Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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to (reassure) even those southerners who have accepted the following: i…
C. logical appeal
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11. magnesium hydroxide, mg(oh)₂, has a ( k_{sp} = 6.3 \times 10^{-10} …
b. 0.10 M NaOH ### Question 12
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10. on the basis of the solubilities (in mol/l) listed below, what is t…
d. \( \text{AgSCN} > \text{AgBr} > \text{AgCN} \)
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practice test f2 (pg 2 of 6) solubility equilibrium, $k_{sp}$ 9. on the…
b. \( \text{AgBr} < \text{AgCl} < \text{Ag}_2\text{CO}_3 \)
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8. the solubility of metal(ii) sulfide, $k_{sp}=1.6 \\times 10^{-11}$, …
a. \( 4.0 \times 10^{-6} \)
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7. equal volumes of $1.6 \\times 10^{-5} m kcl$ and $1.6 \\times 10^{-5…
b. there is no precipitate formed.
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6. the solubility of silver sulfide is $8.0 \\times 10^{-17} m$. determ…
c. $[16.0\times 10^{-17}]^2 [8.0\times 10^{-17}]$
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5. determine the solubility of lead(ii) fluoride, ( k_{sp} = 4.0 \times…
a. \(2.0 \times 10^{-3}\ M\)
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4. what is the molar solubility in water of pbi₂? (the ( k_{sp} ) for (…
e. $2 \times 10^{-3}\ \text{M}$
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question 16 (multiple choice worth 4 points) a committee is working on …
D. Determining a specific percentage target of residents for increasing recycling
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which of the following molecules is not formed by covalent bonding 1 po…
C. \( \text{NaCl} \)
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3. $\\ce{h_{2}so_{4} + 2 naoh \ ightarrow 2 h_{2}o + na_{2}so_{4}}$ how…
Approximately \( \boldsymbol{17.3} \) moles (or more precisely ~17.27 mol) of \( NaOH \) are needed.
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color combinations use the color wheel to help you determine the differ…
## Secondary colors (pre-filled, confirmed): Orange, Purple, Green ## Intermediate colors: Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet ## Compleme…
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elements, compounds, and mixtures classify each of the pictures by matc…
To solve this, we analyze each diagram based on the definitions: ### 1. First Diagram (Top - Left) - All molecules are the same (two types of atoms bonded, so a compound). And the…
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nomenclature worksheet 3 - covalent (molecular) compounds part a: name …
1. CO: Carbon Monoxide 2. CO₂: Carbon Dioxide 3. N₂O₃: Dinitrogen Trioxide 4. N₂: Dinitrogen 5. NP: Nitrogen Monophosphide 6. SCl₂: Sulfur Dichloride 7. P₂O₅: Diphosphorus Pentoxi…
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horizons the o horizon contains leaf litter and other decaying organic …
1 ### 2. Transition/C horizon location
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calculate the number of grams contained in 3.20 moles of rubidium dichr…
\( 1240 \, grams \) (or \( 1.24 \times 10^3 \, g \))
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question 24 (24) which method is used for testing impairment? a. police…
Question 24: B. Chemical test Question 25: D. Has reasonable suspicion that you are driving under the influence.
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13. what is the oxidation number of carbon in c₂h₆? a. -4 b. -3 c. -2 d…
B. -3 ### Question 14
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question 22 4 pts (22) if a driver refuses to summit to a chemical test…
Question 22: B. 1 year Question 23: A. Depressant
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9. what is the oxidation number of iron in fe₃o₄ (average value)? a. +2…
C. +2.67 ### Question 10
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(10) any driver under 21 is considered to be \driving while impaired\ i…
(10) B. .01 (11) B. Try to stop him/her
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how many moles are in 78.9 grams of fes? include the unit with the answ…
$0.90\ mol$ (or $0.897\ mol$, depending on precision)
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question #4- use the balanced equation to answer the following question…
Question #4: 11.3 moles Question #5: 1.5 moles
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how many moles are contained in 9.54 × 10²³ atoms of platinum? include …
1.58 moles
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question #2- use the balanced equation to answer the following question…
Question #2: 4 moles Al : 2 moles $\text{Al}_2\text{O}_3$ Question #3: 1 mole
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question 3 not yet answered marked out of 1 flag question how many mole…
\( 0.144 \) moles
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22. complete the following table. characteristic: | ionic compounds | c…
To complete the table, we analyze the properties of ionic and covalent compounds: ### Step 1: Melting Point - **Ionic Compounds**: Have high melting points (strong ionic bonds req…
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question #1 - use the balanced equation to answer the following questio…
○ 2
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5. in the reaction below: fe + cuso₄ → feso₄ + cu which substance is ox…
A. Fe ### Question 6
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while researching a topic, a student has taken the following notes: mos…
