Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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atoms with the same number of protons but different numbers of neutrons…
Isotopes
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read the text. does your shampoo leave your hair dry or damaged? flat a…
to persuade readers to buy Organi - Goo
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the number of protons plus neutrons in an atom is its number. enter the…
mass
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what is the mass number of a carbon isotope that has seven neutrons? ca…
B. 13
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what is the mass number of a carbon atom which has six protons and six …
d. 12
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unit 2 study guide: surface processes on earth 1. what role does water …
1. Water participates in chemical reactions like dissolution, oxidation, and carbonation. 2. Seeps in, dissolves minerals and causes expansion - contraction. 3. Erosion creating v…
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question 5 (1 point) when cobalt (ii) cation combines with chloride ani…
C. 2
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question 4 (1 point) what is the name of the polyatomic ion with the fo…
C. sulfite
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question 3 (1 point) using the solubility table on your handout, determ…
D. AgCl
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read the passage. the stinky durian fruit the durian is an asian fruit …
Scientists analyzed a sample taken from Thai durians to find out why the fruit has such a powerful odor.
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question 2 (1 point) two solutions are mixed in a test tube and bubbles…
A. one of the products is a gas
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myp chemistry unit 1 rehearse 1. use the following data to select two t…
6. d. $1.2\times 10^{24}$ atoms 7. c. mole 8. a. 0.0051 moles 9. c. $1.4\times 10^{24}$ atoms 10. a. iii. Amount of water b. iii. Amount of fertilizer
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what is science? * a way to create new religions any organized study of…
1. B. Any organized study of the natural world 2. B. By using reason and common sense
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types of elements what letter would be a likely place for mystery eleme…
D
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activity b: band of stability get the gizmo ready: • on the graph, make…
1. A. Stable B. Stable C. Radioactive D. Approximately 5730 years 2. A. Yes B. For light elements like hydrogen (1 proton, 1 neutron - deuterium), helium (2 protons, 2 neutrons), …
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station 2 types of elements what letter would be a likely place for mys…
B
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station 2 types of elements what letter would be a likely place for mys…
B
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types of elements what letter would be a likely place for mystery eleme…
B
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2. name each of the following molecular compounds: (a) cf₄ (b) ph₃ (c) …
2. (a) Carbon tetrafluoride (b) Phosphine (c) Tetraphosphorus decoxide (d) Phosphorus trichloride (e) Dinitrogen tetrafluoride (f) Dioxygen difluoride 3. (a) Molecular, diphosphor…
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color theory color: an element of art that is derived from reflected li…
Primary Colors: Red - color the first box red, Blue - color the second box blue, Yellow - color the third box yellow Secondary Colors: Green - color the first box green, Orange - …
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calculate the average atomic mass of carbon if 98.90% of the atoms are …
$12.01$
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question 12 (1 point) why is water able to form hydrogen bonds with oth…
B. Water is polar
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question 8 (1 point) water doesnt water mix with oil? a oil is polar b …
c. Oil is hydrophobic
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question 7 (1 point) which property helps salt dissolve in water? a hig…
b. Universal solvent
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practice: balancing equations #2 show all work on a separate sheet of p…
13. $1Mn + 2HI ightarrow1H_2 + 1MnI_2$ 14. $C_6H_{12}O_6+6O_2 ightarrow6CO_2 + 6H_2O$ 15. $Cu + 2AgNO_3 ightarrow2Ag+Cu(NO_3)_2$
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use the periodic table to determine which of the following could be an …
B. $Z = 35,A = 79$ C. $A = 79,N = 44$
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practice: predicting products of chemical reactions use your knowledge …
1. $4Na + O_2 ightarrow2Na_2O$ 2. $Mg + F_2 ightarrow MgF_2$ 3. $2Na+Cl_2 ightarrow2NaCl$ 4. $2Al + 3S ightarrow Al_2S_3$ 5. $3Ca + 2P ightarrow Ca_3P_2$ 6. $2HgO ightarrow2Hg + O…
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9) a) is the following molecule polar or non - polar? explain your answ…
a) Polar. Due to electronegativity difference and non - canceling bond dipoles. b) 1 atom of $Mg$; 2 atoms of $Cl$
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iclicker: predict the sign of δs_system 2n₂o(g) → 2n₂(g) + o₂(g) a) ent…
B. Entropy increases, $\Delta S$ is positive
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1 ccc patterns what patterns did you observe in the development of the …
Patterns include discovery of elements over time and recognition of trends. Timeline is related to scientific advancements enabling element - discovery and table refinement.
