Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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2. classify each underlined word as an element, compound, homogeneous m…
a. Compound b. Heterogeneous mixture c. Heterogeneous mixture d. Homogeneous mixture e. Compound f. Compound g. Homogeneous mixture h. Compound i. Heterogeneous mixture j. Element
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problem 3: ions are atoms that have a charge, positive or negative. thi…
1. 1 2. 0 3. + 1e
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problem 2: an atoms has 6 protons, 6 neutrons, and 6 electrons, identif…
Carbon
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consider the following equation. fe₂o₃(s) + al(s) → fe(l) + al₂o₃(s) ca…
3.985 mol
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400.0 ml of a 0.310 m solution of nacl is diluted to 900.0 ml. what is …
$0.138\ M$
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ch 10 hair brushing contraindications quiz question 2 of 5 1 point alwa…
False
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problem 1: 1 create 3 examples of stable atoms using the simulation 2 i…
1. Hydrogen - 1: Protons = 1, Neutrons = 0, Electrons = 1, Element name: Hydrogen 2. Helium - 4: Protons = 2, Neutrons = 2, Electrons = 2, Element name: Helium 3. Carbon - 12: Pro…
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acetone is used in the manufacture of many chemicals and also as a solv…
$A\approx1178.95$ kg/hr, $F\approx221.05$ kg/hr, $W = 0$ kg/hr, $B\approx186.15$ kg/hr, $D\approx34.90$ kg/hr
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what quantity in moles of k₂s will be required to completely react with…
$0.0231\ mol$
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what quantity in moles of hcl is there in 75.0 ml of 0.455 m hcl?
$0.0341\ mol$ (rounded to three significant figures)
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if 50.0 g of h₂ and 158.5 g of o₂ react, how many moles of h₂o can be p…
$9.906\ mol$
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if 69.9 g of aspirin (c₉h₈o₄) are produced from 79.8 g of c₇h₆o₃, what …
67.1%
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consider the following equation. $pb(no_3)_2(aq)+k_3po_4(aq)\to pb_3(po…
$1.35\ mol$
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what component of a chemical reaction is highlighted in red? 2h₂(g) + o…
D. reactants
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100.0 ml of a 0.500 m kbr solution is diluted to 500.0 ml. what is the …
$0.100\ M$
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question 9 4 pts identify the element symbol for the element barium. be…
C. Ba
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a student is doing research on elements that have low luster and limite…
area 4
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what component of a chemical reaction is highlighted in red? fe₂o₃(s) +…
subscripts
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which of the following elements would be the least similar to the other…
Na
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600.0 ml of a 0.490 m solution of licl is diluted to 900.0 ml. what is …
$0.327\ M$
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question 6 elements on the stair step line are unique because they have…
They have properties of both metals and nonmetals.
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what is the coefficient in front of the o₂ when the equation below is b…
7
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what quantity, in moles, of no₂ would be required to produce 4.95 mol o…
$7.425$ mol
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if 10.0 moles of o₂ are reacted with excess no in the reaction below, a…
18.5%
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which of the following reasons explains why dmitri mendeleev is credite…
He was the first to correctly predict the properties of elements that had not been discovered yet.
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which major branch of chemistry would be most concerned with researchin…
# Breve explicación: La bioquímica se centra en las reacciones químicas que ocurren en los organismos vivos, incluyendo las que tienen lugar durante la digestión de los alimentos.…
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if 10.0 moles of o₂ are reacted with excess no in the reaction below, a…
18.5%
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a student is looking for an element with 79 protons. which of the follo…
Look at the number at the top of the square called the atomic number.
