Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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making activity series predictions use the activity series below to pre…
B. $\text{K}_2\text{CO}_3 + \text{Na}$
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mass x gravity x height is the formula for *○ kinetic energy○ mechanica…
1. Gravitational Potential Energy 2. mass, velocity (speed) 3. Sorry, the text for the third question is incomplete. Please provide the full question details to answer it.
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a block has a mass of 23 grams and a volume of 10 cm³. using the table …
Glass
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reactions you may have noticed an (s) next to one of the products in so…
1. $\text{CdS}$ 2. $\text{Fe(OH)}_3$ 3. barium carbonate
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1. a plastic toy with a mass of 18 g occupies 9 cm3 of space. its densi…
1. 2.0 g/cm3 2. 22 cm3 3. Cannot be solved: Required reference table is not provided.
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predict the products of the double replacement reactions given. check t…
$\text{BaSO}_4 \text{(s)} + \text{MgCl}_2$ (corresponding to the fourth option)
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11. what is the correct procedure for students to follow if a chemical …
11. c) Stand back and advise the teacher of the spill. 12. d) things in an experiment that don't change 13. b) Quantitative
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reactions predict the products of the double replacement reactions give…
$\text{NaNO}_3 + \text{AgCl (s)}$
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try it reactions predict the products for the single replacement reacti…
$\text{ZnCl}_2 + \text{H}_2$
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 time re 56: glycerol boils a…
boils at a higher temperature than water, its intermolecular attractive forces must be stronger.
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 time remaini 56:31 which ter…
naturally mix without an agent, immiscible liquids do not mix on their own, and compressed molecules are unrelated to this mixing function.
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 what is produced on the top …
surface tension
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part 2: write out and balance: iron and oxygen react to form iron (iii)…
3. $160\ \text{g}$ (rounded to 2 significant figures) 4. $2.00\times10^{23}$ molecules
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 time remain 57:08 which proc…
boiling
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining 57:30 carla m…
way that causes forward motion, it does not significantly increase water molecule kinetic energy to move the boat, and soap mixes with water (it is not immiscible) rather than for…
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liquids quiz complete 1 2 3 4 5 6 7 why are liquids well suited for hyd…
The other options are incorrect: liquid density is not the key factor, liquids do not change volume easily (they are incompressible), and the number of molecules is irrelevant to …
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predict the products for the single replacement reactions given. check …
$\text{CaCl}_2 + \text{Mg}$
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liquids quiz complete 1 2 3 4 5 6 7 8 9 which type of substance is wate…
" rule. It dissolves ionic substances by hydrating ions, and also dissolves polar substances via hydrogen bonding and dipole-dipole interactions.
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining 58:54 the par…
Water particles have strong intermolecular forces.
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liquids quiz complete 1 2 3 4 5 6 7 8 9 10 what happens when a solid is…
olved solids (floating, sinking, suspending) rather than dissolution.