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4 - careers in art history learning objective: identify the careers tha…
b. Art appraiser
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practice: balancing and classifying show all work for balancing on a se…
1. 2, 6, 6, 2; single - replacement 2. 1, 1, 1, 1; double - replacement 3. 1, 6, 4; synthesis 4. 2, 1, 2, 1; single - replacement 5. 1, 2, 2, 1; double - replacement 6. 2, 3, 3, 1…
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question 20 2 points the axiology of chemistry and physics see values a…
B. something to be kept out of research
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cs: alkali metal alkaline earth metal done
alkali metal
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ch of the elements below as an alkali metal or an alkaline earth metal.…
alkaline earth metal
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ca: alkali metal alkaline earth metal done
alkaline earth metal
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use the periodic table to identify each of the elements below as an alk…
alkali metal
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question 7 2 points we rely on mental structures called schemas to ____…
B. organize and interpret information
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marla sometimes stays after school to tutor classmates. if it is tuesda…
B. No conclusion can be drawn. Today could be Thursday and Marla could have arrived home at 4 p.m. due to softball practice.
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sulfate ion so₄²⁻ will have which of the following? (hint: you will hav…
1) Tetrahedral for both electron and molecular geometries
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question 9 (1 point) which of the following will have resonance structu…
1) Molecule with more than one correct Lewis structure
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malik analyzed three samples to test which element was a metalloid. the…
C
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question / (1 point) listen which of the following is influenced by the…
4) All of the above
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which of the following will have a bent molecular geometry (not electro…
4) All of the above
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question 5 (1 point) listen when a metal atom transfers one or more ele…
2) Ionic
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which of the following can form covalent bond with equal sharing of ele…
2) $Cl_2$
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which of the following will have a double bond between c and c, and wil…
2) $C_2H_4$
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the position of metalloids on the periodic table is generally found alo…
The first blank: metals; The second blank: metallic
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use the periodic table to identify each of the elements below as an alk…
alkali metal
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question 4 (1 point) listen which of the following has been stated corr…
3. Br⁻ ion will have the electronic configuration of Ar
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which of the following can form covalent bond with equal sharing of ele…
2) $Cl_2$
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a ball is dropped in a closed system (no air resistance). what happens …
Potential energy changes into kinetic energy, and no energy is lost.
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electrons in the ______ energy level are involved in making bonds and c…
highest
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which of these elements are you least likely to find in nature as a pur…
sodium (Na)
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what happens to a catalyst after a chemical reaction is completed? a. i…
B. It remains unchanged and can be reused.
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what branch of chemistry studies the rates of chemical reactions and th…
C. Chemical Kinetics
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use the periodic table to identify the name or atomic number for each e…
hafnium: 72 phosphorus: 15 rhodium: 45 osmium: 76 magnesium: 12
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what is the role of a catalyst in a chemical reaction? a. it increases …
C. It lowers the activation energy.
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in a chemical reaction, what role does a catalyst play? a. consumes all…
B. Decreases activation energy
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use the periodic table to identify the chemical symbol or name for each…
zirconium: Zr rhenium: Re As: Arsenic K: Potassium tin: Sn yttrium: Y Yb: Ytterbium
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from the list below, choose which groups are part of the periodic table…
metals, nonmetals, semimetals
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cuando una sustancia pura se puede separar es mediante el uso de selecc…
Para sustancia pura: químico Para mezclas: físico
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pregunta 4 2 puntos una mezcla en la que todas las partes se ven idénti…
Primer [Seleccionar]: Mezcla homogénea Segundo [Seleccionar]: Mezcla heterogénea
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la parte más pequeña de un elemento que tiene las propiedades de ese el…
molécula
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pregunta 5 la parte más pequeña de un elemento que tiene las propiedade…
[Seleccionar] átomo
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dos o más átomos combinados químicamente es un molécula. dos o más elem…
# Breve Explicación: La cantidad de espacio que ocupa un objeto se denomina volumen, mientras que la cantidad de materia en un objeto se llama masa. Estos son conceptos básicos en…
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dos o más átomos combinados químicamente es un molécula. dos o más elem…
elemento
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dos o más átomos combinados químicamente es un seleccionar. dos o más e…
1. molécula 2. compuesto 3. volumen 4. masa
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pregunta 1 3 puntos un seleccionar es una mezcla heterogénea don selecc…
[suspensión] es una mezcla heterogénea donde [partículas sólidas] se depositan en el fondo. [solución] es una mezcla homogénea.
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una propiedad de una sustancia que se puede observar sin cambiar lo que…
# Breve Explicación: Las propiedades químicas son aquellas que se presentan cuando una sustancia experimenta un cambio en su composición química. La descripción dada se ajusta a u…
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¿cuáles de estos son evidencia de que se ha producido un cambio químico…
- Primera pregunta: Cambio de color, Formación de burbujas - Segunda pregunta: Verdadero
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¿cuáles de estos son cambios químicos? el agua hierve en vapor una llav…
- ¿Cuáles de estos son cambios químicos? - una llave inglesa dejada afuera comienza a oxidarse - Un ácido corroye un metal - El almidón se convierte en azúcar cuando se digiere - …
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elija las propiedades físicas color tamaño habilidad para artimañar inf…
Para "Elija las propiedades físicas": - Color - tamaño - inflamabilidad - peso Para "¿Cuáles son los cambios físicos?": - un cubo de hielo se derrite - una ventana se rompe - una …
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16. which of these will most likely happen if an enzyme is added to a c…
The activation energy will be lowered. The rate of reaction will start to increase.
