化学
化学反応、化学量論、分子構造、元素の性質。
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18 what kind of shapes are free - flowing and natural? these shapes can…
B. Organic Shapes (assuming the second option is labeled as B, with the option text "Organic Shapes")
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periodic trends: straw lab objective: to create a visual representation…
To calculate the "Calculated Straw Length (cm)" for each element, we need to determine the scale factor. Let's assume the scale factor is to convert nanometers (nm) to centimeters…
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periodic trends: straw lab aluminum al 13 0.143 silicon si 14 0.117 pho…
Since the problem involves understanding periodic trends (atomic radius, ionization energy) and performing calculations related to a lab activity on these concepts, the relevant s…
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worksheet 2: safety handling of laboratory apparatus name: ____________…
b) Safety goggles ### Question 2
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what is required to create an anion and a cation? ○ ionization energy ○…
A. ionization energy
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11. which statement of molecules of the gas is in accord with the kinet…
B. The gas particles are in constant, random motion. ### Question 13 (About kinetic theory of gases)
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what corresponds to the atomic number? ○ number of hits ○ number of pro…
B. number of protons
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9. if the temperature of 1 liter of an ideal gas is increased from 4 k …
C. Four times as great ### Question 10
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9. if the temperature of a gas is increased, which of the following des…
(Assuming the correct option is the one stating that the average kinetic energy increases with temperature, e.g., if option A is "Increase" then) A. Increase ### Question 10 (Kine…
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propane exists as a gas at standard pressure and temperature above -44°…
B. Interactions among molecules, with the exception of collisions, are negligible ### Question 2 (Pressure increase with moles)
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4 according to the kinetic molecular theory, which statement describes …
B. The motion of the gas particles is random and straight - line. ### Question 5
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maltose is a disaccharide found mostly in the seeds of wheat, oats, ric…
Maltose is a disaccharide made of the \(\boldsymbol{\text{two (molecules of)}}\) glucose. Compared to lactose and sucrose, maltose has the same number of \(\boldsymbol{\text{carbo…
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2nd attempt see periodic table see hint perform the following calculati…
\(1248\)
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carbohydrates are also known as saccharides. the word saccharide is a t…
C: 6, H: 12, O: 6 (So the chemical formula of glucose is \( \boldsymbol{\text{C}_6\text{H}_{12}\text{O}_6} \))
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using the model and a periodic table, answer the following questions. 2…
To determine the period of an element from its Bohr model (electron - shell diagram), we use the rule that the period number of an element in the periodic table is equal to the nu…
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maltose is a disaccharide found mostly in the seeds of wheat, oats, ric…
- Maltose has the same number of carbon atoms as sucrose and lactose. - Maltose, lactose, and sucrose all contain glucose. - Maltose is found in rye and barley.
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17. which of the following shows the behavior of an arrhenius acid? opt…
The option that shows the behavior of an Arrhenius acid is: $\boldsymbol{\ce{HF}}$ dissociates to produce $\ce{H+}$ and $\ce{F-}$ ions in water.