C. Cosmochemist Kentaro Terada set out to determine whether some of the Moon’s oxygen was coming from Earth.
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advanced redox reactions quiz – honors / pre-ap chemistry (15 questions…
B. Loss of electrons ### Question 2
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snc 2d assignment: ionic and covalent compounds 11. for each of the fol…
To solve this, we analyze each compound to determine if it's ionic (formed between metal/ammonium and non - metal/polyatomic ion) or covalent (formed between non - metals) and the…
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19. using your electronegativity chart, calculate the electronegativity…
To solve this, we use electronegativity values (from a standard chart: H=2.1, Cl=3.0, C=2.5, S=2.5, K=0.8, I=2.5, Se=2.4, F=4.0, Mg=1.2, Br=2.8, S=2.5). The formula for electroneg…
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18. write formulas for the following ionic and molecular compounds: a. …
a. $H_2O$ b. $Al_2S_3$ c. $NaOH$ d. $IBr_3$ e. $As_2Cl_5$ f. $CO$ g. $CuCl_2$ h. $C_2F_6$ i. $SiCl_4$ j. $CaSO_4$
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17. name the following ionic and molecular compounds: a. n₂o₅ b. k₂so₄ …
s: a. Dinitrogen pentoxide b. Potassium sulfate c. Nitrogen monoxide d. Dinitrogen tetroxide e. Sodium chloride f. Ammonia (Nitrogen trihydride) g. Magnesium oxide h. Ammonium hyd…
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plain the terms electron domain, bonding domain, and nonbonding domain.
- **Electron Domain**: A region around a central atom in a molecule with concentrated electrons (bonding/non - bonding). - **Bonding Domain**: Electron domain with pairs in chemic…
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16. draw the following molecular shapes and describe their electron dom…
### Linear: - **Electron Domains**: 2 bonding, 0 non - bonding. - **Drawing**: Central atom with two bonds at 180°. ### Bent: - **Electron Domains**: 2 bonding, 1 - 2 non - bondin…
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question 4 (multiple choice worth 2 points) (05.02r mc) amara wants to …
Sonnet
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question 4 not yet answered marked out of 1.00 flag question fill in th…
Question 4: c. Matter Question 5: b. Physical Question 6: a. Analysis
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question: seawater contains salt, a/an ____ molecule that consists of a…
ionic
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9 multiple choice 1 point what term is used to describe a substance tha…
9. A desiccant 10. Pentane
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5.an even greater benefit has been observed in swimming. in denmark, th…
D. People can have social interactions while engaged in individual sports, whether they are swimming or skating.
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for problems 7 - 10, solve the system of equations using elimination. 7…
7. $x=2$, $y=0.5$ 8. $x=3$, $y=-3$ 9. $x=14$, $y=11$ 10. $x=1.25$, $y=3.75$ 11. Pure water: 16 L, Salt water: 64 L 12. $\begin{cases} 5x + 2y = 34 \\ 2x - 1y = 1 \end{cases}$ (oth…
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energy linking literacy post - reading create a graph sketch of how pho…
A labeled endothermic graph for photosynthesis: 1. **Axes**: - Y-axis: Energy - X-axis: Reaction Progress 2. **Reactants**: Mark a horizontal line at lower energy, labeled $\text{…
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______ $c_3h_8$ + _________$o_2$ $rightarrow$ _________ $co_2$ + ______…
Approximately \( 51.9 \, \text{g} \) (or more precisely \( \approx 52 \, \text{g} \)) of propane are combusted.
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how many grams of $c_2h_5oh$ are there in 2.58 mol? 25g of nacl = _____…
$\approx 0.428$
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c₂h₅oh: 46.08 g/mol how many grams of c₂h₅oh are there in 2.58 mol?(10 …
The mass of \(\ce{C2H5OH}\) is \(\boldsymbol{118.89\space g}\) (rounded to two decimal places) or \(118.8864\space g\) (exact value from calculation).