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how many protons do all atoms of carbon (c) have in the nucleus? 6 12 3
6
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atomic structurenic particles swarntom doos science particle location c…
Inside the nucleus.
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test periodic table and trends put the letter of the answer in the blan…
1. C. Arsenic, antimony, silicon 2. C. Carbon 3. C. K 4. D. In order of increasing atomic mass 5. A. Lithium and potassium 6. B. I, IV and V are true 7. A. Rb is the largest becau…
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rpcc chem 1010l: postlab - electron configuration name glorious namazue…
Element Electron Configuration: Calcium (Ca): $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}$ Strontium (Sr): $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}$ Barium (Ba): $1s^{2}…
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10. a radioisotope has a half - life of 4 days. how much of a 20 - gram…
10 g
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which of the following reactions are double replacement reactions? o na…
$\text{NaOH}+\text{HCl} ightarrow\text{HOH}+\text{NaCl}$
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which of the following reactions are single replacement reactions? ca +…
$Na + HCl ightarrow H_2 + NaCl$, $K + AgCl ightarrow Ag + KCl$
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#5 chemistry a schoology 2025 8. what is a half - life? did you write t…
The time required for the quantity of a substance (often a radioactive substance) to reduce to half of its initial amount.
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atomic subatomic particles considering all 3 subatomic particles (their…
Positive
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11. does element a or element b have a higher electronegativity? a. ele…
11. a. Element A because it is smaller and holds electrons more tightly. 12. d. phosphorus 13. c. 4 14. a. Sr, Be, Ca 15. a. A and D only 16. c. B, C and E only 17. c. - 1 18. A) …
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atomic structural particles swanson does science sub - atomic particle …
The nucleus
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11. does element a or element b have a higher electronegativity? a. ele…
11. a. Element A because it is smaller and holds electrons more tightly. 12. a. chlorine 13. c. 4 14. a. Sr, Be, Ca 15. a) A and D only 16. b) C and E only 17. c) - 1 18. A) oxyge…
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the rate law equation relates reaction rate to the concentrations of
reactants
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13. what is the correct relationship between monomers and polymers? mon…
Monomers are subunits of polymers.
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atomic structural particles swanson does science sub - atomic particle …
positive
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chemical reaction rates refer to how quickly are transformed into .
Reactants; products
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chemistry i prefix conversions hw convert the following. be sure to inc…
1. $0.972L$ 2. $49.622kg$ 3. $12.8\mu m$ 4. $0.44873km$ 5. $12.0005cm$ 6. $4.4kJ$ 7. $0.663kN$ 8. $1000dm^{3}$ 9. $0.0086m^{3}$ 10. $1.2L$ 11. $0.062m^{3}$ 12. $1.86cm$
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for each property listed, identify the type of element it describes. ve…
1. Metal 2. Metalloid 3. Non - metal 4. Metal, Non - metal, Metalloid 5. Non - metal
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what type of decay is pictured below? fusion alpha decay gamma decay fi…
Fission
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the rate law equation relates reaction rate to the concentrations of
reactants
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which elements are metalloids? check all that apply. boron tungsten alu…
boron, silicon, tellurium
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#5 chemistry a schoology 2025 half - life is the amount of mass it take…
After one half - life, 50% of the original will remain. After two half - lives, 25% of the original will remain. After three half - lives, 12.5% of the original will remain.
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test periodic table and trends put the letter of the answer in the blan…
1. C. arsenic, antimony, silicon 2. C. carbon 3. C. K 4. d. in order of increasing atomic mass 5. a. lithium and potassium 6. Analyze each statement based on periodic table knowle…
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iii. practice with equations try these. 1. $_{27}^{60}co\ ightarrow\\bo…
1. $_{28}^{60}Ni$ 2. $_{42}^{99}Mo$ 3. $_{54}^{131}Xe$ 4. $_{57}^{137}La$ 5. $_{10}^{23}Ne$ 6. $_{88}^{225}Ra$
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directions: use a periodic table to find the information asked for belo…
1. Calcium: 20, Iron: 26, Gold: 79, Uranium: 92 2. Calcium: 40, Iron: 55.8, Uranium: 238, Copper: 63.5 3. Calcium: 20, Gold: 79, Copper: 29, Iron: 26 4. Gold: 79, Iron: 26, Copper…
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4 below are several substances present in cereal. look at the diagram o…
| Substance | E, C or M? | What made you classify it this way? | |--|--|--| | Water | C | Different atoms ($H$ and $O$) are chemically combined | | Sugar (Glucose) | C | Multiple …