 22. a. Br 23. c. Sn 24. (No options prov…
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13. calculate solve each of the following. a. if 22.99 g of sodium and …
$58.44\ g$ ### 13b
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b. cerebellum: c. pituitary gland: 10. explain the role of neurotransmi…
10. Neurotransmitters are chemical messengers that cross the synaptic cleft to bind to receptors on neighboring neurons, exciting or inhibiting their activity for neuron - to - ne…
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20 40.078 ca calcium a. atomic mass b. atomic number c. the number avai…
12. c. Al 13. b. Na 14. a. Calcium 15. d. Lead 16. b. An alkaline metal
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multiple - choice question what does it mean when we say that a molecul…
The molecule has an unequal sharing of electrons among atoms.
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which website citations are formatted correctly? select three options. …
B. Greene, Tom. Home Composting. Hanover Growers Guild, 15 March 2010. Web. 22 April 2011. C. Schultz, Renee. Monitoring Seed Germination. Chesterfield County Agricultural Extensi…
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6. who discovered the first subatomic particle? a. democritus. the atom…
6. c. Thomson. The electron 7. a. Electron cloud 8. c. Identity 9. d. Nucleus 10. b. Stability
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1.what element is shown in this bohr model? a. helium b. argon c. sulfu…
1. B. Argon 2. A. 3 3. C. 8 4. A. Selenium 5. C. Atomic number
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1.what element is shown in this bohr model? a. helium b. argon c. sulfu…
B. Argon
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11. describe the results of a physical change and list three examples o…
Results: Change in form or state without chemical composition change. Examples: Melting ice, tearing paper, cutting wood ### 12.
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question 3 1 pts the chemical messengers that are manufactured by a neu…
B. neurotransmitters
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post - lab for build an atom 1. you build an atom that has the followin…
# Explicación: ## Paso 1: Identificar el elemento El número de protones define el elemento. Con 3 protones, el elemento es litio (Li). ## Paso 2: Calcular la masa atómica La masa …
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10. classify each change as physical or chemical. a. crushing an alumin…
a. Physical change b. Physical change c. Chemical change
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1. the world energy consumption is shown in the chart below. categorize…
1. Wind power: KE Solar power: KE Nuclear: PE Natural Gas: PE Coal: PE 2. Initially gravitational potential energy, then kinetic energy during the fall, and upon hitting the groun…
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5. phenolphthalein will turn a solution pink if the solution contains a…
| Substance | Acid, Base, or Neutral? | Color after adding phenolphthalein | |--|--|--| | Soda | Acidic | Colorless | | Water | Neutral | Colorless | | Bleach | Alkaline | Pink | …
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instructions read and answer the following questions. (a) define the te…
23.3 amu
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started: oct 6 at 9:51am quiz instructions 1. read each question and an…
D. The amount of space that an object occupies, measured in liters or centimeters cubed. mL
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question 4 which answer choice gives the best description of mass and g…
The amount of matter in an object.