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what is the molar mass of the following compounds? (5 points each) fe₂o…
s: - $Fe_2O_3$: $\boldsymbol{159.7\ g/mol}$ (or $160\ g/mol$ approximately) - $H_3PO_4$: $\boldsymbol{98.00\ g/mol}$ - $FeBr_3$: $\boldsymbol{295.55\ g/mol}$ (or $296\ g/mol$ appr…
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questions: 1. what type of reaction is this?(circle one) endothermic ex…
To solve the problem, we need to know the mass of the gummy bear (glucose, \( C_6H_{12}O_6 \)) used. Let's assume the mass of the gummy bear (glucose) is \( m \) grams. First, we …
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csub california state university, bakersfield department of chemistry e…
Since the problem here is about filling out the data and observations for the "Exploding Gummy Bears" experiment (a chemistry - related experiment), we can describe what is typica…
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student grades on a chemistry exam were: 79, 78, 76, 82, 86, 50, 79, 81…
B. The two outliers are 50 (because it lies 1.5 × IQR below the first quartile) and 99 (because it lies 1.5 × IQR above the upper quartile).
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choose the option from the drop - down menus that is best described by …
- Involves combining of nuclei: nuclear fusion - Produces dangerous radioactivity: both - Have high activation energies: nuclear fusion - Releases large amounts of energy: both - …
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use the periodic table to complete each nuclear fusion equation.\\(\\ce…
A: $5$ B: $2$ C: $15$ D: $8$ E: $\text{O}$
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what is the empirical formula for methamphetamine (shown below)?
$\boxed{C_{10}H_{15}N}$
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calculate the mass, in grams, of 0.2 moles of mn. the mass of one mole …
The mass of 0.2 moles of Mn is 10.988 grams.
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determine the mass in grams of 2.91 moles of licl.
\(123\space g\) (or more precisely \(123.35\space g\))
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part i qualitative tests 1. colors of the following gases: nitrogen dio…
1. Colors of the following gases: Nitrogen dioxide: Reddish-brown Nitric oxide: Colorless Chlorine: Pale greenish-yellow Hydrogen chloride: Colorless Hydrogen: Colorless Oxygen: C…
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what is one of the rare earth elements mentioned in the text? silver sc…
B. Scandium
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a patient comes to crouse hospital for her chemotherapy infusion. she a…
- "There are new guidelines in place to keep healthcare workers, patients, and the environment safe."
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which of the following do e - cigarette users inhale and exhale for oth…
1. False 2. All options apply: - Heavy metals such as nickel, tin and lead - Cancer causing chemicals - Volatile organic compounds - Flavorings such as diacetyl, a chemical linked…
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7. _zn + _hcl → _zncl₂ + _h₂ balanced equation: ___________ molar mass …
### Problem 7 Balanced Equation: $\boldsymbol{\text{Zn} + 2\text{HCl} ightarrow \text{ZnCl}_2 + \text{H}_2}$ Molar Mass of Reactants (g/mol): Zn: 65.38, HCl: 36.46 Molar Mass of P…
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read the poem \a jelly - fish\ by marianne moore. then, answer the ques…
Free verse (a form of poetry with no fixed rhyme scheme, meter, or regular line structure)
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match each poetry term with its correct description. match term definit…
Line length - A) Determined by the sets, or feet, of stressed and unstressed syllables in a line of poetry Rhyme scheme - D) The pattern of letters assigned to the common sounds o…
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ronan is reading a poem that repeats the same two lines throughout its …
D. Villanelle
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way down south in dixie (break the heart of me) they hung my black youn…
C. AABA ABCB AABA (Go to #11)
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read the first stanza of the ballad \paul reveres ride\ by henry wadswo…
AABBA
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chemical reactions \writing formula equations\ - ws #1 directions: conv…
\( 4\text{Na} + \text{O}_2 ightarrow 2\text{Na}_2\text{O} \) ### Problem 2:
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equations” - ws #1 directions: convert the following word equations int…
$$4Na + O_2 ightarrow 2Na_2O$$ ### Problem 3:
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1. most of our electricity comes from the conversion of _______________…
chemical (or mechanical, depending on context; but most common is chemical) ### Question 2
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reinforcing exercise in 1928, bacteriologist alexander fleming was stud…
Fleming's chance observation of the antibacterial properties of mold led to the discovery of penicillin as a treatment.