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what period does this element belong in on the periodic table? a 3 b 1 …
Assuming the element is Beryllium (Be, atomic number 4? Wait, no, the symbol "b9" might be a typo. Wait, if the element is Boron? No, Boron is B. Wait, maybe the element is Beryll…
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28 how many electrons does this element have? a 6 b 16 c 14 d 32
C. 14 (Note: In a neutral atom, the number of electrons is equal to the atomic number. If we assume the element here has an atomic number related to the context (e.g., silicon has…
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6. what is the correct name for the acid with the formula hcl? options:…
C. hydrochloric acid (assuming the third option is labeled C, with the option text "hydrochloric acid")
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how many protons does this element have? (a) 14 (b) 6 (c) 16 (d) 32
Assuming the element is Sulfur (atomic number 16) or the context implies atomic number equals proton count, the answer would be C. 16 (if the element is Sulfur, as atomic number =…
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15. fill in the blanks with the correct options. when calculating the m…
solute ### Second Blank (number of liters of the...):
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use the drop-down menus to finish marking the rhyme scheme of \an irish…
- Line 3 (Those that I fight I do not hate): a - Line 5 (My country is Kiltartan Cross): c - Line 6 (My countrymen Kiltartan's poor): d - Line 7 (No likely end could bring them lo…
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14. a carbonated soft drink loses its \fizz\ more quickly at room tempe…
the solubility of carbon dioxide gas in the drink
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______· the transfer of ______ from one place to another another sound …
Top: Wave - The transfer of energy from one place to another; Sound waves move by compressing Molecules. Bottom: Amplitude - The height of a wave. This determines loudness of a so…
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17 classify each of the following examples as a physical or chemical ch…
Boiling water to cook pasta: Physical Change (checked) The Golden Gate Bridge rusting: Chemical Change (checked) Burning a piece of steel wool: Chemical Change (checked) Sharpenin…
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complete the chart by checking off what the nucleus of an atom is compo…
Nucleus: protons (checked), neutrons (checked), electrons (unchecked) Non - nucleus: protons (unchecked), neutrons (unchecked), electrons (checked)
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research focuses on understanding the basic properties and processes ch…
The subfield is Chemistry (under Natural Science), and the research type (for the blank) is likely "Basic" (Basic research focuses on fundamental understanding).
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put the following in order of increasing standard molar entropy. questi…
\(CH_4(l)\), \(HCOOH(l)\), \(C_2H_6(l)\), \(CH_3COOH(l)\) (in order of increasing standard molar entropy)
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classify the following as either pure chemistry or applied chemistry. t…
Pure Chemistry
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exam lesson name: introduction to design technology exam number: (blurr…
B. Battery
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what type(s) of chemistry research are modern chemists actively pursuin…
c. both pure and applied research
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physical and chemical properties and changes directions: answer the fol…
### Part 1: Identify as Physical (P) or Chemical (C) Changes 1. **NaCl (Table Salt) dissolves in water** - Explanation: Dissolving salt in water is a physical change (no new subst…
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stan is researching a new insecticide that will be less toxic to birds …
b. applied chemistry
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the author to her book by anne bradstreet thou ill-formed offspring of …
complete the rhyme scheme.
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exam lesson name: introduction to design technology exam number: 700796…
A. Ozone
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describing types of chemical reactions identify the reaction type shown…
The reaction type is **decomposition reaction**. The clue is that one reactant (\( \text{NH}_4\text{NO}_3 \)) breaks down into two products (\( \text{N}_2\text{O} \) and \( 2\text…
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properties of water: 3. what is water made of? 4. what does polar mean?…
Water is made of two hydrogen atoms and one oxygen atom (per water molecule), with the chemical formula \( H_2O \). ### Question 4: What does polar mean?
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use your periodic tables atomic structure worksheet 1. the 3 particles …
s: a. Proton b. Neutron c. Electron Proton charges are: \(+\) Neutron charges are: \(0\) (neutral) Electron charges are: \(-\) ### Question 2: The number of protons in one atom of…
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extensive properties depend upon the amount of matter in the sample; in…
To solve this, we use the definitions: Extensive properties depend on the amount of matter; Intensive properties do not. ### Classifying Each Property: - **Color**: Depends on the…
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dimensional analysis problems convert the following problems. show all …
\(\boxed{244400}\) ### Problem 2:
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15. painting a piece of paper is an example of... 16. melting, vaporiza…
To solve these problems, we analyze each scenario to determine if it involves a physical property, chemical property, physical change, or chemical change: ### 15. Painting a piece…
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pacific yews were stripped of their bark so chemists could extract the …
b. cancer
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each quiz is worth 20 points. no late... no back tracking to change ans…
A neurochemical memory trace disintegrates over time
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consider the reaction cl₂(g) + br₂(g) → 2 brcl(g) at 25 °c. the entropy…
25.9 (or approximately 25.94, depending on rounding)
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12 problems remaining what do acids taste like? bitter sour
sour
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which of these do bases release in water? hydroxide ions (oh-) hydrogen…
hydroxide ions (OH-)
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consider the reaction cl₂(g) + br₂(g) → 2 brcl(g) at 25 °c. which of th…
