化学
化学反応、化学量論、分子構造、元素の性質。
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water type dissolving time (s) average dissolving time (s) trial 1 tria…
The starting temperature of the water.
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ethylene glycol is used in the antifreeze you put in your car to lower …
\(606g\)
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average atomic mass & percent abundance problems name date per average …
- The average atomic mass of Gallium is \(69.72\space g/mol\) - The average atomic mass of Thallium is \(204.38\space g/mol\) - The average atomic mass of Argon is \(39.95\space a…
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match the words in the first column to the best available answer in the…
1. exciting 2. atomic motion 3. molecules 4. radar 5. magnetron tubes 6. radiation 7. radio wave signal 8. microwave energy 9. conduction
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how much ethylene glycol needs to be weighed out to make a 0.500 m solu…
\(7.76\space g\)
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match the atom to the electron configuration. chlorine, cl neon, ne sod…
- \(1s^{2}2s^{2}2p^{6}3s^{1}\) → Sodium, \(Na\) - \(1s^{2}2s^{2}2p^{6}\) → Neon, \(Ne\) - \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}\) → Chlorine, \(Cl\)
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the electron configuration for potassium (k) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹…
- Number of valence electrons: \(1\) - Shell: \(4\) - Subshell: \(s\)
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fill out the table below based on the periodic table and the electron c…
| Element | Electron Configuration | Total # of Electrons | # of Valence Electrons | | ---- | ---- | ---- | ---- | | Oxygen (O) | \(1s^{2}2s^{2}2p^{4}\) | \(8\) | \(6\) | | Phosph…
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different types of scientists may use different tools in their field of…
Collecting evidence through observation and experimentation.
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fill out the table below based on the periodic table and the electron c…
| Electron Configuration | Element | Total # of Electrons | # of Valence Electrons | | --- | --- | --- | --- | | \(1s^{2}2s^{2}2p^{6}3s^{2}\) | \(Mg\) | \(12\) | \(2\) | | \(1s^{2…
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question 1 - 1 matter is all around us, and we interact with it daily, …
All types of matter contain atoms, which are the smallest units of an element.
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iodine has an electron configuration of • ( 1 s ^ { 2 } 2 s ^ { 2 } 2 p…
Br
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iodine has an electron configuration of $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}…
Their valence electrons are in different shells
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oxygen has an electron configuration of 1s²2s²2p⁴. what other element w…
Sulfur
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match the following as either be (beryllium) or f (fluorine) valence el…
- Valence electrons = 2: Be (Beryllium) - Electron configuration is \(1s^{2}2s^{2}2p^{5}\): F (Fluorine) - Total electrons of 9: F (Fluorine) - Electron configuration is \(1s^{2}2…
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match the element/atom with its electron configuration silicon, si hydr…
Silicon, Si - \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\) Hydrogen, H - \(1s^{1}\) Boron, B - \(1s^{2}2s^{2}2p^{1}\)
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below is the electron configuration of iron. label the parts of the ele…
- Green Numbers: Electron Shell or energy level - Yellow Numbers: Number of electrons in subshell - Red Letters: Subshell - Last part (\(3d^{6}\)): Location of Valence Electrons (…
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20. the most accurate way to measure ingredients is by: * cups spoons w…
Weight
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question 11 of 20 skin creams contain chemicals associated with healthy…
A. True
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3. provide the complete set of quantum numbers for all the electrons th…
The set of quantum numbers are: $(n = 3,l = 2,m_l=-2,m_s=+\frac{1}{2})$, $(n = 3,l = 2,m_l=-2,m_s=-\frac{1}{2})$, $(n = 3,l = 2,m_l=-1,m_s=+\frac{1}{2})$, $(n = 3,l = 2,m_l=-1,m_s…
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question 3 (1 point) titanium has 22 protons and lithium has 3 protons.…
b. Lithium
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which website author is most likely to offer advice based on scientific…
D. A professor at a well - respected university
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question 1 (1 point) how many neutrons does carbon have? equation: roun…
\(6\)
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2. explain what is incorrect with respect to the following set of quant…
The value of \( l = 3 \) is incorrect. For a given \( n = 3 \), the possible values of \( l\) are \( 0,1,2\) (since \( l = 0,1,\cdots,n - 1\)).
