化学
化学反応、化学量論、分子構造、元素の性質。
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part b: technology-enhanced (multiple select) 7. select two statements …
A. Zombie fires can burn underground for long periods of time, C. During burning, some matter becomes gases like \(CO_2\) and water vapor ### Part C (Question 8)
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practice: identify the following as being true or false to the left of …
1. True 2. True 3. False 4. True 5. False
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which of the following best describes peat? an unnatural flammable gas …
B. an early stage of coal formation (assuming the options are labeled A, B, C, D with the second option being B; if the original labeling is different, adjust the label but keep t…
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indicates a physical change. atomic theory bohr, democritus and rutherf…
1. **Atomic theory main points**: - Democritus: Matter is made of indivisible, indestructible atoms; different atoms have different shapes and sizes. - Bohr: Electrons occupy fixe…
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23. the element located in the 4th period and in group 11 is ______.24.…
23. Copper (Cu) 24. smaller 25. metals 26. valence electrons
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20. five unknown elements that are sealed in separate glass containers …
20. a. Elements 1, 2, 3 b. halogens: Element 5; noble gases: Element 4 c. Elements 1, 2, 3 d. 1: Aluminum; 2: Magnesium; 3: Calcium; 4: Helium; 5: Chlorine 21. BOTTOM, LEFT 22. TO…
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at what temperature does liquid water turn into steam? 212 degrees fahr…
A. 212 degrees Fahrenheit
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name: lucy egrions unit 1: atomic structure remember: - the # of proton…
### 1. Identify #p, #n, #e: - $_8^{16}\text{O}$: 8 protons, 8 neutrons, 8 electrons - $_{83}^{210}\text{Bi}$: 83 protons, 127 neutrons, 83 electrons ### 2. Write the symbol: - 36p…
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metalloid (md). 1. sodium na metal 2. silicon si metalloid 3. neon ne n…
1. Sodium $\boldsymbol{Na}$ $\boldsymbol{metal}$ 2. Silicon $\boldsymbol{Si}$ $\boldsymbol{metalloid}$ 3. Neon $\boldsymbol{Ne}$ $\boldsymbol{non-metal}$ 4. Calcium $\boldsymbol{C…
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8. ethyne, c₂h₂, is used in the process of gas welding. at 500.0 k, ( k…
\( Q_{eq} \approx 74.45 \), and the system will shift to the right (toward the products) to reach equilibrium.
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name: madison beutron date: 1/2=12024 per 2 more lewis structure practi…
To solve for the Lewis structure of \( \ce{H2O} \) (Water), we follow these steps: ### Step 1: Determine the total number of valence electrons - Hydrogen (\( \ce{H} \)) has 1 vale…
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name. date. per more lewis structure practice!!! formula name before af…
To determine the Lewis structure of \( \ce{CO2} \) (Carbon Dioxide), we follow these steps: ### Step 1: Calculate the total number of valence electrons - Carbon (C) is in Group 14…
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8 how many moles are in 1.00 g of propane (c3h8)? * enter your answer 9…
\( 0.0227 \) (or rounded as needed, e.g., 0.0227 mol) ### Question 9
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6 phenyl magnesium bromide is used as a grignard reagent in organic syn…
\( C_6H_5MgBr \) ### Question 7
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4 the empirical formula for trichloroisocyanuric acid, the active ingre…
s: Question 4: \( \boldsymbol{\text{C}_3\text{N}_3\text{O}_3\text{Cl}_3} \) (or \( \text{O}_3\text{C}_3\text{N}_3\text{Cl}_3 \)) Question 5: \( \boldsymbol{\text{C}_{10}\text{H}_{…
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the empirical formula of a hydrocarbon (compound that contains only c a…
\( C_6H_6 \)
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what causes different colors to appear in the sky? the absorption of li…
the scattering and reflection of light by dust particles
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question 3 (1 point) match the term with its definition: column a 1. ki…
1. Kinetic Energy - d. The energy associated with an object in motion 2. Chemical Potential Energy - b. The energy stored in the bonds of molecules 3. Conservation of Energy - a. …
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question 1 (1 point) what is the primary difference between hydrogen an…
1. Question 1: a. Hydrogen produces more energy per gram than gasoline 2. Question 2: b. The strength of the bonds formed or broken. 3. Question 3: 1. d. The energy associated wit…
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which of these work together to attach to rock to chemically change roc…
A. pioneer species
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question 37 (1 point) when is the inverter magnet system most stable? a…
d. When magnets are equidistant and balanced. --- # Question 38
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question 33 (1 point) modeling bond length which model uses small magne…
Question 33: a. Magnetic Marbles Model Question 34: a. The temperature increase in the room Question 35: False Question 36: c. It doesn't accurately simulate all types of molecule…
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question 29 (1 point) what determines if a reaction results in an incre…
Question 29: b. All of the choices Question 30: c. The end of the bond-breaking process Question 31: c. Combustion produces CO₂ and water as by-products Question 32: b. Transporta…
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question 25 (1 point) breaking bonds during a chemical reaction require…
Question 25: True Question 26: d. Observations about trends in the data. Question 27: a. Endothermic reactions Question 28: b. Bonds strengthen as atomic size decreases.
