Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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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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maltose is a disaccharide found mostly in the seeds of wheat, oats, ric…
Maltose is a \(\boldsymbol{\text{disaccharide}}\) made of the \(\boldsymbol{\text{two molecules of}}\) glucose. Compared to lactose and sucrose, maltose has \(\boldsymbol{\text{th…
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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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directions: identify the choice that completes the text so that it conf…
C. however, ### Question 2
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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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which of the following is the quantity of diluent a pharmacy technician…
245 mL
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eastern woodlands – the lenape of new jersey the lenape, also known as …
- Way 1: The Lenape located their villages along rivers (e.g., Delaware, Passaic, Raritan) which served as trade corridors and food sources, adapting to the water - rich New Jerse…
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where is water found on the ph scale? ○ 4
7 (Note: If the question expects choosing from the given option “4” and other unshown options, but based on chemistry, pure water has a pH of 7. If “4” is the only shown option an…
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how many neutrons are found in a carbon atom?
6
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express your answer with the appropriate number of significant figures.…
60.0 mL
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correct correct answer is shown. your answer 78.0 ml was either rounded…
\(62.0\)
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the atoms in o=c=o (carbon dioxide) are held together by this type of b…
D. non - polar covalent
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3. station 3: demo- baking soda and vinegar in a cup go to the demo sta…
s (Filled Table - Example) | Question | Answer | |-----------------------------------|-----------------------------------------------------------------------| | What is the initia…
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bell ringer chormatography what is the stationary phase in paper chroma…
C. The paper
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bell ringer chormatography paper (stationary phase) ink spot to be sepa…
The red dye is attracted to the mobile phase
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2. what trends do you notice for the atomic radii of group 2a? 3. what …
As atomic number increases (moving down Group 2A), atomic radii increase. ### Question 3
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2.27 × 2.2 = ? 2.27/2.2 = ? 2.27 + 2.2 = ? 2.27 − 2.2 = ? incorrect rou…
To solve these problems, we'll apply significant figure rules for each operation (multiplication/division, addition/subtraction). ### 1. \( 2.27 \times 2.2 = ? \) #### Step 1: Per…
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summary questions 1. what is an atom? a) the smallest part of an elemen…
a) The smallest part of an element that retains the properties of that element. ### Question 2
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6. on the same graph, make a line graph the first three atoms in group …
To create the line graph: 1. **Plot Points**: Mark (4, 900) for Be, (12, 736) for Mg, and (20, 590) for Ca on the graph (x - atomic number, y - ionization energy). 2. **Draw Line*…
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2. what trends do you notice for the atomic radii of group 2a? 3. what …
As we move down Group 2A (from top to bottom), the atomic radii **increase**. This is because each successive element has an additional electron shell, increasing the distance bet…
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question: shining x-ray light on a crystal molecule to determine its th…
x - ray crystallography.
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camera, the photographer has 28 nominal minutes to develop it, using mo…
D) mere ### Question 29
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within a period: electronegativity increases from (left to right, right…
### Part 1: Electronegativity Trends #### Within a Period: Electronegativity increases from **LEFT to RIGHT** because atoms on the right need **LESS** electrons to complete their …
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camera, the photographer has ██ nominal minutes to develop it, using mo…
D) mere ### Question 29
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wet plate photographers essentially create their own film. the process …
B) Yes, because it sets up the paragraph’s outline of the process of wet plate photography. ### Question 26
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wet plate photographers essentially create their own film. the process …
C) No, because it blurs the paragraph’s focus on the dangers involved in wet plate photography. ### Question 26
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ii. electronegativity- is ability of an atom to _______________ to itse…
### Part II: Electronegativity Definition Electronegativity is the ability of an atom to **attract electrons** to itself to become **stable** (by **gaining** electrons). ### 1a: O…
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24. hydrogen bonds are a form of ________ interaction, where ________ b…
intermolecular, hydrogen, electronegative, electronegative, molecule
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24. hydrogen bonds are a form of __________ interaction, where ________…
intermolecular; hydrogen; electronegative; electronegative; molecule
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2. a. calculate the atomic mass in amu or u of unknown element with the…
(Part a): The atomic mass of the unknown element is approximately \(\boldsymbol{39.95}\) amu (or u). ### Part b: Identify the Element
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drag the appropriate labels to their respective targets. view available…
# Explanation: ## Step1: Round 12.462 to different sig figs - Four sig figs: 12.46 (wait, no, 12.462 has digits 1,2,4,6,2. Four sig figs: look at the fifth digit (2) to round the …
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carbon • carbon has the ability to create ______ bonds with up to _____…
- carbon has the ability to create \(\boldsymbol{\text{covalent}}\) bonds with up to \(\boldsymbol{4}\) other \(\boldsymbol{\text{atoms}}\) - covalent bonds are very \(\boldsymbol…
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marie curie discovered elements radium and polonium. is this an example…
A. Science
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instructions: classify each of the following as an intensive property i…
E ### 42. Density Density (\( ho = \frac{\text{mass}}{\text{volume}} \)) is intrinsic (same for any amount of the substance). So, it is an intensive property.
