Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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the longer the reaction time is, the ✔️ lesser the reaction rate is. re…
First blank: greater Second blank: inversely proportional (Note: The dropdown options likely include "greater" for the first blank and "inversely proportional" for the second blan…
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apply the principles from this lesson the longer the reaction time is, …
First blank: slower; Second blank: inversely related
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hypothesis 1: if you increase the temperature of a reaction, then the r…
temperatures
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assume that each tablet’s mass was 1,000 mg, and remember that you used…
Full tablet: 145 mg/L/sec Eight pieces: 173 mg/L/sec Tiny pieces: 216 mg/L/sec (Wait, but maybe the problem expects using the same formula as the left side, where for 3°C, it's 10…
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assume that each tablets mass was 1,000 mg, and remember that you used …
For \( 3^\circ\text{C} \): 36 For \( 24^\circ\text{C} \): 146 For \( 40^\circ\text{C} \): 190 For \( 65^\circ\text{C} \): 352
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section one: directions - the following sentences may have faulty paral…
1. Monica brewed espresso, steamed milk, and told jokes as she prepared Mike’s latte. - **CORRECT** 2. Natasha tried holding her breath, chewing a piece of gum, and poking her bel…
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given the following names, write the formulas 1. calcium carbonate 2. s…
1. $\boldsymbol{\text{CaCO}_3}$ 2. $\boldsymbol{\text{NaCN}}$ 3. $\boldsymbol{\text{KNO}_3}$ 4. $\boldsymbol{\text{Al(ClO}_3\text{)}_3}$ 5. $\boldsymbol{\text{BaCrO}_4}$ 6. $\bold…
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question 4 (10 points) choose the response that lists the member of eac…
D. KI, HF, and Br₂
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according to the law of conservation of mass, how much zinc was produce…
B. 50 g
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final exam - requires respondus lockdown browser + webcam page 1: page …
D. \( NH_3 \)
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question 2 (10 points) according to the vsepr model, which molecule is …
A. HCN
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look at the equations below. first, balance the equation using the mass…
### First Reaction: - Reactants: \(4\text{Na}\), \(\text{O}_2\) - Product: \(2\text{Na}_2\text{O}\) - Reactants and products mass: Same (Law of Conservation of Mass, mass of react…
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question 1 (10 points) what is the total number of electron domains aro…
E) 6
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review 1. list the charge, location, and mass of a proton, a neutron, a…
- **Proton**: Charge = $+1$, Location = Nucleus, Mass ≈ $1.6726\times10^{-27}\ \text{kg}$ (or $1\ \text{amu}$) - **Neutron**: Charge = $0$, Location = Nucleus, Mass ≈ $1.6749\time…
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before answering the questions in each square, use the margins on this …
- Define element: A pure substance consisting of only one type of atom, e.g., Hydrogen (H), Oxygen (O), Carbon (C). - Draw and label 3 elements: Draw circles (atoms) labeled H, O,…
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given the formulas, name the following compounds. 1. cuso₄ 2. kclo₃ 3. …
1. Copper(II) sulfate 2. Potassium chlorate 3. Ammonium hydroxide 4. Potassium carbonate 5. Sodium sulfate 6. Potassium acetate 7. Ammonium chloride 8. Sodium hydroxide 9. Sodium …
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1) how many moles of ca is 100g of ca?
Approximately 2.50 moles (or more precisely, approximately 2.495 moles)
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19) identify the element with the ground state electron configuration: …
Arsenic (As) ### Question 20: Label parts of \(4p^6\)
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the second part of the lab procedure focused on particle size and also …
- Amount of water: constant - Reaction rate: variable - Temperature: constant - Initial amount of tablet: constant - Particle size: variable
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13. your long - term memory is most similar to which of the following p…
D. hard - drive ### Question 14
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the first part of the lab procedure focused on temperature. there were …
- Amount of water: Constant - Reaction rate: Variable - Temperature: Variable - Initial amount of tablet: Constant - Particle size: Constant
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answer the following question in 1-2 complete sentences. what is form? …
In art, form refers to the visual structure/shape of an artwork; the four categories of form are representational, abstract, non - objective, and organic (or geometric).