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question 19 (1 point) what happens to the overall energy in a reaction …
Question 19: b. Energy is released. Question 20: b. To track progress in understanding hydrogen combustion Question 21: d. Both physical (virtual) and computational models
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question 17 (1 point) why might hydrogen produce more energy per gram t…
Question 17: c. The combustion process of hydrogen releases a greater amount of heat Question 18: b. Renewable fuels tend to produce less CO2 than fossil fuels
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question 15 (1 point) what part of the simulation corresponds to bond b…
Question 15: b. The simulation shows particles moving apart and separating Question 16: d. The strength of the bonds being formed and broken differs.
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question 12 (1 point) what does the law of conservation of energy state…
Question 12: a. Energy remains constant and can only be transformed, not created or destroyed Question 13: True Question 14: d. The interaction between charged particles.
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question 10 (1 point) what happens when two bonded atoms are pushed clo…
Question 10: d. Repulsive forces increase significantly. Question 11: c. It is absorbed by the system.
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question 8 (1 point) match the material with its use in the syringe des…
### Question 8: 1. Hot Water - a. Provides the heat source to increase particle movement 2. Syringe - b. Shows the observable scale movement of particles 3. Thermometer - d. Measu…
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question 6 (1 point) what observation supports the idea that burning et…
Question 6: b. The ethanol produced heat and light during burning Question 7: b. Energy is being absorbed into the system.
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question 4 (1 point) data analysis what might \wanderings\ about the ch…
c. Predicting why bond energy decreases for larger atoms. --- # Question 5
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which of these elements forms the same number of covalent bonds (shared…
A. nitrogen
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oxygen difluoride (\\(\\ce{of2}\\)) and magnesium oxide (\\(\\ce{mgo}\\…
A. \( \text{OF}_2 \)
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for each nonmetal below, identify how many covalent bonds (shared elect…
| Element | Number of covalent bonds | |---------|--------------------------| | H | 1 | | C | 4 | | N | 3 | | O | 2 | | Br | 1 |
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apply: predicting covalent bonds google classroom microsoft teams you m…
A. hydrogen B. oxygen
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in general, nonmetals in the same form the same number of covalent bond…
group
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complete the statements. a single covalent bond involves shared pair(s)…
s: - Single covalent bond: 1 shared pair, 2 electrons total. - Double covalent bond: 2 shared pairs, 4 electrons total. - Triple covalent bond: 3 shared pairs, 6 electrons total. …
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complete the statement. in general, nonmetals in the same ______ form t…
B. group
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nonmetals form covalent bonds (shared electron pairs) with other atoms.…
C. the number of additional electrons the nonmetal needs to fill its valence shell
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(salts). three pure halogens: chlorine gas, liquid bromine, and solid i…
First dropdown: gain Second dropdown: 1 Third dropdown: negative
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which scenario is an example of a physical change? wood is burned in a …
Lead is melted into a liquid to form pellets.
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which describes a feature of the physical changes of all substances? ca…
does not change the identity of a substance
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fill in the table by selecting the correct iupac name for each formula.…
To solve this, we analyze each chemical formula and correct its IUPAC name: ### For \(\boldsymbol{\ce{RbCl}}\): - \( \ce{Rb} \) is rubidium (not "rubidium" misspelled as "rubidium…
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read the stanza from \the charge of the light brigade:\ \forward, the l…
AABBDDEEC
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the mass number of a nitrogen atom is 14. find its atomic number in the…
There are 7 neutrons.
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your answer is incorrect. decide what kind of crystalline solid each el…
### For \( \ce{F2} \): - Type of solid formed: molecular - Force holding the solid together: London dispersion forces ### For \( \ce{HOCl} \): - Force holding the solid together: …
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energy changes and rates of reaction 5. use hess’s law to calculate the…
\( \Delta H^\circ = -1628.2 \, \text{kJ} \)
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which statement primarily appeals to pathos to support the position tha…
If we want students to become well-rounded citizens who are passionate about lifelong learning, we must allow them to pursue their interests by taking elective courses.