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temperature of chemical reactions over time 3. label the chemical react…
**Endothermic** - Citric acid and baking soda - Ammonium Chloride **Exothermic** - Calcium chloride - Sodium sulfate
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limiting reactions worksheet 3 part 1: first, write out and balance the…
Limiting reactant: $\text{P}_2\text{O}_5$; Mass of phosphoric acid: ~54 g --- ### Problem 2
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invitation if you are a dreamer, come in, if you are a dreamer, a wishe…
a. BAAABBB
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name: _________________________ percent comp. worksheet find the percen…
$\ce{Al2(SO4)3}$: Al: 15.77%, S: 28.12%, O: 56.11% $\ce{CuBr2}$: Cu: 28.45%, Br: 71.55% $\ce{NaOH}$: Na: 57.48%, O: 40.00%, H: 2.52% $\ce{(NH4)2S}$: N: 41.18%, H: 11.76%, S: 47.06…
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# 4 on the diagram fill in the phase changes in the blank provided. pha…
b. deposition
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# 3 on the diagram: fill in the phase changes in the blank provided. ph…
d. sublimation
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# 2 on the diagram: fill in the phase changes in the blank provided. ph…
a. freezing
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question 1 (1 point) # 1 on the diagram: fill in the phase changes in t…
a. freezing
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select all the correct answers. which two scientific theories were deve…
- three laws of motion - law of gravity
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20 if a bond had a electrongativity of 1.7 and higher, what type of bon…
A. ionic bond
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chemistry unit 6 stoichiometry homework / notes packet limiting reactan…
1. Limiting reactant: Magnesium ($\text{Mg}$) 2. Mass of magnesium peroxide: $\approx 27.8$ grams
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30 which contains covalent bonds? zncl₂ k₂s co₂ nacl types of chemical …
CO₂
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which of these is an empirical formula? $ce{co_{2}}$ $ce{c_{3}h_{6}}$ $…
$\text{CO}_2$
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vitamin dthe down-low on vitamin dusing vitamin d to prevent bone lossb…
1. First blank: absorb (matches the function of vitamin D for calcium; note: if restricted to the dropdown, the intended functional term aligns with enabling the body to take in c…
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1) what is the honc 1234 rule? (5pts)(put answer here.)2) explain why o…
1) The HONC 1234 rule is a bonding guideline for common organic elements: Hydrogen (H) forms 1 covalent bond, Oxygen (O) forms 2 covalent bonds, Nitrogen (N) forms 3 covalent bond…
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lets write an elegy!!!! an elegy poem is a tribute to someone who has p…
**Elegy for Grandma Elara** The porch swing still sways where you used to sit, (A) Your teacup’s faint ring on the oak still stays, (B) I trace the faint cracks where your fingers…
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stoichiometry & limiting reproblem5. $2\\ hi + ca(oh)_2 \ ightarrow cal…
2.16 grams
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4. $4fe + 3o_2 \ ightarrow 2fe_2o_3$ if 4.7 grams of $fe_2o_3$ (molar m…
Approximately 3.3 grams (or 3.28 grams) of Fe were reacted.
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18. valence electrons are found in the nucleus. true / false 19. the ma…
18. False 19. True 20. False
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elaborate on the reason why heating water up will increase the rate of …
D. The average kinetic energy of the molecules that make up the solution also increases with increasing temperature. This increase in kinetic energy allows the solvent molecules t…
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when a mixture is stirred a the rate of dissolving stops. b the rate of…
B. the rate of dissolving will increase.
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1. a solution is a mixture. the part of the solution in the greater amo…
1. B. solvent 2. A. stir the sugar in the tea 3. A. contact between the solvent and solute