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some chemists are interested in studying the rates of chemical reaction…
a. física orgánica química
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a paper clip can be bent and reshaped based on the users needs. which o…
malleability, metal
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if 0.184 moles of nacl are dissolved in a 250.0 ml solution, what is th…
$0.736$
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question 2 which pair of elements has the most similar properties? i an…
Li and Rb
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which branch of chemistry would be most concerned with measuring the el…
# Breve explicación: La química física se centra en estudiar las propiedades físicas de los materiales, incluyendo propiedades eléctricas de las soluciones. Las otras ramas mencio…
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question 1 4 pts which statement best explains how periods on the perio…
increasing atomic number from left to right
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which type of chemist would be most likely to use an instrument called …
# Breve explicación: La química analítica se centra en la identificación y cuantificación de compuestos químicos en una muestra. Un espectrofotómetro es una herramienta común en l…
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enzymes are large molecules that help chemical reactions occur more qui…
# Breve explicación: Las enzimas son moléculas biológicas importantes y el estudio de enzimas con átomos de metales (como cobre o magnesio) se asocia con la química bioinorgánica,…
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enzymes are large molecules that help chemical reactions occur more qui…
# Breve explicación: Las enzimas son moléculas biológicas y la química bioanalítica se ocupa de analizar compuestos biológicos, incluyendo enzimas. La química bioorgánica también …
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drug testing of athletes and other individuals can be accomplished with…
# Breve explicación: La prueba de drogas implica la detección y análisis de sustancias químicas en muestras biológicas como sangre y orina. La bioanálisis químico se centra en la …
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which major branch of chemistry would be most concerned with studying t…
d. orgánica
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which major branch of chemistry would be most concerned with investigat…
# Breve explicación: La química inorgánica se ocupa de los compuestos químicos que no son orgánicos, y la extracción de un metal como el níquel de rocas y sedimentos es un tema de…
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which major branch of chemistry would be most concerned with quantifyin…
# Breve explicación: La química analítica se centra en cuantificar y determinar los componentes y la composición de una muestra de materia, ya sea orgánica o inorgánica. Las otras…
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multiple - choice question how many protons and electrons does this cop…
29 protons, 29 electrons
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which branch of chemistry would be most concerned with synthesizing new…
# Breve explicación: La química orgánica se centra en los compuestos que contienen carbono. La síntesis de nuevos compuestos carbon - contenidos es un tema central en la química o…
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how many neutrons does this atom have? charge neutral mass 26 electrons…
14
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complete the sentence using one of the following words: electrochemistr…
química
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how many protons does this atom have? multiple - choice question
4
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multiple - choice question what does this model represent? a negatively…
A neutral fluorine atom
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complete the sentence using one of the following words: numbers, matter…
# Breve explicación: La química es la ciencia que estudia la materia, sus propiedades, estructura y los cambios que experimenta, incluyendo cómo los átomos se combinan para formar…
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which statement is true regarding the macroscopic and microscopic natur…
# Breve explicación: La química estudia los cambios y propiedades de las sustancias a nivel macroscópico y microscópico. Los químicos realizan observaciones a nivel macroscópico (…
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multiple - choice question what is this atoms charge, and why? 0, becau…
-1, because it has two electrons and only one proton
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which question cannot be answered by chemistry? a how could a particula…
d. ¿Por qué existe la materia?
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multiple - choice question what is this atoms mass, and why? protons ne…
2, because it has one proton and one neutron
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which statement best describes the macroscopic and microscopic nature o…
# Breve explicación: La química estudia los cambios y propiedades de las sustancias a nivel macroscópico y microscópico. Los cambios en el nivel macroscópico se deben a lo que ocu…
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multiple - choice question what is the charge of this atom? protons neu…
0
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multiple - choice question what is the mass of this atom? what is the m…
3
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nitrogen is the ____ in air. a solvent b solute c solution
a. Solvent
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name warm up sept 18th be prepared for a quiz tomorrow (sept 19th frida…
$KBr, KCl, NaCl$
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this model represents an atom of which element? protons neutrons electr…
A. Hydrogen
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seawater is an example of a ______ solution. a liquid in gas b gas in l…
c. Solid in liquid
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soda pop is an example of a ____ solution. a liquid in gas b gas in liq…
B. Gas in liquid
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which of the following examples illustrates the phrase, \like dissolves…
D. two of the above
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____ is a solute and ____ is a solvent in the atmosphere of earth. a wa…
B. Oxygen, nitrogen
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which of the following example(s) from everyday life are made possible …
A. When you have a cold, you take a pill to get relief. B. After you eat an apple, you get a boost of energy. C. You wear a synthetic spandex athletic shirt while exercising.
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5 g sodium is dissolved in 100 ml liquid ammonia. the solute(s) of the …
A. Na
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15 ml water is added to in 50 ml aqueous kcl solution. the solvent of t…
A. Water
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which of the following are considered to be part of the study of chemis…
# Breve explicación: La química es la ciencia que estudia las propiedades, la composición y los cambios de la materia. Las interacciones entre seres vivos son objeto de estudio de…
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what is a type of contaminant that can cause foodborne illness? chemica…
A. parasites
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which statement correctly describes the electrons in a water molecule? …
Electrons are pulled closer to the oxygen atom.