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6. state the number of significant digits in each of the following meas…
6. (a) 3 (b) 2 (c) 3 (d) 1 (e) 3 (f) 2 (g) 3 (h) 1 7. (a) 60.76 g (rounded to 60.76? Wait, 50.511 + 10.25 = 60.761, and the least decimal places is 2 (from 10.25), so round to two…
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(\frac{16.83}{15} - 0.46) nd the answer appropriately s your answer num…
0.66 (or 0.662, depending on sig fig interpretation. But likely 0.66 when rounded to two decimal places)
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evaluate: $\frac{4.00}{10} = 0.40$ and round the answer appropriately e…
0.4
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instructions: classify each of the following changes in matter as physi…
To solve this, we determine if a change is physical (no new substance, just state/shape) or chemical (new substance formed). ### 31. Grinding chalk into powder - Explanation: Only…
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14.2 four special kinds of pronouns (demonstrative and relative pronoun…
### Exercise 1: Recognizing Demonstrative Pronouns (Underline the demonstrative pronouns) 1. **Step 1: Identify demonstrative pronouns (those, these, that, this).** - Sentence: *T…
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write 13.3 kilocalories using the unit abbreviation.
$13.3$ kcal
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instructions: classify each of the following properties of matter as ph…
P ### 22. Density Density is a physical property (measured without chemical change).
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instructions: classify each of the following as an elemente, a compound…
E ### 12. Water Water ($\ce{H_2O}$) has hydrogen and oxygen atoms bonded.
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name josiah pollock 9/10/25 chemistry i worksheet classification of mat…
s: 1. E 2. O 3. O 4. E 5. O 6. E 7. E 8. O 9. O 10. O
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reading the periodic table of elements: use the periodic table above to…
### Question 1: Write the SYMBOL for each of the following elements #### a. Carbon Carbon's chemical symbol is a well - known symbol in chemistry. The symbol for carbon is $\text{…
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evaluate (6 \times 0.222 \times 7.0) and round the answer appropriately…
\(9\)
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1. define atom: 2. what does the greek word atomos mean? 3. what three …
indivisible ### Question 3
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name ______ chemistry i worksheet classification of matter and changes …
### Part 1: Classify as Heterogeneous (E) or Homogeneous (O) 1. **Wood**: It has different components (e.g., fibers, lignin) not uniformly distributed. So, E. 2. **Freshly - brewe…
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date ______ name ______ section ______ postlaboratory assignment 1. sta…
meter #### (b)
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complete the table below, using the diagram of an atom shown at right. …
The table is already correctly filled as: | name | symbol | charge (in multiples of \(e\)) | approximate mass (amu) | location on diagram | |---------|--------|-------------------…
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still feels unmotivated when learning chemistry and geography and asks …
A. Focus@Will
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after agreeing with your suggestion to try out notion for tracking her …
B. Rewards that unlock music tutorials after learning sessions
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question 16 of 20 : select the best answer for the question. 16. which …
A. Ionic
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responsibilities. she’s a talented musician but struggles with balancin…
Notion
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which of the following would best describe x in the diagram above? a) b…
C. Volcanic eruptions are a major source of non - anthropogenic inputs.
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part iii- true or false ____7. in the density column to the right, oil …
False ### Question 8
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6. a rock has a mass of 60 grams. a graduated cylinder has an initial v…
Volume of rock: \( 20 \, \text{mL} \) (or \( 20 \, \text{cm}^3 \)), Density: \( 3 \, \text{g/cm}^3 \) ### Question 7
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2. four mixtures are made by combining two clear liquids, and observati…
B. Mixture 2: The liquids, when mixed, produced a solid which settled to the bottom.
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density & chemical changes 6th grade review this is what i should have …
D. Bubbles are given off and there is a temperature change. ### Question 2
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part i-matching 1. the image shows what happens when cold medicine tabl…
D. Bubbles are given off and there is a temperature change.