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2. 17.80 grams of naoh is mixed with 15.40 grams of $h_3po_4$$3naoh_{(a…
2a. $\approx 24.3$ grams of $\text{Na}_3\text{PO}_4$ can be formed 2b. The limiting reactant is $\text{NaOH}$ 3a. $\approx 192$ grams of disulfur dichloride is produced 3b. The li…
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4. $\boldsymbol{6 na_{(s)} + fe_{2}o_{3 (s)} ightarrow 3 na_{2}o_{(s)} …
4. a. $\text{Fe}_2\text{O}_3$ b. $\text{Na}$ 5. a. $71.6\ \text{grams}$ Limiting reactant: $\text{AgNO}_3$ Excess reactant: $\text{KBr}$
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4. record the different types of evidence that indicate a chemical chan…
1. Color change (e.g., rust forming on iron, a blue solution turning clear) 2. Formation of a precipitate (a solid forming from mixing two liquids) 3. Gas production (bubbles, fiz…
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what is most closely the meaning of maneuvers in the passage below (par…
A. schemes
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10. a compound is discovered that is 64.9% carbon, 13.5% hydrogen, and …
Empirical formula: $\text{C}_4\text{H}_{10}\text{O}$ Molecular formula: $\text{C}_4\text{H}_{10}\text{O}$
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if the empirical formula is ch and the molar mass is 78 g/mol, what is …
$\text{C}_6\text{H}_6$
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practice: determining formulas part 1: determine the empirical formula,…
1. Empirical formula for magnesium-bromine compound: $\text{MgBr}_2$ 2. Empirical formula for carbon-hydrogen compound: $\text{CH}_4$
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11/02/26 q6) write short note on chemical bonding q16) give the types o…
1. **Q6**: Chemical bonding is the attractive force that holds atoms, ions, or molecules together to form stable chemical compounds, driven by interactions between valence electro…
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1. in any solution, the part in the greatest quantity or volume is call…
1. B. solvent 2. A. liquid-solid 3. gas-gas
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chapter review (continued)directions: find the mistakes in the statemen…
11. A burning candle is undergoing a chemical change. 12. Removing salt from water by heating the water until it vaporizes and leaves the salt behind is called evaporation. 13. An…
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reviewpart a. vocabulary reviewdirections: use the clues below to compl…
### Completed Crossword Answers: Across: 1. PHYSICAL 3. COMPOUND 4. HETEROGENEOUS 6. SUSPENSION 7. COLLOID 9. MIXTURE 10. SOLUTION Down: 2. HOMOGENEOUS 5. ELEMENT 8. TYNDALL 9. MA…
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lines 21-24 a. write: how is this stanza similar to stanza 1 (lines 1-4…
1. Rhyme scheme labeling (lines 21-43): Lines 21-24: A, B, A, B Lines 25-28: C, C, D, D Lines 29-32: E, F, E, F Lines 33-34: G, G Lines 35-38: H, I, H, I Lines 39-43: J, K, L, L, …
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directions: below are two sets of words. complete the second set by cho…
1. ice 2. solubility 3. condensation 4. flammable 5. air 6. iron 7. burning logs 8. wire 9. A physical change only changes a substance's physical form (no new substance is formed)…
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is a. $8g$ b. $4g$ c. $g$ d. $16g$ 10. an aeroplane gets its upward lif…
10. b. Bernoulli's principle 11. c. Kinetic energy is maximum, potential energy is minimum 12. a. $\lambda/4$ 13. a. Both A and R are true and R is the correct explanation of A. 1…
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order these compounds based on the strength of the dipole-dipole forces…
D. $\text{HCl} > \text{HBr} > \text{HI}$
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identify the correct dipole for the c$-$br bond in the lewis structure …
II. $\ce{H - \underset{\underset{H}{|}}{C} - H}$ with arrow pointing from C to Br (positive end on C, arrowhead on Br)
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which has the correct name-formula combination? answer: a chlorine pent…
C. carbon tetraiodide - $\text{CI}_4$
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what is the last portion of the electron configuration for gallium, ga?…
4p¹