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a chemist combines water and isopropanol to make a mixture with a volum…
26
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identify the oxidizing agent and the reducing agent for zn(s) + cu²⁺(aq…
\(Cu^{2+},Zn\)
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try it: valence electrons halogens are very reactive. these elements al…
7
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write the names for the following elements symbols. give the symbols fo…
1. Gallium 2. Nickel 3. Zirconium 4. Xenon 5. Europium 6. Astatine 7. Antimony 8. Oxygen 9. Chromium 10. Scandium 11. Mercury 12. Helium 13. Tungsten 14. Barium 15. Sulfur 16. Rub…
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identify the oxidizing agent and the reducing agent for 4li(s) + o₂(g) …
\(O_{2},Li\)
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use your knowledge of the periodic table and match the atom to what wil…
- Nitrogen (N): Will gain 3 valence electrons to have a complete octet - Aluminum (Al): Will lose 3 valence electrons to have a complete octet - Calcium (Ca): Will lose 2 valence …
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which of the following reactions are redox reactions? check all that ap…
\(4Li(s)+O_{2}(g)\to2Li_{2}O(s)\), \(Zn(s)+Cu^{2 +}(aq)\to Zn^{2 +}(aq)+Cu(s)\)
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6. how do pollutants typically affect marine food webs? a) they improve…
6. b) They accumulate in the tissues of organisms 7. a) Ocean warming 8. d) To break down dead organic matter and recycle nutrients 9. c) Overpopulation of sprat and herring 10. b…
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use your knowledge of the periodic table and match the atom to the numb…
Sodium (Na): 1 valence electron on the 3rd Energy Level; Gallium (Ga): 3 valence electrons on the 4th Energy Level; Selenium (Se): 6 valence electrons on the 4th Energy Level; Rub…
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(7:10) what key limitation did rutherfords model have? it couldnt expla…
- First question: It couldn't explain why electrons didn't collapse into the nucleus. - Second question: They orbit the nucleus in fixed energy levels.
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hi(aq) + sr(oh)₂(aq) → express your answer as a chemical equation. iden…
\(2HI(aq)+Sr(OH)_2(aq) ightarrow SrI_2(aq)+2H_2O(l)\)
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ionization energy, electron affinity, and electronegativity increase as…
True
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(5:15) what atomic model did thomson propose after discovering the elec…
- First question: The plum pudding model - Second question: Most of the atom is empty space with a dense nucleus
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atomic radius increases as you go down the periodic table and to the le…
True
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(2:50) what did john dalton contribute to atomic theory? the discovery …
- (2:50) The first scientific atomic theory based on evidence - (4:20) The electron
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(0:35) who were the first philosophers to propose that matter is made o…
(0:35) C. Leucippus and Democritus (1:25) B. He believed matter was continuous and made of earth, air, fire, and water.
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swyk: periodic trends match the key term to its definition the amount o…
- "The amount of energy required to remove an electron" matches with **Ionization Energy**. - "The ability of an atom to gain electrons" matches with **Electron Affinity**. - "The…
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h2so4(aq) + lioh(aq) → express your answer as a chemical equation. iden…
\(H_2SO_4(aq)+2LiOH(aq)\to Li_2SO_4(aq)+2H_2O(l)\)
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1. why is information about carbon critical to understanding the \molec…
1. a. it is the backbone of biological molecules required for life 2. a. carbon and hydrogen 3. d. the ability to form 4 (four) bonds producing a 3D structure 4. a. they contain b…
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fill out the table below based on the following chemical equation: n₂ +…
| Elements | Total # Before (reactants) | Total # After (Products) | |--|--|--| | \(N\) | \(4\) | \(4\) | | \(O\) | \(10\) | \(10\) | The balanced equation is \(2N_2 + 5O_2 ightar…
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2. explain what is incorrect with respect to the following set of quant…
The value of \(l = 3\) is incorrect. For \(n = 3\), \(l\) can only range from \(0\) to \(2\) (\(l=0,1,2\)).
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fill out the table below based on the following chemical equation: rb +…
The balanced equation is \(16Rb+S_8 ightarrow8Rb_2S\). - **Total # Before (reactants)**: - \(Rb\): \(16\) - \(S\): \(8\) - **Total # After (Products)**: - \(Rb\): \(16\) - \(S\): …
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hi(aq) + lioh(aq) → express your answer as a chemical equation. identif…
- For \(HI(aq)+LiOH(aq)\to\): \(HI(aq)+LiOH(aq)\to LiI(aq)+H_{2}O(l)\) - For \(H_{2}SO_{4}(aq)+LiOH(aq)\to\): \(H_{2}SO_{4}(aq)+2LiOH(aq)\to Li_{2}SO_{4}(aq)+2H_{2}O(l)\)
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2. explain what is incorrect with respect to the following set of quant…
The value of \( l = 3 \) is incorrect because for \( n = 3 \), \( l \) can only take values \( 0,1,2 \) (since \( l\leq n - 1 \)).
