化学
化学反应、化学计量、分子结构与元素性质。
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select the correct answer. melissa is taking an entrance exam that is t…
B. SAT - II
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drag the tiles to the correct boxes to complete the pairs. match the sc…
Megan's scenario → financial need Kunal's scenario → entrance counseling Josie's scenario → FAFSA
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carbon monoxide is: only found in large cities an odorless, colorless, …
An odorless, colorless, toxic gas
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carbon monoxide is: an odorless, colorless, toxic gas a danger when dri…
# Breve explicación: El monóxido de carbono es un gas incoloro, inodoro y tóxico que se produce por la combustión incompleta de combustibles orgánicos. No es saludable respirarlo,…
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page(s) 30 - 31 2.1. evaluate a scientific claim using the process desc…
Poisonous algae are found to grow in higher abundance where greater numbers of dead fish are found. Average daily temperature increases as concentrations of methane, carbon dioxid…
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which type of region would be most likely to support chemical weatherin…
a tropical region that is hot and humid all year long
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which option best describes hydrolysis? (1 point) hydrogen in water com…
water reacting chemically with minerals in rock
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chemical weathering quick check which substance combines with iron in t…
A. oxygen
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study tip compare after you read this section, make a chart comparing t…
| Branch of Physical Science | What Scientists Study | |--|--| | Physics | Matter, energy, fundamental forces like motion, gravity, electromagnetism | | Chemistry | Composition, s…
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20 question (2 points) consider the atom whose electron - configuration…
Part 1: S Part 2: 2
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fun facts share 2-3 interesting facts about the periodic table or speci…
1. Hydrogen is the most abundant element in the universe and fuels stars. 2. Helium was first discovered in the Sun's spectrum before on Earth and is used in balloons. 3. Gold is …
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classify the following as a(n) element, compound, mixture of elements, …
Mixture of elements and compounds
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classify the following as a(n) element, compound, mixture of elements, …
Mixture of elements and compounds
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classify the following as a(n) element, compound, mixture of elements, …
Compound
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20 question (2 points) consider the atom whose electron configuration i…
S
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classify the following as a(n) element, compound, mixture of elements, …
Element
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classify the following as a(n) element, compound, mixture of elements, …
Mixture of elements
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classify the following as a(n) element, compound, mixture of elements, …
Mixture of elements and compound
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classify the following as a(n) element, compound, mixture of elements, …
Compound
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for every 1 molecule of glucose (c₆h₁₂o₆) and 6 molecules of oxygen gas…
| Type of atom | Number of atoms in 6 molecules of carbon dioxide | Number of atoms in 6 molecules of water | Total number of atoms in products | | ---- | ---- | ---- | ---- | | H…
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in cellular respiration, glucose and oxygen gas are key reactants. thes…
| Type of atom | Glucose | Oxygen | Carbon dioxide | Water | | ---- | ---- | ---- | ---- | ---- | | hydrogen (H) | √ | | | √ | | carbon (C) | √ | | √ | | | oxygen (O) | √ | √ | √ …
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during phase change d, if the substance is gaining energy the phase cha…
condensation
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question 4 4 pts during phase change d, if the substance is gaining ene…
endotérmica
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chemical models for each reactant and each product are shown below. com…
| Type of atom | Glucose | Oxygen | Carbon dioxide | Water | | ---- | ---- | ---- | ---- | ---- | | hydrogen (H) | $\checkmark$ | $\square$ | $\square$ | $\checkmark$ |
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activité : casse - tête du tableau périodique complète le tableau suiva…
| Nom de l'élément | Masse atomique | Numéro atomique | # de protons | # de neutrons (STE) | # d'électrons | | ---- | ---- | ---- | ---- | ---- | ---- | | Brome | 80 u | 35 | 35 |…
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question 10 3 pts match the phases of matter based on their bond streng…
solids - highest bond strength liquids - in the middle on bond strength gases - weakest bond strength
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choose one element to research! element name - gold symbol - atomic num…
Symbol - Au Properties - Metal. Highly malleable, ductile, good heat and electricity conductor, resistant to corrosion and oxidation. Uses - Used in jewelry - making (e.g., gold r…
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activité : elemento! 1. quel élément a 2 électrons de valence et 3 nive…
1. Magnésium 2. Fluor 7. Fer 8. Germanium
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choose the correct answer. each layer of earth has different physical a…
Composition of the layers
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drag the words into the correct boxes: a measure of the concentration o…
- a measure of the concentration of a solution: Molarity - a chemical unit or measurement, defined as 6.02 x 10^23 molecules: Moles - the mass in grams of 1 mole of a substance: M…
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drag the words into the correct boxes. a mixture of two substances, sub…
1. Solution 2. Solvent 3. Solute 4. Saturated 5. Concentration
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question 8 3 pts match the state of matter to its properties. solids ch…
solids: definite shape, definite volume liquid: indefinite shape, definite volume gases: indefinite shape, indefinite volume
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question 1 (1 point) the following category of drugs is used to relieve…
Question 1: Analgesics Question 2: all of the above Question 3: True Question 4: Gallstones
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question 7 6 pts match the phase change to its description freezing cho…
# Breve explicación: La congelación es el proceso en el que un líquido se convierte en un sólido. La condensación es cuando un gas se convierte en un líquido. La deposición es el …
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the molecules below are constitutional isomers. true false question 6 (…
Question 5: True Question 6: The structure with a cyclohexane ring having an ethyl group at the 1 - position and a methyl group at the 2 - position (the second structure among the…
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what is the structure of 2 - methylhexane? (ch3)2chch2ch2ch3 (ch3)2chch…
$(CH_3)_2CHCH_2CH_2CH_2CH_3$ ### Question 4: What is the IUPAC name of this compound?