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molarity practice worksheet molarity = \\frac{moles solute}{liters solu…
Approximately 2.0 M ### Problem 2:
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10. ____ are characteristics of a substance that you can see without ch…
The option "Physical Change color black" (the first option in the options column for question 13)
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complete hypothesis 2 (particle size): if you the particle size of a re…
First blank: decrease; Second blank: more
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fill in the blanks to formulate hypotheses to both parts of the lesson …
First blank: increase; Second blank: more frequent collisions (or greater kinetic energy, depending on standard curriculum phrasing, but "more frequent collisions" is a common fil…
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10. ____ are characteristics of a substance that you can see without ch…
Physical Properties color yellow ### Question 11 **Definition**: Painting paper (e.g., applying color) doesn’t change the paper’s chemical identity (it’s still paper), so it’s a p…
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type the correct answer in each box. use numerals instead of words. a n…
Table fill: 35 (for negative in organic), 60 (for positive in non - organic) Probability percentage: 91.7
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directions: read each question, circle the correct answer, and then fin…
1. Circle "Physical Change color yellow" 2. Circle "Chemical Property color black" 3. Circle "Physical Properties color red" 4. Circle "Change in temperature color blue" 5. Circle…
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9. represent the following atoms using symbolic notation: nitrogen – 15…
Nitrogen - 15: \( \boldsymbol{_7^{15}\text{N}} \) Argon (most common isotope): \( \boldsymbol{_{18}^{40}\text{Ar}} \) Potassium - 41: \( \boldsymbol{_{19}^{41}\text{K}} \)
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question 4 if the half - life of phosphorus - 32 is 14.3 days, how much…
6.25 mg
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11. danaisha does all her grocery shopping at organic markets and has a…
C. Both, because needs vs wants are determined on an individual basis
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name ______________ date ______________ sort it: physical vs. chemical …
### Physical Changes in Matter - Water Freezing - Ice Melting - Boiling Water - Breaking Glass - Crushing a Can - Chopping Wood - Mixing Sugar and Water ### Chemical Changes in Ma…
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levels circle the larger atom in each pair. a. k or na b. f or be c. br…
a. K b. Be c. V d. Mg e. Kr f. Cs
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chemistry semester 1 – honors review name 6. how did new evidence suppo…
a. Discovery of electrons (Thomson’s experiment) showed atoms contain subatomic particles (not indivisible). b. Rutherford’s gold foil experiment revealed a dense, positively char…
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which literary techniques does steinbeck use to develop the characters …
A. Symbolism, C. Foreshadowing
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the figure shows the relationship between changes in ocean carbon dioxi…
C. There is an inverse relationship, as the dissolved CO increases, the pH decreases.
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sustainable use is often defined as the use of natural resources at a r…
A. Cover crops like clover are planted on farmland to increase nitrogen in soils and reduce the need of chemical fertilizers.
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the use of jargon in the excerpt by sorting the words into the appropri…
Jargon terms: air lock, decon cycle, hot side; Non - jargon terms: far door, shower
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name lewis dot structures savvis chemistry corner 1. use the lewis dot …
To solve these chemistry - related tasks (drawing Lewis dot structures, counting atoms, constructing molecules): 1. **Lewis Dot Structures and Atom Counts**: - For \( \text{SiH}_4…
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question 3. the cation cu²⁺ is named using the as
First dropdown: Stock system (Roman numerals) Second dropdown: copper(II) ion
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question 2. drag the correct name of each cation or anion to match its …
a. \( \text{Na}^+ \): Sodium ion (or Sodium(I) ion) b. \( \text{Cl}^- \): Chloride ion c. \( \text{Mn}^{2+} \): Manganese(II) ion d. \( \text{Mn}^{4+} \): Manganese(IV) ion e. \( …
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how can you differentiate elements from compounds? how can you differen…
Elements combine chemically to form compounds. Compounds have fixed compositions; mixtures have variable ones. Heterogeneous mixtures have visibly distinct parts; solutions are un…
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state the type of substance and the oxidation state of a calcium ion. c…
cation +2 charge
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what information would allow you to determine whether two atoms are of …
The number of protons in their nuclei
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24 2+ mg 12 the substance displayed is a cation negative ion neutral at…
A. Cation
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when naming the compound agc₂h₃o₂ it is called silver acetate, because …
B. it is called Silver(I) Acetate, because Silver is a B-Metal
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the correct formula for zirconium(iv) carbonate is__________ and the ox…
B. $\ce{Zr(CO_3)_2}$; +4
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when naming the compound ba₃(po₄)₂ it is called barium phosphate becaus…
C. it is called Barium Phosphate because Ba is an A - Metal (assuming the third option is labeled C; if the original options had labels like A, B, C, D with the third being C, the…
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classify the compound n₂p₅. inorganic, binary, ionic; organic, binary, …
Inorganic, Binary, Molecular
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24/30 when naming the compound n₂p₅, the naming rule used for the \x\ p…
B. Use Prefixes, because N is a nonmetal
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question 2. the diagram below illustrates the formation of an ionic bon…
For ion charges: Al ions get \( 3^+ \), O ions get \( 2^- \). For the chemical formula: \( \text{Al}_2\text{O}_3 \)
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15/30 name the compound (nh₄)₂cro₄ type your answer...