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h₂so₄(aq) + naoh(aq) → express your answer as a chemical equation. iden…
\(H_2SO_4(aq)+2NaOH(aq)\to Na_2SO_4(aq)+2H_2O(l)\)
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sch4u assignment structure and properties of matter 1. complete the tab…
| e- | Principle quantum number | Orbital Shape quantum numbers | Magnetic quantum number | Spin quantum number | |---|---|---|---|---| | 1 | 3 | 0 | 0 | \(+\frac{1}{2}\) | | 2 | …
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sch4u structure and properties of matter assignment 1. complete the tab…
| e- | Principle quantum number | Orbital Shape quantum numbers | Magnetic quantum number | Spin quantum number | |---|---|---|---|---| | 1 | 3 | 0 | 0 | \(+\frac{1}{2}\) | | 2 | …
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missed this? watch |we: acid-base titration; read section 5.7. you can …
\(0.2068\space M\)
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exercise 5.66 - enhanced - with expanded hints missed this? watch iwe: …
\(0.0253\space M\)
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what is the name of the group of elements labeled b in the diagram? alk…
D. Noble gases
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sch4u structure and properties of matter assignment 1. complete the tab…
| e- | Principle quantum number | Orbital Shape quantum numbers | Magnetic quantum number | Spin quantum number | |---|---|---|---|---| | 1 | 3 | 0 | 0 | \(+\frac{1}{2}\) | | 2 | …
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missed this? watch iwe: acid-base titration; read section 5.7. you can …
\(0.0253\space M\)
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what is the name of the group of elements labeled d in the diagram? alk…
D. Alkali metals
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in the periodic table, the symbol p represents the element ______ the n…
D. phosphorus, and
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question 23 of 28 which scenario is an example of the transfer of therm…
B. A microwave oven causes water molecules in a cup to vibrate faster.
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question 20 of 28 which kind of wave is generated by a plucked guitar s…
B. Longitudinal
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question 14 of 28 which list places different units of matter in the co…
D. Buildings, bricks, rock particles, atoms, protons
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question 1.a of 1 a solution was prepared in the lab where equal volume…
\(Ca_{3}(PO_{4})_{2}\)
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1. what are the main differences between acids and bases? (2 points) 2.…
1. Acids: sour taste, blue litmus red, H⁺ release. Bases: bitter taste, red litmus blue, OH⁻ release. 2. pH < 7 (acid), pH = 7 (neutral), pH > 7 (base). 3. Acids: lemon juice, vin…
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to boost the performance of oil - absorbing resins, which are used to r…
A. For both toluene and trichloromethane, the BZMA - derived resin exhibited only modestly lower absorption capacity than the resin synthesized from β - cyclodextrin but higher ab…
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carbon - 12 and carbon - 13 are isotopes of carbon. which of the follow…
They both have the same atomic number.
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question 1 of 28 the particles of a substance stay close together but s…
A. Liquid to gas
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the table below gives the atomic mass and relative abundance values for…
24.30
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a nitride ion has 7 protons, 8 neutrons, and 10 electrons. what is the …
-3
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construct the expression for ksp for solid agcn in aqueous solution. ag…
Numerator: \([Ag^{+}][CN^{-}]\), Denominator: \(1\) (since the activity of the solid \(AgCN(s)\) is \(1\) and not shown explicitly in the standard \(K_{sp}\) expression format for…
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an atom of element be has four protons, four electrons, and five neutro…
beryllium - 10
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which statement describes an electron? it has a positive charge and is …
It has a negative charge and is located in orbitals around the nucleus.
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using the information in the table to the right, calculate the average …
\(87.61\) amu
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boron has an average atomic mass of 10.81. one isotope of boron has a m…
\(11.01\) amu
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the metal featured in both the structure of the ark by apollo architect…
C. The text cites examples of a design trend and then briefly establishes the principles underlying the trend.
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7. verify that the atomic mass of magnesium is 24.31 amu, given the fol…
The calculated atomic mass of magnesium is approximately \(24.31\) amu, which verifies the given atomic mass.