B. There are the same moles of gas on both sides of the reaction.
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which of these do acids release in water? hydrogen ions (h+) nitrogen i…
hydrogen ions (H+)
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in a laboratory, nakisha mixes a sodium hydroxide solution with an indi…
- by comparing the given solution to other familiar solutions containing phenolphthalein - by designing an experiment to test phenolphthalein with other solutions
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are all acids and bases harmful to humans? no yes
no
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match each with the appropriate answer. ionic compound choose covalent …
- ionic compound: metal and nonmetal - covalent or molecular compound: nonmetal and nonmetal - metal: cation, loses electrons - nonmetal: anion, gains electrons
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question 1 which of these observations is qualitative rather than quant…
C. Salt deposits form from an evaporated liquid
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16 multiple choice 1 point what phase change is involved when a gas tur…
Deposition (the option labeled "Deposition" among the choices)
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11 fill in the blank 1 point the phase that has the least energy is: an…
solid
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kmt 9 multiple choice 1 point which box represents the kinetic energy i…
B
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kmt a b c previous 3 multiple choice 1 point box c represents which pha…
A. Gas
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1.9 - kmt and phases after reviewing todays material, answer the follow…
A. Liquid
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consider the reaction cl₂(g) + br₂(g) → 2 brcl(g) at 25 °c. using the i…
\(11.6\)
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learning to draw atoms name zanashah /20 pts we learned that the atom h…
2 #### b. Step1: Recall 2nd shell capacity The 2nd electron shell can hold a maximum of 8 electrons.
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rank the metals from most reactive (1) to least reactive (3) silver str…
Silver: 3 Strontium: 1 Technetium: 2
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activity wellness in your life directions: complete the sentences below…
s to the Fill - in - the - Blank Questions (1 - 6) 1. **Explanation for Question 1**: - The sentence is about accepting and managing one's limits and making the most of oneself, w…
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given $\\delta h = -46.2$ kj/mol and $\\delta s = -389.0$ j·mol⁻¹·k⁻¹, …
\( 176.0 \) (or if T is 298 K, 70.7, but based on the given 298.0 °C, it's 176.0)
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# | scrambled word | unscrambled word | definition 9 | omtsa | | 10 | n…
Unscrambled Word: Matter Definition: Anything that has mass and takes up space ### Question 10
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exam lesson name: introduction to oceanography exam number: 700793rr - …
A. between the negatively charged oxygen of one water molecule and a positively charged hydrogen of another water molecule.
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table with rows 9 to 14 (columns likely include scrambled word, unscram…
The image seems to have some text distortion. But from the word bank (Atoms, Elements, Mass, Physical change, Chemical change, Heterogeneous mixture, Matter, Pure substance, Chemi…
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periodic table search name: aida... using your colored periodic tables,…
Let's solve these periodic table questions one by one: ### Question 1: Which element is number 14 on the periodic table? - Step 1: Recall that the atomic number (the number on the…
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how many mol of na₃po₄ are in 175.0 g of na₃po₄? ○ 1.07 ○ 0.937 ○ 170. …
1.07 (corresponding to the option "1.07")
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what is the name of the $\\text{no}_3^-$ ion? nitrite nitrous nitrate n…
C. Nitrate ### Second Question (SO₃²⁻ ion):
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enter or select the correct answer for each question. you may take this…
\( 9.03 \) ### Question 2
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passage by james e. hiley 1 king midas had a greed for gold a greed he …
D. By suggesting a conflict between Midas’s greed and his love for daughter
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how many protons are in the element fluorine?