ammonium chromate
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c) sodium and oxygen. d) magnesium and oxygen. e) barium and chlorine. …
c) $\boldsymbol{Na_2O}$ d) $\boldsymbol{MgO}$ e) $\boldsymbol{BaCl_2}$ f) $\boldsymbol{Ca_3N_2}$ g) $\boldsymbol{Al_2S_3}$ h) $\boldsymbol{CaF_2}$ i) $\boldsymbol{AlBr_3}$ j) $\bo…
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modified true/false: if the statement is true, write true in the blank.…
\(0.30 \, N\) ### Problem 8:
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7/21 multiply the following data: (3.4 × 10⁵ g) (1.20 × 10⁻³ g) report …
\( 4.1\times 10^{2}\text{ g}^2 \)
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7) ______ naoh → ______ na₂o + ______ h₂o | | reactants | products | |-…
7) 2 NaOH → 1 \( Na_2O \) + 1 \( H_2O \) Reactants: Na=2, O=2, H=2; Products: Na=2, O=2, H=2 8) 2 \( Al_2O_3 \) → 4 Al + 3 \( O_2 \) Reactants: Al=4, O=6; Products: Al=4, O=6 9) 1…
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it is known that compounds called chlorofluorocarbons (cfcs) e.g. cfcl₃…
\( O_3 + O ightarrow 2O_2 \) (or if we include the \( CFCl_3 \) decomposition, but the main ozone - related overall reaction from the Cl - catalyzed steps is \( O_3+O ightarrow 2O…
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procedure part 1: determining δh of reaction (2) 1. read the procedure …
Natural Science - Chemistry
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a a flame with excess oxygen, making it hotter and more forceful b a ba…
A. a flame with excess oxygen, making it hotter and more forceful
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question 28 aluminum metal (1.63 g) reacts with 1.60 l of chlorine gas …
Balanced equation: $\boldsymbol{2\ce{Al}(s) + 3\ce{Cl2}(g) ightarrow 2\ce{AlCl3}(s)}$ Percent yield: $\boldsymbol{67.6\%}$ (or ~68%)
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question 26 in a process to vulcanize rubber, a process that makes rubb…
### Question 26: - Limiting Reactant: \( \boldsymbol{Cl_2} \) - Moles of \( S_2Cl_2 \): \( \boldsymbol{5.01 \, \text{mol}} \) ### Question 27: - Grams of \( CaCl_2 \): \( \boldsym…
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question 23 consider the following reaction; mg + f₂ → mgf₂ how many gr…
\( \approx 22.3 \, \text{g} \) (3 sig figs) ### Question 24
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in the \before reaction\ box, there are 3 molecules of elemental nitrog…
The theoretical yield is 2 molecules of \( \text{N}_2\text{O}_3 \). (The option: "The theoretical yield is 2 molecules of \( \text{N}_2\text{O}_3 \).")