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question 1 (10 points) what is the iupac name of this compound? 4 - iso…
## Question 1: C. 3,3 - dimethyl - 4 - propylnonane ## Question 2: D. diesel fuel (composed mostly of C₁₅H₃₂ - C₁₈H₃₈)
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when marias friend mentioned an upcoming concert, maria quickly thought…
A. semantic network
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the arcade looked nothing like how cory had imagined. it did not match …
D. schema
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a schema may be the reason that one doesnt remember items that are out …
T
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question 4 how many grams of maltulose (c₁₂h₂₂o₁₁) are in 10.5 x 10²³ m…
# Explicación: ## Paso 1: Calcular la masa molar de maltulosa La masa molar de $C_{12}H_{22}O_{11}$: $M = 12\times12 + 22\times1+11\times16$ $M = 144 + 22+176$ $M = 342\ g/mol$ ##…
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question 3 how many moles of barium sulfate, baso₄, are in 564 g of bar…
C. 2.42 mol BaSO₄
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question 2 how many grams of calcium hydroxide, ca(oh)₂, are in 5.20 mo…
385 g Ca(OH)₂
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question 5 dok 2 5 points examine this testable question: \how does tem…
As the temperature of water increased, the dissolving time of drink mixes decreased.
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question 1 how many grams of xylose (c₅h₁₀o₅) are in 5.28 x 10²³ molecu…
132 g $C_5H_{10}O_5$
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question 4 how many grams of sodium hypochlorite, naocl, are in 12.05 m…
897.0 g NaOCl
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question 3 how many grams of magnesium hydroxide, mg(oh)₂, are in 4.66 …
272 g Mg(OH)₂
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question 2 how many grams of sodium bicarbonate, nahco₃, are in 1.06 mo…
89.1 g NaHCO₃
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question 1 how many grams of calcium hydroxide, ca(oh)2, are in 5.20 mo…
# Explicación: ## Paso 1: Calcular la masa molar de Ca(OH)₂ La masa atómica de Ca es aproximadamente 40.08 g/mol, la de O es 16.00 g/mol y la de H es 1.01 g/mol. La masa molar de …
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why can some insects walk on water while humans cannot? * 5 points inse…
1. B. Surface tension from hydrogen bonding creates a resistant film strong enough for light insects 2. D. Hydrogen bonds keep water molecules farther apart in ice, making it less…
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what is polarity in the context of water molecules? * 5 points equal sh…
1. Unequal sharing of electrons between oxygen and hydrogen atoms 2. Because oxygen has more protons in its nucleus 3. Hydrogen bonds
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how do carbon dioxide, water, glucose, and oxygen differ? select all th…
The combination of atoms, the combination of bonds, the arrangement of atoms
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in a chemical process such as photosynthesis, the reactants and product…
| Chemical bonds | Carbon dioxide | Water | Glucose | Oxygen | | --- | --- | --- | --- | --- | | a carbon atom connected to another carbon atom | | | √ | | | an oxygen atom connec…
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what is adhesion? * 5 points the attraction between molecules of the sa…
1. The attraction between different types of molecules 2. Due to more surface area contact relative to volume 3. The surface must be polar or charged
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6. $\frac{7.85\times10^{24}}{6.02\times10^{23}}$
$13.04$
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why does water exhibit strong cohesive properties? * 5 points due to it…
Because of the presence of hydrogen bonds between water molecules
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what is the iupac name of this compound? 4 - isopentyinonane 3 - ethyl …
1. C. 3,3 - dimethyl - 4 - propylnonane 2. B. \((CH_3)_2CHCH_2CH_2CH_2CH_3\)
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a scientist tests how the temperature of water affects how quickly suga…
20. Temperature of water 21. Rate of sugar dissolution 22. To isolate the effect of water temperature on sugar dissolution.
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question 6 (10 points) listen what is the classification of each labele…
C1 is a secondary carbon and C2 is a tertiary carbon.
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which of the following compounds is identical to the one shown below?
The compound that is identical to the given one is the straight - chain butane structure among the options (the original structure itself as no other option matches exactly in ter…
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what is the structure of 1 - ethyl - 2 - methylcyclohexane?
The second option (the one with a cyclohexane ring having an ethyl group on one carbon and a methyl group on an adjacent carbon) is correct.