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2.1 evaluate quiz: introduction to matter (sc.8.p.8) quiz instructions …
Liquid B
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name: q1 chemistry: u2l6 isotope & ions review 2. use the data table be…
a. To create the mass spectrum: On the x - axis is the mass number and on the y - axis is the percent abundance. Plot peaks at approximately 69.92 amu with 20.84% abundance, 71.92…
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ariel has an object made of pure zinc with a mass of 2.6 grams. what is…
D. $0.4\text{cm}^3$
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22. create a graphic organizer using the terms bohr model, energy suble…
One possible graphic organizer structure: - **Models**: - Bohr model - Quantum - mechanical model - **Bohr model**: Orbit - **Quantum - mechanical model**: - Principal energy leve…
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instructions: in each question, identify the element with the greatest …
# Explicación paso a paso: ## Paso 1: Identificar los elementos en la tabla periódica Buscar la masa atómica de cada elemento en la tabla periódica. ## Paso 2: Ordenar los element…
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name: teacher: date: q1 chemistry: u2l10 periodic table practice prepwo…
1. $1s^{2}2s^{2}$ 2. Magnesium
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completion complete each statement on the line provided. 1. a(an) _____…
1. solid 2. volumes 3. solid 4. kinetic 5. collisions 6. increases; temperature 7. volume; temperature 8. Kelvin 9. atmospheric 10. exothermic 1. Solids have a definite shape and …
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7. the law that states that the volume of a gas is directly proportiona…
7. d. Charles's law. 8. c. 200 kilopascals. 9. d. both a and b 10. c. stays the same. 11. b. freezing 12. d. vaporization. 13. b. melting. 14. b. vaporization
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periodic table scavenger hunt! prework part 1: periodic table practice …
1. Gold (Au) 2. Magnesium (Mg) 3. Argon (Ar) 4. Lithium (Li) 5. Mercury (Hg), Bromine (Br) 6. Silicon (Si) 7. # of protons: 49, # of electrons: 52 8. Hydrogen (H) 9. Calcium (Ca) …
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1. fill in the blanks: potential energy is shown in the picture 4. in t…
3. $600\ J$ 4a. $29.4\ N$ 4b. $29.4\ J$ 4c. $88.2\ J$ 5. $24\ J$
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consider the element carbon. how many electrons can be found in a carbo…
B. 6, 4
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the difference between an atom like ca, and an ion of an atom, like ca²…
D. the number of electrons
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isotopes are two atoms that have the same ______ but different ______. …
A. mass number; atomic number
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what is the symbol for europium? o eu o eo o ep o em
A. Eu
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periodic trends - atomic mass the atomic mass describes the mass of eac…
Draw vertical arrows pointing downwards for each group and horizontal arrows pointing to the right for each period on the given periodic - table grid.
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question 2 how does humidity affect air pressure? humidity does not aff…
Humidity decreases air pressure because water vapor is less dense than dry air.
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match the bone matrix component or function with the appropriate classi…
1. Inorganic material 2. Organic material 3. Organic material 4. Collagen 5. Hydroxyapatite
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energy and matter movement through biogeochemical cycles learn how to t…
# Explicaciones breves: Las nubes son agregados de partículas de vapor de agua y hielo que se mueven con los vientos. Transportan agua en forma de vapor de agua y en algunos casos…
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energy and matter movement through biogeochemical cycles learn how to t…
# Explicaciones Breves: Las corrientes marinas y los procesos biogeoquímicos mueven los minerales y nutrientes en los océanos de la Tierra a largas distancias. Por lo tanto, la af…
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question 17 how does humidity affect air pressure? humidity increases a…
Humidity decreases air pressure because water vapor is less dense than dry air.
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4. the atomic number, or ______ number, is described as the number of _…
A. protons, protons
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1. what is the order of the periodic chart based on 2. name the alkali …
1. By atomic number. 2. Lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), francium (Fr). 3. Beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), bariu…
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part a what is the correct number of protons, neutrons, and electrons f…
Part A: B. $6p^{+},7n^{0},6e^{-}$ Part B: Neutron
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a written document describing hazards of a chemical is a: * 1 point sds…
1. A. SDS 2. B. Fire extinguisher
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the federal agency that regulates workplace safety is: * 1 point osha c…
1. A. OSHA 2. B. PPE 3. (No options provided for the third question to give a full - fledged answer. If we assume it's a multiple - choice with options not shown, the concept is r…
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question 1. hydrogen primarily exists in three distinct forms: hydrogen…
Hydrogen - 1 (protium) has 1 proton and 0 neutrons, is stable. Hydrogen - 2 (deuterium) has 1 proton and 1 neutron, is stable. Hydrogen - 3 (tritium) has 1 proton and 2 neutrons, …
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question 2. the three isotopes of oxygen are oxygen - 16, oxygen - 17, …