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what is the noble gas electron configuration for polonium? xe 6s² 5d¹⁰ …
[Xe] 6s² 4f¹⁴ 5d¹⁰ 6p⁴
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which is the correct electron configuration for the element phosphorus?…
1s² 2s² 2p⁶ 3s² 3p³
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what element does this orbital diagram represent? na ar ne k
Na
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what element does this electron configuration represent? $kr 5s^2 4d^{1…
I. Iodine (I)
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name: daniela torres count how many atoms for each compound or molecule…
1. $\text{NaHCO}_3$: 1 Na, 1 H, 1 C, 3 O 2. $\text{Mg(OH)}_2$: 1 Mg, 2 O, 2 H 3. $2\text{H}_2\text{SO}_4$: 4 H, 2 S, 8 O 4. $\text{C}_2\text{H}_4\text{O}_2$: 2 C, 4 H, 2 O 5. $3\t…
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count how many atoms for each compound or molecule $ce{nahco_{3}}$ $na=…
1. $\text{NaHCO}_3$: 6 total atoms (1 Na, 1 H, 1 C, 3 O) 2. $\text{Mg(OH)}_2$: 5 total atoms (1 Mg, 2 O, 2 H) 3. $2\text{H}_2\text{SO}_4$: 14 total atoms (4 H, 2 S, 8 O)
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physical science eams counting atoms count how many atoms for each comp…
- $\text{NaHCO}_3$: 6 total atoms (Na=1, H=1, C=1, O=3) - $\text{C}_2\text{H}_4\text{O}_2$: 8 total atoms (C=2, H=4, O=2) - $\text{Mg(OH)}_2$: 5 total atoms (Mg=1, O=2, H=2) - $3\…
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eams counting atoms date name count how many atoms for each compound or…
1. For $\boldsymbol{\text{NaHCO}_3}$: - Sodium ($\text{Na}$): 1 atom - Hydrogen ($\text{H}$): 1 atom - Carbon ($\text{C}$): 1 atom - Oxygen ($\text{O}$): 3 atoms - Total atoms: 6 …
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physical science eams counting atoms date name count how many atoms for…
1. For $\text{NaHCO}_3$: 6 total atoms (1 Na, 1 H, 1 C, 3 O) 2. For $\text{C}_2\text{H}_4\text{O}_2$: 8 total atoms (2 C, 4 H, 2 O) ### Molecule Drawing Notes: - $\text{NaHCO}_3$ …
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ms-ess2-1 develop a model to describe the cycling of earths materials a…
6. C. It is not a mineral because it doesn't have a crystal structure. 7. C. pressure
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Question was provided via image upload.
19. $\ce{Mg(OH)2 + 2HCl -> MgCl2 + 2H2O}$; Acid-Base Neutralization 20. $\ce{Na2CO3 + 2HCl -> 2NaCl + H2O + CO2}$; Double Displacement (Gas Evolution) 21. $\ce{NH4NO2 -> N2 + 2H2O…
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9. use the following chemical equation to solve the 3 step problem and …
Balanced equation: $3\text{Mg} + \text{N}_2 ightarrow \text{Mg}_3\text{N}_2$ a. $\approx 35\ \text{g}$ (rounded to 2 significant figures) b. Completed table: | Moles Mg | Moles N₂…
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7. complete the table using the following reaction. balance the equatio…
(Problem 7 Table): | Moles Fe | Moles O₂ | Moles Fe₂O₃ | Excess Fe | Excess O₂ | Limiting Reactant | |----------|----------|-------------|-----------|-----------|-----------------…
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Question was provided via image upload.
Balanced reaction: $2\text{Na} + \text{Cl}_2 ightarrow 2\text{NaCl}$ Theoretical yield of NaCl: $57.7\ \text{g}$ Limiting reactant: $\text{Cl}_2$
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Question was provided via image upload.
Limiting Reactant: $\text{O}_2$ (Oxygen gas) Theoretical Yield: $31.4\ \text{g}$ Percent Yield: $93.9\%$ Percent Error: $6.11\%$ Grams of excess reactant left over: $14.8\ \text{g…
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a solid oxide of lead, $\text{pbo}_2(s)$, reacts with $\text{h}_2\text{…
C. The Pb in $\text{PbO}_2$ is reduced.
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photoelectron spectrum identify the element in this pes graph. calcium …
Calcium
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6. what is the maximum amount (in grams) of nacl that can be produced f…
Balanced reaction: $\boldsymbol{2Na + Cl_2 ightarrow 2NaCl}$ a. Moles of Na: $\boldsymbol{\approx 1.96\ \text{mol}}$ b. Moles of NaCl from Na: $\boldsymbol{\approx 1.96\ \text{mol…
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Question was provided via image upload.