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write a brief passage describing a neutral atom of nitrogen - 14 (n - 1…
- It contains seven protons in the nucleus. - It contains seven neutrons in the nucleus. - It contains seven electrons in orbitals around the nucleus. - Its atomic number is its n…
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write a brief passage describing a neutral atom of nitrogen - 14 (n - 1…
A neutral nitrogen - 14 atom has 7 protons (in the nucleus), 7 neutrons (in the nucleus), and 7 electrons (in the electron - cloud around the nucleus). The atomic number (\(Z = 7\…
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calculate the average atomic mass of carbon if 98.90% of the atoms are …
$12.01$ amu
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use the periodic table to determine which of the following could be an …
\(Z = 49,A = 113\) and \(N = 64,Z = 49\)
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protons neutrons number number (symbol) a 7 16 c d 20 56 f using the pe…
A \( 6 \) B \( 6 \) C \( C \) (already given in the symbol column for the first row, but if we follow the order of filling, for the first - row atom with \( 6 \) protons, symbol i…
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using the periodic table, complete the table to describe each atom. typ…
A: \(Ca\) (Calcium) B: \(40\) (mass number of \(Ca\)) C: \(Ca\) (Calcium) D: \(19\) (mass number of \(F\) if \(Z = 9,n = 10\)) E: \(F\) (Fluorine) F: \(K\) (Potassium) and mass nu…
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which statement is the most effective claim? organic foods are a health…
Organic foods are a healthier option than conventional foods.
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using the periodic table, complete the table to describe each atom. typ…
A: 20 B: 40 C: Ca D: 10 E: 9
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click the link here to open the atom - building interactive, and click …
1. 2 2. 1 3. 7 4. 3
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3 (a) before the spring was released during step 1, the marble was at r…
(a) B. elastic potential energy (b) C. Elastic Potential Energy
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question 4 what element is the in the list of actinoids? o a helium o b…
B. Uranium
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question 3 the vertical columns on the periodic table are called becaus…
A. groups or families
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question 1 most of the elements on the far right of the periodic table …
b. nonmetals
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name: period: general 1. simple series circuit worksheet 5 draw the sch…
2. b. positive to negative 3. b. amps 4. a. ohms 5. c. \(V = IR\) 6. True 7. True 8. False 9. \(40\space\Omega\) 10. \(3\space A\)
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port c-direction: below are listed several kinds of pollution. indicate…
1. Air Pollution 2. Water Pollution 3. Water Pollution 4. Land Pollution 5. Water Pollution
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19. water is being drained out of a swimming pool at a constant rate of…
a. The expression is \(45000 - 780h\) b. The equation is \(15000=45000 - 780h\) c. No, it will not take longer than two days. Because solving \(15000 = 45000-780h\) gives \(h=\fra…
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describe the ph scale and what it measures.
The pH scale is a measure of acidity or basicity. It ranges from 0 (most acidic) to 14 (most basic), with 7 being neutral. It measures the concentration of hydrogen ions (\(H^+\))…
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which of the following is an acid? (circle the acid(s)) a. h h h - c - …
c.
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which of the following is a carbohydrate? (circle the carbohydrate(s)) …
d. \(C_5H_{10}O_5\)
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other than using a catalyst, how can a reaction be sped up?
Increase the temperature, increase the pressure (for gaseous reactions), increase the concentration (in solutions), or increase the surface area (of solid reactants).
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explain what makes a water molecule polar.
A water molecule is polar because oxygen is more electronegative than hydrogen. It pulls shared electrons closer, creating a partial negative charge on oxygen (\(\delta-\)) and pa…
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what design attribute of water allows for so many unusual, life - suppo…
Water's polar nature (due to polar covalent bonds and resulting hydrogen bonding) gives it many life - supporting properties.
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what do all isotopes of an element have in common? what differs?
All isotopes of an element have the same number of protons (atomic number). The number of neutrons (and thus the mass number) differs.
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which is one puzzle piece for making an inference? * a. feelings b. clu…
B. Clues from the text A. Schema—what I already know A. Make an educated guess
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how many atoms (total) are in a molecule of c₃h₈o? what atoms are prese…
- Atoms present and their counts: \(3\) carbon (\(C\)) atoms, \(8\) hydrogen (\(H\)) atoms, and \(1\) oxygen (\(O\)) atom. - Total number of atoms: \(12\)