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which phrase describes air density? increases as altitude increases equ…
equals mass divided by volume
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which statements correctly describe the properties of air? select three…
- B. Air pressure is created by the weight of the atmosphere pushing on Earth’s surface. - D. Denser air is heavier than less dense air. - E. Air is less dense at higher altitudes.
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4. name the following molecules using iupac rules.
- First Molecule: 3 - ethyl - 2 - methyl - 3 - hexene - Second Molecule: Pentanoic acid - Third Molecule: Propanal
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question 3 of 21 which of the following poems most clearly uses its rhy…
D. I see around you a corona of autumn leaves, / but then I think of death!
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the histogram represents the distribution of boiling temperatures, in d…
B. The distributions do not overlap on the same range of temperatures.
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13. drag and drop the formulas with the chemical names. formulas: feo, …
- $\text{FeO}$: iron (II) oxide - $\text{Hg}_2\text{O}$: mercury (I) oxide - $\text{HgO}$: mercury (II) oxide - $\text{Fe}_2\text{O}_3$: iron (III) oxide
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contents of this page will be cut out and pasted to your notebook types…
To solve this worksheet on types of energy, we first recall the definitions and examples of each energy type: ### 1. Chemical Energy - **Description**: Energy stored in the bonds …
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we know that solids and liquids have very ______________ properties and…
1. different 2. pulled 3. tidal bulge 4. second
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science 30 unit d: energy and the environment harvesting chemical energ…
a. $\Delta H_{comb} = -1234.8\ \text{kJ/mol}$ b. $\Delta H_{comb} = -5756.2\ \text{kJ}$ (for the given balanced equation) or $-2878.1\ \text{kJ/mol of } C_4H_{10}$ c. $\Delta H_{c…
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7) drag and drop the molecular shapes with the lewis structures. choice…
- $\text{F-P-F (with one lone pair on P, three F atoms)}$: trigonal pyramidal - $\text{F-Be-F (with three lone pairs on each F)}$: linear - $\text{Cl-C-Cl (four Cl atoms around C)…
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substance - water - air - salt - argon gas - sea water - carbon dioxide…
| Pure Substance | | Mixture | |--|--|--| | **Element** | **Compound** | | | argon gas <br> graphite <br> gold bracelet <br> tin can | water <br> salt <br> carbon dioxide | air <b…
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6) drag and drop the molecular shapes with the images. choices: tetrahe…
1. Linear 2. Trigonal planar 3. Bent 4. Tetrahedral 5. Trigonal pyramidal
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4) choose the best answer. what is the cause of the various molecular s…
4) the electrostatic repulsion of valence electrons 5) lone pair of electrons on the central atom
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1) choose the best answer. the three - dimensional shape of atoms in a …
1) O molecular geometry 2) O VSEPR 3) - $\square$ the number of single, double, or triple bonds - $\square$ VSEPR theory - $\square$ Lewis structures
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math connections chemical properties and interactions name: date group:…
### Completed Data Table: | Object | Mass (g) | Volume (cm³) | Density (g/cm³) | |------------------|-----------|--------------|-----------------| | Vegetable Oil | 18.83 | 20.42 …
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geniuschallenge water cycle 1. the process of water changing from a liq…
1. freezing ### Question 2
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16. what is the name of this fuctional group? r—o—p(=o)(oh)(oh) (the st…
phosphate group
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9) use a periodic table to type in the correct answer for each blank. (…
C: 4 N: 3 O: 2 F: 1 Ne: 0
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7) choose the best answer. which of these represents a correctly drawn …
The fourth option (rightmost): $\text{O}-\text{N}(=\text{O})-\ddot{\text{O}}:$ (with three lone pairs on the single-bonded oxygens and two lone pairs on the double-bonded oxygen)
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12. name the functional group on this molecule amine group methane carb…
12. carboxyl group 13. fatty acid (carboxyl group)
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5) choose the best answer. how many lone pairs of electrons are present…
5) 2 6) nitrogen
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3) choose the best answer. which structure represents a correctly drawn…
3) $\boldsymbol{H—\ddot{N}—H}$ (with three H atoms, $\boldsymbol{\ce{H-\underset{\cdot \cdot}{\overset{H}{N}}-H}}$) 4) $\boldsymbol{0}$
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question 3 (1 point) the isotope americium-241 (used in smoke detectors…
1. neptunium-237 2. nitrogen-14
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after watching the video and performing any associated labs and/or expe…
1. 1) Color change; 2) Production of gas; 3) Change in energy (temperature change/light release); 4) Formation of a precipitate 2. Matter is anything that has mass and occupies sp…
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1) choose the best answer. a(n) ____ structure is a two - dimensional d…
1) C. Lewis 2) A. octet
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use the ideal gas law below to solve the following problems. pv = nrt w…
s (Key Results): 1. $\boldsymbol{0.122\ \text{mol}\ \text{O}_2}$ 2. $\boldsymbol{\approx 50.7\ \text{L}\ \text{N}_2}$ 3. $\boldsymbol{\approx 27.8\ \text{atm}}$ (corrected) 4. $\b…
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a certain liquid has a density of 0.732 g/ml. how many liters would wei…
\(1.37\space L\)
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question 7 (1 point) the energy change for a chemical reaction that inv…
Question 7: B. standard heat of formation Question 8: B. Chemical energy decreases and the total kinetic energy of the molecules increases.