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8. the molar mass of glucose (c6h12o6) - a) 12,g/mol - b) 180,g/mol - c…
b) 180,g/mol
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7. which of the following compounds has a molar mass of 44.0 g/mol a) c…
a) CO2
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choose the correct answer from the choices for each question: 6. what i…
c) 58.5 g/mol
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fill in the blank fill in the blank with the correct words: 1. the mola…
1. 18.02 (or 18) 2. atomic masses 3. 44.01 (or 44) g/mol 4. g/mol 5. atomic masses
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stoich ws 3 1. how many molecules of o₂ gas must react to form 0.68 gra…
Approximately $4.73 \times 10^{20}$ molecules of $\ce{O2}$ ### Problem 2
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two or more atoms of different elements that are chemically combined. 1…
Compound (the term in the red box corresponds to the definition "Two or more atoms of different elements that are chemically combined")
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what are the two types of properties matter has? select all correct opt…
C. physical, D. chemical (assuming the red is option C and blue is D; if labels are different, the correct options are the ones with "physical" and "chemical" text)
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which is a measure of the amount of space matter takes up? volume weigh…
A. volume
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pop quiz name_____________________ multiple choice. choose the one alte…
A. 129.3 mL of 0.145 M solution of KCl ### Question 2
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period structions: determine the number of grams in each of the quantit…
1. 2.5 moles of NaCl: $\boldsymbol{146.25\ \text{g}}$ 2. 0.50 moles of $\text{H}_2\text{SO}_4$: $\boldsymbol{49\ \text{g}}$ 3. 1.70 moles of $\text{KMnO}_4$: $\boldsymbol{268.6\ \…
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name mayela conzalez date 2-4-2026 period 1st $100 chemistry: measureme…
If we use the correct molar mass of \( NaCl \) (\( 58.44\space g/mol \)): \( \approx0.347\space mol \) If we use the incorrect molar mass as in the text ( \( 35.45\space g/mol \),…
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focusing on signature dishes in an effort to meet the new demands of di…
quality over quantity
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verify your calculation. in your set-up, do your units cancel? mass of …
\( \approx 0.000782 \, \text{mol} \) (or more precisely, \( \frac{0.019}{24.305} \approx 7.82 \times 10^{-4} \, \text{mol} \))
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mass of magnesium (g) 0.217 moles of magnesium (mol) blank box
The moles of magnesium is approximately $0.00893\ \text{mol}$ (or depending on significant figures, could be adjusted, for example, if we consider three significant figures from 0…
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gases produced by a chemical reaction can easily be collected over wate…
\( 627.6 \) mmHg
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enrichment: geology of the appalachians read the passage below and comp…
| Environment | Event | Rock Type | |-------------|-------|-----------| | Shallow seas along the edge of North America | Thick layers of clay, sand, and organic material are depos…
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the component of a solution that is present in a smaller amount is call…
FALSE
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section iii: critical thinking 17. the polyatomic ion bromate, bro₃¹⁻, …
Bromite ion: $\boldsymbol{\ce{BrO2^-}}$ (charge -1) Bromic acid: $\boldsymbol{\ce{HBrO3}}$ Bromous acid: $\boldsymbol{\ce{HBrO2}}$
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7. hcn section ii: formulas for binary acids and oxyacids correctly wri…
s: 9. \(\boldsymbol{\ce{H_3PO_4}}\) 10. \(\boldsymbol{\ce{HBr}}\) 11. \(\boldsymbol{\ce{H_2SO_3}}\) 12. \(\boldsymbol{\ce{HClO_4}}\) 13. \(\boldsymbol{\ce{HF}}\) 14. \(\boldsymbol…
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is the following a heterogeneous mixture, a homogeneous mixture, an ele…
a. Heterogeneous mixture
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question 48 not yet answered marked out of 1.00 flag question is the fo…
1. a. Heterogeneous mixture 2. d. Compound 3. a. Heterogeneous mixture
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question 45 not yet answered marked out of 1.00 flag question is the fo…
Question 45: a. Heterogeneous mixture Question 46: a. Heterogeneous mixture Question 47: c. Element
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question 42 not yet answered marked out of 1.00 flag question is the fo…
1. a. Chemical 2. b. Physical 3. b. Homogeneous mixture
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question 38 not yet answered marked out of 1.00 flag question is the fo…
Question 38: b. Physical Question 39: a. Chemical Question 40: a. Chemical Question 41: b. Physical
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question 35 not yet answered marked out of 1.00 flag question is the fo…
Question 35: a. Chemical Question 36: b. Physical Question 37: b. Physical
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question 32 not yet answered marked out of 1.00 flag question is the fo…
Question 32: a. Chemical Question 33: b. Physical Question 34: b. Physical
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match the term with the correct definition. properties that can be obse…
1. Properties that can be observed without changing the chemical composition of the sample of matter: **Physical Properties** 2. Describes an occurrence that has been tested under…
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fill in the blanks. how close multiple measurements are to each other i…
1. Precision 2. Accuracy 3. Qualitative 4. Quantitative 5. Estimated 6. Coefficient 7. Infinite
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question 20 not yet answered marked out of 1.00 flag question is meltin…
a. Physical --- ### Question 21