| Isotope | Number of Protons | Number of Electrons | Number of Neutrons | Nuclear Notation | |---|---|---|---|---| | Oxygen - 16 | 8 | 8 | 8 | $_{8}^{16}O$ | | Oxygen - 17 | 8 | …
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question 3 a mechanism in a mechanics lift failed and a 1,000 kg car fe…
A. kinetic energy
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investigation 3 experience 1: ionic bonds name a. engage: what happens …
- Reaction of explosive metal with poisonous gas: Varies by specific substances. - Reaction of pure potassium with water: $2K(s)+2H_2O(l) ightarrow 2KOH(aq) + H_2(g)$, highly exot…
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choice: write the letter of the correct choice in the blank. 5. predict…
5. b. trigonal pyramidal 6. d. angular 7. c. trigonal planar
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in a chemistry lab, the temperature of a solution, f(s), in degrees cel…
C. 22
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naming warm - ups (10/3 - 10/10) day 1 (10/3) 1. write the name for p₅n…
1. Pentaphosphorus trinitride 2. $Zn(ClO_{3})_{2}$ 3. $H_{2}Br_{6}$ 4. $N_{7}F_{5}$ 5. Strontium bromide 6. Palladium(IV) sulfate
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question 2. complete the following table by dragging and dropping the c…
| Particle | Symbol | Location | Relative Charge | Relative Mass | |--|--|--|--|--| | Electron | $e^-$ | Surrounding the nucleus | - 1 | $\frac{1}{1840}$ | | Neutron | $n$ | In th…
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question 1. use the information provided to complete the table below. n…
| Notation | Atomic Number | Mass Number | Number of Protons | Number of Electrons | Number of Neutrons | | ---- | ---- | ---- | ---- | ---- | ---- | | Helium - 4 | 2 | 4 | 2 | 2 …
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which tool was most likely used in a procedure if the lab report shows …
B. a graduated cylinder
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which of these steps would most likely be part of a lab procedure? writ…
Record the time to complete a chemical reaction
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7. consider a mixture of water, sand, and oil. how many phases are pres…
7. Number of phases: 3. Separation method: Decantation followed by filtration. 8. a. Distillation b. Filtration c. Evaporation d. Fractional distillation e. Manual sorting f. Chro…
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question 1-27 the major forms of ____________ include thermal, radiant,…
A. energy
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chapter 3 achieving mental and emotional health vocabulary practice i. …
# Breve explicación: 1. La salud mental y emocional incluye la capacidad de aceptarse a sí mismo y manejar emociones. 2. Un modelo a seguir es alguien que sirve de ejemplo para lo…
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all of the following are treatments for mental health disorders except:…
B. chemotherapy
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which statement accurately describes part of the dissolving process of …
Water molecules surround solute molecules.
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which factor influences both solubility and the rate of dissolution? pr…
B. temperature
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which statement describes heterogeneous mixtures? they are made up of t…
They are made up of two or more pure substances that are not chemically bonded together and appear non - uniform.
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brownian motion is not observed in a mixture that includes two phases. …
B. a suspension
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which of the following observations would indicate that a material is a…
It cannot be physically broken down into different types of atoms.
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a can of soda contains many ingredients, including vanilla, caffeine, s…
water
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when a strip of magnesium metal is touched to a flame, a bright light a…
because a new substance is formed
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a piece of sodium metal can be described as o a pure substance and a co…
a pure substance and an element.
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a solution contains 90 ml of methanol, 18 ml of propanol, and 2 ml of d…
A. methanol
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which of these is an example of a physical change? o sugar, when heated…
solid ice, when heated, turning into liquid water
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which statement describes a chemical property of water? it reacts with …
It reacts with sodium metal.
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which is an example of a nonaqueous solution? gasoline fog mayonnaise f…
A. gasoline
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hypothesis: if the temperature of the liquid is increased, then more su…
format: "If... then... because...", independent variable: temperature, dependent variable: solubility, reason: higher temperatures increase solubility (or lower temperatures decre…
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answer the lab question (\what is the effect of temperature on the solu…
As the temperature of the liquid increases, the solubility of the solid in the liquid will increase.
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lesson question: what is the effect of temperature on the solubility of…
format: “What is the effect of X on Y?”, materials: solid dissolved in a liquid, independent variable: temperature, dependent variable: solubility
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by the end of this lab, you will determine whether you should add cocoa…
Does the solubility of cocoa mix in water increase or decrease with an increase in water temperature?