1. Mole ratio: $N_2:O_2:NO_2 = 1:2:2$ 2. Mole ratio: $SO_2:O_2:SO_3 = 2:1:2$ 3. 18 moles 4. a. $\frac{44}{3}$ (≈14.67) moles b. $\frac{4}{3}$ (≈1.33) moles c. 0 moles 5. Limiting …
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5. how many grams of carbon dioxide should be produced if 25.0 g of oct…
Theoretical yield of $\ce{CO2}$: $31.4\ \text{g}$ Percent yield: $93.9\%$ Percent error: $6.11\%$
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molarity mastery 2020.pdf making solutions..... 6. using the steps belo…
1. (For Question 6) a. Fill flask with half the needed volume of water. b. Add calculated mass of salt to water, stir to dissolve. c. Fill flask to the marked volume line. 2. (For…
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molarity masterydiagramming the concept...1. use this diagram 2 m deter…
1. $\boldsymbol{0.5\ \text{M}}$ 2. Evaporate solvent to reduce the solution's volume to half of its original volume, or add an equal number of moles of calcium chloride to the ori…
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what is the chemical that refluxes into the esophagus, causing the burn…
Hydrochloric acid (HCl)
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write the formula for these ionic compounds: iron (ii) chloride calcium…
1. Iron (II) Chloride: $\text{FeCl}_2$ 2. Calcium Oxide: $\text{CaO}$ 3. Sodium Sulfide: $\text{Na}_2\text{S}$ 4. Aluminum Nitride: $\text{AlN}$ 5. Magnesium Oxide: $\text{MgO}$ 6…
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16. what is the formula for iron (iii) bromide?febrfebr₂febr₃fe₃br17. w…
16. $\text{FeBr}_3$ 17. $\text{CaS}$ 18. $\text{PCl}_3$ 19. $\text{C}_2\text{F}_6$ 20. Nitrate 21. Magnesium nitride 22. Barium chloride 23. Dinitrogen pentoxide 24. Sulfur trioxi…
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7. what is the charge of a potassium ion? a) +1 b) -1 c) -2 d) +2 8. wh…
7. a) +1 8. c) -2 9. b) zero 10. 3+ is the charge 11. have 8 valence electrons 12. SO₂ 13. CaCl₂ 14. Ar 15. (OH)⁻
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unit 3 practice test/study guide 1. what type of solid can conduct elec…
1. Ionic compound 2. Metal 3. Ionic compound 4. Electrons are transferred between metals and nonmetals. 5. Atoms share electrons 6. two or more metals
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question 25 of 36 the boiling point of an aqueous solution is 102.01 °c…
$-7.30^\circ\text{C}$
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question 24 of 36 > imagine two solutions with the same concentration a…
$m = 0.420$ m $T_b = 78.9$ °C
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at -13.0 °c, a common temperature for household freezers, what is the m…
3090 g (rounded to 3 significant figures)
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question 22 of 36 a solution is made by dissolving 0.735 mol of nonelec…
$T_f = 1.1^\circ\text{C}$ $T_b = 82.3^\circ\text{C}$
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which of the following phase changes is the largest decrease in entropy…
1. deposition 2. melting
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which of the following phase changes is the largest increase in entropy…
1. sublimation 2. condensation
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question 21 of 36 calculate the freezing point of a 12.25$m$ aqueous so…
$-22.79^\circ\text{C}$ (rounded to two decimal places, or $-22.8^\circ\text{C}$ for reasonable precision)
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a solution is made by mixing 38.0 ml of ethanol, $ce{c_{2}h_{6}o}$, and…
21.7 Torr
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biphenyl, $\text{c}_{12}\text{h}_{10}$, is a nonvolatile, nonionizing s…
$81.9\ \text{Torr}$
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a chemist combined chloroform (chcl₃) and acetone (c₃h₆o) to create a s…
2.71 M
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who is the limiting reactant? ______ who is the excess reactant? ______…
1. Ecuación química balanceada: $\boldsymbol{\text{SiO}_2 + 3\text{C} ightarrow \text{SiC} + 2\text{CO}}$ 2. Reactivo limitante: $\boldsymbol{\text{SiO}_2}$ (el carbono está en ex…
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when 4.74 g of a nonelectrolyte solute is dissolved in water to make 15…
concentration: $0.0520$ M moles of solute: $0.00806$ mol molar mass: $588$ g/mol
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two beakers each contain 200 ml of water. into one beaker, a student ad…
The NaCl solution will have a higher boiling point than the KCl solution.