化学
化学反応、化学量論、分子構造、元素の性質。
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you have learned the formation processes of each type of rock in the ro…
Igneous: molten rock cools, intrusive, extrusive Sedimentary: compaction and cementation, clastic, organic, chemical Metamorphic: heat and pressure, foliated, nonfoliated
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how do metamorphic rocks form? heat and pressure will only chemically c…
Heat and pressure chemically changes a parent rock of any type in the rock - cycle (igneous, sedimentary, or metamorphic) to form a metamorphic rock.
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multiple - choice question in the nucleus of an atom are particles call…
Protons and neutrons
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a. include and label all the major subatomic particles of the atom. b. …
a. Protons (in nucleus, + charge), neutrons (in nucleus, 0 charge), electrons (outside nucleus, - charge) b. in the nucleus c. in the nucleus d. outside the nucleus
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multiple - choice question the building blocks of all things are atoms …
A. Atoms
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match each nutrient class with its description. proteins vitamins fats …
proteins - build(s) and maintain(s) tissue vitamins - facilitate(s) normal growth and function, organic compound fats - store(s) calories for future use carbohydrates - provide(s)…
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6. apply: turn off show all and show neutron:proton ratio. predict whet…
A. Unstable; High neutron - proton ratio for a light element. B. Stable; Neutron - proton ratio of 1. C. Unstable; Odd - odd nucleus. D. Unstable; Undergoes radioactive decay (alp…
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5. analyze: if necessary, continue to save points on the graph until th…
A. The slope of the band of stability becomes steeper as the number of protons increases. B. Approximately 1.5 C. Lead - 208 ($^{208}$Pb)
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4. investigate: next to the graph, click the - button once to zoom out.…
A. Tin - 120 ($^{120}_{50}Sn$), tellurium - 128 ($^{128}_{52}Te$), xenon - 132 ($^{132}_{54}Xe$) B. No C. Approximately 1.4 - 1.5
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3. explore: investigate the different radioactive isotopes you have sav…
A. Without specific list, e.g., uranium - 238 with half - life of about 4.47 billion years (but depends on provided radioisotopes). B. The half - life tends to decrease.
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2. collect data: set protons to 1 and neutrons to 0. below the graph, c…
A. Yes B. 2 C. 1
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question: how can we predict whether an isotope will be stable or radio…
A. Stable B. Stable C. Radioactive D. Approximately 5730 years
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how much caf2 would form if 4.0 grams of ca reacts with 3.8 grams of f2…
$7.8\ g$
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how much c2h2 would form if 2.4 grams of c reacted with 0.2 gram of h2?…
2.6 g
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how much h2 is required to react with 12.7 grams of n2 to form 15.4 gra…
2.7 g
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question 8 1 pts what is the chemical name for v2o5? question 9 1 pts r…
Question 8: Vanadium(V) oxide Question 9: In2O In2O3 Question 10: Ca3P2
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how much mgbr2 would form if 1.6 grams of mg reacts with 10.5 grams of …
12.25 g
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how much o2 is required to react with 1.8 grams of be to form 5.0 grams…
3.2 g
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select the arrow that represents condensing. solid melting liquid evapo…
The blue arrow pointing from gas to liquid.
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review the third and fourth paragraphs. research institute concluded th…
The two paragraphs outline the positive effects of music on mental and physical health.
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select the arrow that represents evaporating. solid freezing liquid con…
The arrow pointing from the "liquid" circle to the "gas" circle.
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what is the chemical formula for ammonium chromate? do not use any spac…
Question 1: (NH4)2CrO4 Question 2: Hg2(ClO4)2 Question 3: calcium hydroxide
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the possible charge(s) of the pb (lead) ion is (are): +2 +1, +3, +4 +2,…
The possible charge(s) of the Pb (lead) ion is (are): +2, +4 $CrO_4^{2 - }$ is the chromate ion $ClO_4^{-}$ is the perchlorate ion $MnO_4^{-}$ is the permanganate ion $OH^{-}$ is …
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put the following compounds in order of decreasing melting point. li3p,…
1. $Ca_3N_2$ 2. $Li_3P$ 3. $MgBr_2$ 4. $LiBr$
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put the following compounds in order of decreasing expected lattice ene…
1. $AlP$ 2. $Ga_2S_3$ 3. $CaS$ 4. $CaCl_2$
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4. practice: turn off show isotope notation. use what you have learned …
| Protons | Neutrons | Mass number | Isotope notation | Symbol | | ---- | ---- | ---- | ---- | ---- | | 17 | 18 | 35 | $_{17}^{35}Cl$ | $Cl$ | | 1 | 0 | 1 | $_{1}^{1}H$ | $H$ | | …
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complete the table to determine the nuclear symbol and number of subato…
Nuclear Symbol: $^{188}_{76}Os$ Protons: 76 Neutrons: 112 Electrons: 76
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3. observe: set the protons to 8 and the neutrons to 9. a. how is the i…
A. $^{17}O$ B. The total number of protons and neutrons in the nucleus of the atom.
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6) use the image to answer the question. 10 20.1797 ne he2s²2p⁶ neon ho…
10
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which statement best explains how enzymes speed up a chemical reaction?…
Enzymes lower the activation energy of a chemical reaction.