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for each row in the table below, decide whether the pair of elements wi…
| element #1 | element #2 | compound formed? | chemical formula | | ---- | ---- | ---- | ---- | | barium | beryllium | neither | | | barium | oxygen | ionic | $BaO$ | | calcium | …
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Fe^{3+}$ | $BrO_{3}^{-}$ | $Fe(BrO_{3})_{3}$ | iron(III) bromate | | $Co^{3+}$ | $ClO_{3…
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arrange the highlighted bonds in the table below in decreasing order of…
H—F: 1 H—Br: 2 H—I: 3
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balance the chemical equation below using the smallest possible whole -…
$2NH_3(g)+3O_2(g)+2CH_4(g) ightarrow2HCN(aq)+6H_2O(l)$
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fill in the systematic names of the following chemical compounds. note:…
| molecular formula | name of compound | | ---- | ---- | | $C_3S_2$ | tricarbon disulfide | | $BP$ | boron phosphide | | $CS_2$ | carbon disulfide | | $BI_3$ | boron triiodide | |…
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down 1. most active nonmetals 2. group ii metals 3. the atomic number i…
1. Halogens 2. Alkaline earth metals 3. Protons 7. Positive 9. Number 11. Groups
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down 1. most active nonmetals 2. group ii metals 3. the atomic number i…
1. Halogens 2. Alkaline earth metals 3. Protons 7. Positive (cation) 9. Number 11. Groups
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6. what is similar about the valence shell in the halogens family?
All elements in the halogen family have 7 valence electrons.
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question 6 if q = k the reaction is at equilibrium the reaction will go…
1. The reaction is at equilibrium 2. K is based on concentrations at equilibrium, while Q is based on concentrations at any point in the reaction
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how can we figure out if a reaction is going to go forward or backward?…
For the first question: B. compare the values of Q and K For the second question: B. The reaction proceeds to the right, forming more products.
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question 1 a reaction quotient, $q_c$, can be expressed using ...... co…
1. B. ...any... 2. B. Partial pressures. 3. C. The value of Qc is variable.
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9. what distinguishes clastic sedimentary rocks from chemical sedimenta…
Clastic rocks are composed of fragments of other rocks, while chemical rocks form from mineral precipitation
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5. what is similar about the valence shell in the alkaline earth metals…
All elements in the Alkaline Earth Metals Family have 2 valence electrons in their valence shell.
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what is similar about the outer shell of electrons (valence shell) in t…
Each atom in the Alkali Metals Family has 1 electron in its valence shell.
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8. a substance is poured from one container to another, but the shape d…
8. c. Solid 9. a. Faster 10. c. Gas 11. c. The chemical composition. 12. c. There is not enough information to answer this question 13. a. Gas 14. d. Both a and c 15. c. The volum…
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6. what type of motion do particles in a liquid have? slip and slide an…
5. Particles in a liquid can slip and slide and twist past one another, vibrate slowly and float freely to fill a container. 7. Particles in a gas can slip and slide and twist pas…
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2. the particle theory of matter states that— all phases of matter have…
2. All phases of matter have atoms that are constantly moving. 3. The amount of mass in a given volume. 4. A substance that has mass and volume. 5. Slip and slide and twist past o…
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2. the particle theory of matter states that— all phases of matter have…
All phases of matter have atoms that are constantly moving.
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the frame rou state of matter shape: volume: particle motion: example:
Shape: Not definite Volume: Not definite Particle Motion: Fast and random Example: Oxygen
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6. in the modern periodic table, elements are arranged according to a. …
There is no option indicating increasing atomic number among the given choices. But if we were to correct the options and choose the correct one, it should be "increasing atomic n…
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what is $delta_{r}h^{circ}$ for the following chemical reaction? $h_{2}…
$21.9\ kJ/mol$
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construct the expression for kc for the following reaction. co(g) + 2 h…
$K_c=\frac{[CH_3OH]}{[CO][H_2]^2}$
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at high temperature, so₂ and no₂ react according to the equation below.…
\(K_c=\frac{[SO_3][NO]}{[SO_2][NO_2]}\)