9
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what is a unique characteristic of group 18 (noble gases)? * 1 point th…
The option with "They have a full outer shell of electrons" (the second option among the four for the Group 18 question) ### Second Question (Characteristic of Alkaline Earth Meta…
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the mass of one mole of any pure substance is its
molar mass
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in group 13 (boron family), what element is classified as a metalloid? …
A. Boron ### Second Sub - Question: Which family contains elements that exist as two gases, one liquid (Br), and two solids?
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an elements is numerically equivalent to the atomic mass of the element…
molar mass
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if the atomic mass of a manganese atom is 54.94 amu, then its blank is …
molar mass
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which family of elements has exactly one valence electron and is highly…
39 ### Second Question (Element Family)
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what is the mass in grams of 1.02×10²⁴ atoms manganese (mn)? 0.169×10¹ …
\(9.30\times 10^{1}\text{ g}\) (corresponding to the option \(9.30\times 10^{1}\text{ g}\))
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what characteristic is shared by elements in groups 3-12 (transition me…
They are less reactive than Alkali Metals
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what characteristic is shared by elements in groups 3-12 (transition me…
They are less reactive than Alkali Metals ### Second Question (Chemical Symbol for Antimony)
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which of the following is not a property of metals? poor conductors met…
poor conductors
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which is a characteristic of metals? brittle insulative malleable
malleable
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aluminum is very malleable. what does this mean? it is very shiny. it c…
It can easily be pressed into sheets.
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aluminum is very malleable. what does this mean? it is very shiny it ca…
The option (assuming the last option is "It can easily be pressed into shapes"): It can easily be pressed into shapes
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platinum is a metal that has a high luster. what does this mean? it can…
It can easily be pressed into sheets
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calculate the number of atoms in 13.2 mol copper. ○ 79.5×10²³ atoms ○ 2…
\( 7.95\times10^{24} \) atoms (corresponding to the option "7.95×10²⁴ atoms")
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left: partial text and bar chart right: platinum is a metal that has a …
The correct option (assuming the first option is the one about being pulled into a wire, e.g., if the first option is labeled as A: "It can be pulled into a wire easily", then the…
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which of the following is a property shared by many metals? they are so…
They have a shiny appearance.
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determine the number of atoms in each of the following samples: 1. 62.1…
s: 1. \( \boldsymbol{7.81 \times 10^{23}} \) atoms of Ti 2. \( \boldsymbol{2.76 \times 10^{23}} \) atoms of Ne 3. \( \boldsymbol{2.55 \times 10^{24}} \) atoms of Pb
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a balloon contains ( 4.50 \times 10^{22} ) atoms of helium (he) gas. ca…
0.299 g (corresponding to the option "0.299 g")
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decide whether 15.0 g of magnesium or 15.0 g of manganese represents th…
Magnesium
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the atomic mass for boron is 10.811 g. how many molecules are in 320 g?
Approximately $1.78 \times 10^{25}$ molecules
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triglycerides form when three fatty acid molecules combine with one mol…
3
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what is the balanced oxidation half-reaction for the following unbalanc…
a. \(Ca ightarrow Ca^{2+}+2e^-\) (and b. \(Ca ightarrow Ca^{2+}+2e^-\) as they seem to be the same option, likely a typo. The correct oxidation half - reaction is \(Ca ightarrow C…
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determine the iupac name of the below organic compound. a. 5 – bromo – …
b. 1 - Bromo - 3 methyl - pent - 2 - ene
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phishing schemes fishing is an enjoyable, relaxing pastime. “phishing” …
paragraph 4
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the solubility of solids in water___: a. is independent of the temperat…
b. increases with increasing temperature
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phishing schemes fishing is an enjoyable, relaxing pastime. “phishing” …
private
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phishing schemes fishing is an enjoyable, relaxing pastime. \phishing\ …
avoid contacting untrustworthy websites