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10. (nahco₃)₂ there are ______ atoms of sodium (na), ______ atoms of hy…
2 atoms of sodium (Na), 2 atoms of hydrogen, 2 atoms of carbon, 6 atoms of oxygen
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2. apply: turn off show isotope notation. set protons to 3 and neutrons…
$\ce{_{3}^{7}Li}$
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2. apply: turn off show isotope notation. set protons to 3 and neutrons…
2. $\ce{^{7}_{3}Li}$ 3A. $\ce{^{17}O}$ 3B. The mass - number of the isotope.
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subscripts are also used with parentheses to show how many of each atom…
8. 6 atoms of hydrogen, 3 atoms of oxygen 9. 20 atoms of carbon, 48 atoms of hydrogen, 4 atoms of oxygen
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activity a: isotope notation get the gizmo ready: set protons to 2 and …
A. 4 B. Protons
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sometimes, you might see parentheses in chemical formulas. parentheses …
6. 4 7. 12
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7. a group of kids are making fun of the new student. i should step in …
7. Opinion. Reason: It shows a personal belief about what one should do. 8. Fact. Reason: Scientifically verified chemical formula. 9. Opinion. Reason: Describes a personal prefer…
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2. set protons and neutrons to 6. a. which isotope was created? carbon …
A. Carbon 12 B. 98.93% C. Carbon 13 D. 1.07%
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subscripts are small numbers after the symbol of an element. for exampl…
2. 1 3. 3 4. 1
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2. set protons and neutrons to 6. a. which isotope was created? b. what…
A. Carbon - 12 B. 98.93% C. Carbon - 13
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which feedback mechanisms are associated with the chemical control of v…
B. Increases in blood acidity levels
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atoms in a single molecule of methane, ch4, share electrons. methane is…
covalent; five
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carbon, hydrogen, and oxygen atoms are held together by chemical bonds …
B. molecules
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nitrogen has seven protons, seven neutrons, and seven electrons. what i…
C. 14 u
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pregunta 1 de 10 ¿cuál describe la molécula a continuación? a. un amino…
# Explicación breve: La molécula mostrada es un triacilglicerol, que es un lípido. Tiene dos ácidos grasos con enlaces dobles (insaturados) y uno sin enlaces dobles (saturado). Lo…
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the subatomic particles that possess a single negative charge and surro…
D. electrons
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¿cuál muestra un monosacárido?
C.
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pregunta 1 de 10 la anhidrasa carbónica es una enzima del cuerpo humano…
# Explicación breve: Las enzimas catalizadoras, como la anhidrasa carbónica, aceleran las reacciones químicas sin consumirse en el proceso. Facilitan la formación de productos, en…
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¿qué grupo funcional se encuentra en un alcohol? a. aminado b. hidroxil…
B. Hidroxilo
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¿cuál es el nombre de la molécula que se muestra a continuación? a. eta…
D. Etilamina
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¿qué grupo funcional está dentro del compuesto que se muestra a continu…
D. Hidroxilo
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¿qué molécula es la metilamina? a. molecular structure with c, n, h b. …
# Breve Explicación: La metilamina es una amina primaria que consta de un átomo de nitrógeno enlazado a un grupo metilo ($-CH_3$) y dos átomos de hidrógeno. La estructura química …
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¿qué tipo de molécula es el pentanal? a. cetona b. aldehído do. ester d…
B. Aldehído
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¿cuáles dos grupos tienen el mismo grupo funcional? a. aldehídos y éste…
DO. Cetonas y aldehídos
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¿qué tipo de molécula se muestra a continuación? a. cetona b. aldehido …
D. Éter
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¿cuál muestra la estructura general de un éter? a. r - c(=o) - oh b. r …
B. R - O - R
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¿cómo puedes reconocer una cetona? a. tiene un grupo c=o unido a dos gr…
A. Tiene un grupo C=O unido a dos grupos R.
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¿qué grupo funcional tiene la siguiente molécula? a. aminado b. éter do…
# Explicación breve: El grupo funcional de la molécula mostrada es un éter, ya que está formada por un átomo de oxígeno enlazado a dos grupos alquilo. # Respuesta: B. Éter
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identify each of the following orbitals as p, d, or f. part 1 etextbook…
p
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the following molecule is added to water. which will happen to the wate…
C. The hydrogen ion concentration would increase and the pH would decrease
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which of the following will behave most similarly to this molecule in w…
A. A polypeptide with nonpolar R groups
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¿qué molécula es un alquino? a. 2 - etilhexano b. 2 - nonino do. trans …
B. 2 - nonino
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a. how would you describe the circled region of this molecule? acid and…
Acid and hydrophilic
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¿qué molécula es un estereoisómero del trans -2 -buteno? a. h - c≡c - c…
# Explicación breve: Los estereoisómeros son compuestos con la misma fórmula molecular y la misma conectividad, pero con una disposición diferente en el espacio. El trans - 2 - bu…
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¿cómo se llama esta molécula? a. cis -1-penteno b. 1-pentino do. 1-meti…
B. 1 - pentino
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¿qué prefijo indica una molécula con 7 átomos de carbono? a. no- b. hep…
B. Hept-
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¿qué molécula se muestra a continuación? a. 2 - etilhexano b. 3 - etilh…
C. 3 - metilhexano
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¿qué te dice el prefijo numérico en el nombre de un alqueno? a. la posi…
C. La posición del doble enlace
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¿qué indica el prefijo trans-? a. hay al menos dos enlaces dobles en la…