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20. which of the following indicates that a physical change has taken p…
- Question 20: c. fracture formation - Question 21: d. extrusion - Question 22: d. two atoms of hydrogen - Question 23: b. diamond - Question 24: d. the rock cycle - Question 25: …
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driver education final exam form a 1. a drivers license is required for…
1. C. Both I and II 2. D. revoke the driver’s license for at least 12 months 3. C. Both I and II 4. C. Both I and II 5. D. passing a stopped school bus loading and unloading child…
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because many minerals are similar in color and certain elements may cha…
11. d. foliated 12. a. fractional crystallization 13. a. plain 14. c. coarse - grained/granite 15. b. regional metamorphism 16. a. joints 17. a. chain by sharing corner oxygen ato…
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lets talk vocab...cosmetology: infection control for cos\ match the def…
43. AIDS 44. Non - porous 45. Tinea barbae 46. Centers for Disease Control and Prevention (CDC) 47. Acquired immunity 48. Disinfection 49. Tinea capitis 50. Antiseptic 51. Parasit…
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what is the term for the study of matter and the changes it undergoes. …
a. Chemistry
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for neutral atoms only, the number of protons is typically equal to the…
A. electrons
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the statement, \when vinegar and baking soda are mixed, carbon dioxide …
# Breve explicación: La reacción entre vinagre (ácido acético) y bicarbonato de sodio (sodio hidrogenocarbonato) que produce dióxido de carbono es un fenómeno químico. En química …
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what is responsible for ice floating in liquid water? a waters hydrogen…
d. all of the above
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the bonding responsible for the structure of ice is: a hydrogen bonding…
d. covalent bonding and hydrogen bonding
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fill in each blank with the most appropriate answer. the most important…
protons; nucleus; atomic number
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the structure of ice is best characterized as: a an amorphous solid wit…
c. a hexagonally - shaped, open framework of molecules
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the hydrogen bonds in liquid water are ______ because water ______. a s…
A. short - lived; is a fluid
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cp earth science unit 1 multiple choice identify the choice that best c…
1. d. metamorphism 2. b. chemical bonds 3. d. Earth’s history and our place in the universe 4. d. astronomy 5. c. clastic 6. d. well sorted 7. b. silicon and oxygen 8. a. graded b…
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metalloids have properties of metals and nonmetals and can be found on …
on the staircase
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2 ml water is added to 100 ml aqueous sodium hydroxide solution. the so…
B. Water
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delicious kool - aid is a common solution enjoyed in the summertime. wh…
D. Kool - aid mix is the solute and water is the solvent
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out of the solute and solvent of a solution, which one is present in a …
B. Solvent
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question 12 of 15 even though hydrogen is to the left of the staircase,…
B. Nonmetal
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is the material present in the smaller amount. a solute b solution c so…
A. Solute
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question 11 of 15 which family is the most stable? family 18 family 10 …
Family 18
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question 1 of 5 which statement most accurately compares epic poetry an…
A. Epic poetry tends to be long, whereas lyric poetry tends to be short.
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question 10 of 15 where are nonmetals found? to the left of the stairca…
C. To the right of the staircase
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question 9 of 15 since a non - metal is brittle, it can be easily- diss…
broken
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question 8 of 15 since metals are ductile, they can be- used to paint. …
stretched into wires
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8. use the aufbau diagram to draw the orbital notation for nickel:
1s²2s²2p⁶3s²3p⁶4s²3d⁸ (In orbital - notation form, draw arrows in boxes: 1s has one box with two arrows of opposite spin, 2s has one box with two arrows of opposite spin, 2p has t…
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since metals are malleable, they can be thrown in the air. thrown in th…
shaped
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question 6 of 15 transition metals can be found- on the moon in nature …
B. In nature
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part c: application 5. why are elements in the same group similar in ch…
5. Same number of valence electrons. 6. 7 7. Sodium (Na) is more reactive because sodium has 1 valence electron and readily donates it, while neon has a full outer - shell and is …
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question 4 of 15 what is the most reactive family? family 1 family 18 f…
Family 1
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question 3 of 15 ________ are good conductors of heat and electricity. …
A. Metals
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question 1 of 15 what are the best conductors- metals metalloids nonmet…
A. Metals
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this section describes what happens to chemical bonds during chemical r…
1. A process where reactants are transformed into products by breaking and forming chemical bonds. 2. Reactants: Starting substances in a chemical reaction. Products: Substances f…