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the molecules below are constitutional isomers. ch3 - ch2 - ch - ch - c…
True
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question 13 (10 points) listen what is the iupac name of? butane hexane…
D. pentane
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which molecule is a constitutional isomer of the compound (ch₃)₂ch(ch₂)…
For the first question: More than one of the molecules is a constitutional isomer of the original molecule. For the second question: 2 - methyl - 3 - ethylhexane
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photosynthesis involves many chemical reactions. when a chemical proces…
C. water, D. carbon dioxide
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1 what are the three types of stimuli that trigger a pain response in t…
C. mechanical, thermal, and chemical
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nuclear reactions can be represented as diagrams and as equations. stud…
This is a fusion reaction because there are two smaller molecules in the reactants (left) and one larger molecule in the product (right)
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the nuclear equation also shows the transmutation of a form of radon in…
On the reactant AND the products side, the number of protons is \(2 + 84 = 86\). The number of protons and neutrons is \(215+2 + 2=219\) so the equation is balanced.
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which atomic model states that it is impossible to know the exact locat…
D. electron - cloud model
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which of the following are the types of scientific models? select all t…
A. mathematical, B. conceptual, D. physical
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look at the diagram. if the larger gray atom represents carbon and the …
Box 1: $C$ Box 2: $O_{2}$ Box 3: $CO_{2}$
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how is fission different from a simple chemical reaction? (1 point) ato…
Atoms are split into smaller pieces during fission.
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using the above table of elements and the general trend of electronegat…
1. Pb 2. W 3. As 4. Cl 5. F
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how is a simple chemical reaction different from fusion? (1 point) the …
The nuclei combine in a fusion reaction but not in a chemical reaction.
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i. nh4no3 ii. (naoh4)2co3 iii. al(no3)3 iv. coo(no3)2 v. (noh4)3po4 whi…
B. Formulas IV and V
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the chemical formula for this compound is and it is called a oh, water …
C. $H_2O$, water
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ch4 has how many of each type of atom? a 1 c and 4 h b 1 c and 1 h c 2 …
A. 1 C and 4 H
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which equation shows a chemical reaction that involves 6 atoms of carbo…
$C_6H_{12}+9O_2 ightarrow6CO_2 + 6H_2O$
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a __________ is a multilevel way of grouping items based on common prop…
B. conceptual hierarchy
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4 of 10 next 05 contains 4 oxygen atoms cuso₄ contains 2 sodium atoms n…
The matches are correct as presented in the image: - "Contains 4 oxygen atoms" with $CuSO_4$ - "Contains 2 sodium atoms" with $Na_2O$ - "Contains 12 oxygen atoms" with $Al_2(SO_4)…
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which information could a student determine from only the chemical form…
C. The number of atoms of each element in the sugar
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are three ways of organizing concepts. a. hierarchies, concepts, and ca…
D. Conceptual hierarchies, schemas, and semantic networks
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q1 chemistry: u1l3.5 locom, chemical & physical changes date: prework p…
1. D. Sugar dissolved in water 2. C. Oxygen gas 3. A. Can be separated physically and looks the same throughout 4. B. Contains visibly different substances or phases 5. C. Pure su…
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prepwork part 1: physical & chemical changes practice 1. in the diagram…
1. Without seeing the specific atom - types in the diagram, follow the general rules for circling elements, boxing compounds and starring molecules. 2. Draw $H_2$ molecules more s…
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use the equation to answer the question. $_{1}^{2}h + _{1}^{2}h ightarr…
There are two atoms with mass numbers of 2.
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source: national geographic society, anotechnology.\ published on natio…
Yes, because it fails to use quotation marks.
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question 9 of 10 which sentence is the best example of foreshadowing? a…
A. Even though he should have been studying for the chemistry test, Corey decided to go to the movies instead.
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a nurse suspects their coworker might be under the influence of a chemi…
Tell the charge nurse that the coworker might be impaired.
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fill in the blank question a molecule acting as a(n) will alter the rel…
Neurotransmitter modulator
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multiple choice question 28 of 36 concepts completed an excitatory post…
D. sodium
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jenny dissolves as much salt as she can in 100 ml of room - temperature…
A. It will force some of the salt to leave the solution because it will decrease the temperature.
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multiple choice question neurotransmitters bind to ion channels that ar…
C. chemically
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which statement primarily appeals to logos to support the position that…
While it is true that electives may not be explicitly academic, in reality, electives can still help students develop valuable skills, such as critical thinking and creativity.
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multiple choice question the water molecule shows —— because it has neg…
A. polarity
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consider these intermediate chemical equations. no(g) + o₃(g) → no₂(g) …
- 304.1kJ
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what is ph? the concentration of hydrogen ions in a solution the intens…
the concentration of hydrogen ions in a solution
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please refer to the passage to help you answer this problem. what is an…
a compound that releases hydrogen ions in a solution and has a higher concentration of H+ than OH-
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what is the charge distribution in a water molecule? both hydrogen and …
Hydrogen is positively charged, and oxygen is negatively charged.
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to the right of the arrow in the reaction below, what is oxygen (o2)? 6…
product
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2na (s) + cl₂ (g) → 2nacl (s) 2na₂o (s) → 4na (s) + o₂ (g) in the final…
multiplying the first equation by 2.