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question 5 (1 point) a chemical change that involves a release of energ…
1. Question 5: C. exothermic change 2. Question 6: B. non-renewable
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part c. match the compound to the molar mass draw lines to match each c…
- \( \text{KBr} \) matches 119 g/mol (correct, mark √). - \( \text{Na}_2\text{SO}_4 \): Student’s 110.04 is incorrect (mark X), correct molar mass ≈ 142.05 g/mol. - \( \text{CaBr}…
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platelets 350,000/mm³ (350 × 10⁹/l) normal sodium 139 meq/l (139 mmol/l…
cardiogenic shock
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platelets: 350,000/mm³ (350 × 10⁹/l), normal; sodium: 139 meq/l (139 mm…
ischemia
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8 fill in the blank 7 points perform the following conversions. set up …
- start: \( 45.2\) - conversion #1 (g box): \( 1\) - conversion #2 (kg box numerator): \( 1\), conversion #2 (denominator unit, bottom row last blank): \( g\) - standard notation:…
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7 fill in the blank 5 points complete the sentences below using the cor…
1000 ### 2.
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d. if you have 80.0 grams of lye (naoh), how many moles would you have?…
d. 2.00 moles e. 1.00 moles f. 2.00 grams
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★ time and change 5. compare the graph \military deaths in world war i\…
### Question 5 (Ranking Casualty Figures) To solve this, we refer to typical World War I and US Civil War casualty data: - **Russia (WWI)**: ~1,700,000+ military deaths. - **Germa…
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the hydrogen peroxide in dental strips makes your teeth whiter. this st…
chemical property
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d. another way of writing the chemical formula of vinegar is ch₃cooh. u…
d. Acetic acid a. $\text{Na} + \text{H}_2\text{O} ightarrow \text{NaOH} + \text{H}_2$ b. $2\text{Na} + 2\text{H}_2\text{O} ightarrow 2\text{NaOH} + \text{H}_2$ c. $40.00\ \text{g/…
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limestone is a sedimentary rock ( like the one pictured below ) consist…
Carbonic acid in seawater forms puddles and caves on limestone
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which of the following examples shows a physical property of the given …
Option 3. Gold has high luster
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well done, you have proven that you know how to work in a lab. what do …
c) Take off your lab coat and wash your hands
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a sample liquid is cooled from 150°c to 30°c, causing the liquid to cha…
The correct option is the one stating "A physical change has occurred." (Assuming the option is labeled, for example, if it's the second option: B. A physical change has occurred.)
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precisely! there are usually two different types of fire extinguishers:…
a). CO₂ is freezing cold
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so let me ask you once again. what do you have to do if there is an une…
b) Evacuate
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part 3: subatomic structure of compounds vinegar has the chemical formu…
### Part a. | | Element name | How many are in the formula? | |---|---|---| | Element 1 | Carbon | 2 | | Element 2 | Hydrogen | 4 | | Element 3 | Oxygen | 2 | ### Part b. #### Ele…
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why didnt you just clean the spill with water? a) the acid reacts with …
a) The acid reacts with water
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what does the hazard symbol on the beaker mean? click the view image bu…
a) Corrosive
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returning all unused chemicals to their original containers is a good p…
False
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44. a mental disorder in which a person is overwhelmed by sad feelings …
c. Depression ### Question (Second disease - related, let's assume it's Q45)
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here is an image of the hazard symbol on the box. what does it mean? cl…
c) Explosive
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in the mixture of sand and water (dirty water), a clear water can be se…
filtering