B. Los carbonos a cada lado del doble enlace apuntan en direcciones opuestas.
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¿qué tipo de molécula es el 2 - metilpenteno? a. alquino b. cíclico do.…
D. Alqueno ramificado
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¿cómo se llama esta molécula? a. 1 - butino b. 2 - butino do. 4 - butin…
# Breve Explicación: La nomenclatura de hidrocarburos acíclicos saturados con enlaces triples sigue la regla de nombrar el carbono en el que comienza el enlace triple. En esta mol…
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¿cómo se llama esta molécula? a. butano b. buteno do. propeneo d. propa…
A. Butano
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c3h8(g) + _o2(g) → 3 co2(g) + 4 h2o(ℓ) finally, we will balance o. how …
10
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which statement best describes the rhyme scheme of \a thought on the in…
There are two stanzas with the rhyme scheme ABAB throughout.
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which of the following sets of quantum numbers are valid (enter v) and …
Part 1: I Part 2: I
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question 30 (1 point) in this virtual lab experiment, how does the expe…
Question 30: d. Water rises higher in narrow tubes because adhesion to the glass is stronger than cohesion alone Question 31: b. It shows that hydrogen bonding gives water strong …
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an alcohol is 54.52 % c and 9.170 % h by mass. the rest is oxygen. what…
$C_2H_4O$
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9. the first step in the ostwald process for producing nitric acid is n…
B. 77%
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current attempt in progress which of the following sets of quantum numb…
I
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question 24 (1 point) how does capillary rise compare between polar and…
Question 24: a. Polar substances have a higher capillary rise Question 25: a. Due to hydrogen bonding
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question 28 use the following reaction to answer the questions below. c…
Which element was reduced: Nitrogen Which element was oxidized: Calcium Which element is the oxidizing agent: Nitrogen Which element is the reducing agent: Calcium
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question 27 which of the following is a reduction half - reaction? na -…
Question 27: \(2H^{+}+2e^{-} ightarrow H_{2}\) Question 28: Which element was reduced: Nitrogen Which element was oxidized: Calcium Which element is the oxidizing agent: Nitrogen
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what is the oxidation number of phosphorous in na3po4? +1 -5 -1 +5 ques…
For the first question: +5 For the second question: \(Sn^{2+}\longrightarrow Sn^{4+}+2e^-\)
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reduction involves the ______ of electrons. o gain o bonding o displace…
1. A. gain 2. A. 0
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question 21 oxidation involves the ______ of electrons. displacement ga…
Question 21: C. loss Question 22: B. transfer
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question 19 which are the product(s) of this chemical reaction? alcl₃ +…
Question 19: A. $\mathrm{Al(OH)}_{3}+3\mathrm{NH}_{4}\mathrm{Cl}$ Question 20: A. $\mathrm{Al(OH)}_{3}$
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question 18 1 pts which of the following is a balanced equation represe…
$2C_{3}H_{6}O ightarrow6C + 6H_{2}+O_{2}$
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question 17 1 pts if a combination reaction takes place between rubidiu…
RbBr
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question 15 1 pts what is the balanced chemical equation for the reacti…
Question 15: D. $Br_2 + 2NaI ightarrow 2NaBr + I_2$ Question 16: D. $Mg_3N_2$
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how does the force to break surface tension polar and nonpolar substanc…
C. The force is higher for polar substances
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question 1 1 pt question 2 1 pt question 3 1 pt question 4 1 pt questio…
20.1%
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20. calculate the change in internal energy ($\\delta_{r}u$), for the c…
C. $-9.19\times 10^{2}\ kJ\ mole^{-1}$
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according to durkheim, agricultural communities were very close - knit …
C. mechanical
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in this experiment, a marshmallow was placed into three different liqui…
A. The marshmallow in the soda shrank in size the most.
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question 19 (1 point) why do polar droplets show greater adhesion to th…
a. They cling to the surface due to hydrogen bonding
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a science class is doing an experiment to determine the boiling point o…
A. Group D had different result because they used a less accurate thermometer.
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five groups of students in mr. walkers science class performed an exper…
B. No, because it was not a controlled experiment.
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true or false question durkheims concept of organic solidarity is based…
True
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29. name three modern uses for quartz and explain why it is valuable in…
1. Watches: Piezoelectric property for timekeeping. 2. Glass - making: High melting point and chemical resistance. 3. Electronics: Stable physical and chemical properties for semi…
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what is a nuclide? a chemical element a proton or a neutron a type of i…
D. A nucleus with a specific number of protons and neutrons