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nitrogen and oxygen gases react to form dinitrogen oxide gas (n₂o). wha…
The volume of $O_2$ needed is $\boxed{3.92}$ L. (Note: First, we balanced the equation as $2N_2 + O_2 ightarrow 2N_2O$, then used the volume ratio from the balanced equation (1 mo…
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gas stoichiometry for these problems, remember that the volumes are pro…
Oxygen gas: \(3.5\space L\) Hydrogen Fluoride: \(14\space L\)
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gas stoichiometry for these problems, remember that the volumes are pro…
\(7\) liters
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answer the following questions related to a reaction between hbr and ni…
$2HBr(aq) + Ni(OH)_2(s) ightarrow NiBr_2(aq) + 2H_2O(l)$
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answer the following questions related to a reaction between hbr and ni…
D. Strong acid ### Part 2 (Hydrogen gas volume calculation)
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overall question: part 1 of 6 convert 92.4 grams of kf to grams of ag₃n…
s: - Molar mass of KF: \( \boldsymbol{58.10} \) g/mol - Molar mass of \( Ag_3N \): \( \boldsymbol{337.62} \) g/mol - Moles of \( CaCl_2 \): \( \boldsymbol{0.00113} \) mol (or more…
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a. write the balanced equation, including phase symbols, for the reacti…
\boxed{2.581 \, mL} (or 2.58 mL, depending on significant figures)
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a. write the balanced equation, including phase symbols, for the reacti…
$3HI(aq) + Mn(OH)_3(s) ightarrow MnI_3(aq) + 3H_2O(l)$
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question 9 0/1 pt 5 19 details when equal masses of the following compo…
b. Glucose, \( \text{C}_6\text{H}_{12}\text{O}_6 \)
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question 9 0/1 pt 5 19 details when equal masses of the following compo…
b. Glucose, \( \text{C}_6\text{H}_{12}\text{O}_6 \)
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when equal masses of the following compounds undergoes complete combust…
\(307.4\) (or approximate value based on calculation precision)
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given the following equation: 2 kclo₃ → 2 kcl + 3 o₂ how many moles of …
75 ### Question 7 (Grams of \( C_4H_{10} \) needed for \( CO_2 \) production)
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question 3 extra credit what is the mass of sodium chloride (salt) form…
52.7 grams (unit: grams) ### Question 4
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a piece of magnesium metal is placed in a jar filled with hydrochloric …
does not change ### Question 2
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what else is produced during the combustion of butane, c₄h₁₀? 2c₄h₁₀ + …
\(CO_2\) (the option with \(CO_2\))
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which clue can be used to identify a chemical reaction as a replacement…
A. The reaction has two reactants with ions that seem to switch places.
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a chemical reaction that has the general formula of ab + c → cb + a is …
single - replacement (or displacement)
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which is produced in a synthesis reaction? ○ a single element ○ a singl…
a single compound
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what are the half reactions for the single displacement reaction of: mg…
The correct half - reactions are: - \( \text{Mg}_{(s)}\ ==>\ \text{Mg}^{2+}_{(aq)}\ +\ 2e^- \) - \( 2e^-\ +\ 2\text{H}^+_{(aq)}\ ==>\ \text{H}_2_{(g)} \)
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what else is produced when sodium carbonate decomposes? na₂co₃ → na₂o +
$\ce{CO2}$
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question 1 in the reaction: ca(s) + h₂o(l) ---> ca(oh)₂(s) + h₂(g) what…
C. Water is the oxidizing agent, E. Ca is the reducing agent (assuming options are labeled as: A. Ca is the oxidizing agent, B. Hydrogen is the oxidizing agent, C. Water is the ox…
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question 1 in the reaction: ca₍ₛ₎ + h₂o₍ₗ₎ ==> ca(oh)₂₍ₛ₎ + h₂₍₉₎ what …
The correct options are: - hydrogen is reduced - Ca is oxidized
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which three types of reactions yield a product that is a chemically bon…
D. oxidation, synthesis, polymerization
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question 1 select the redox reactions. □ zn₍ₛ₎ + 2agno₃₍ₐq₎ ==> zn(no₃)…
All four reactions are redox reactions: - $\boldsymbol{\ce{Zn_{(s)} + 2AgNO_{3(aq)} -> Zn(NO_{3})_{2} + 2Ag_{(s)}}}$ (redox: Zn oxidized, Ag reduced) - $\boldsymbol{\ce{H_{2(g)} +…
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what else is produced during the combustion of propane, c₃h₈? c₃h₈ + 5o…
A. \( \text{H}_2\text{O} \)
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question 1 select the redox reactions. □ zn₍ₛ₎ + 2agno₃₍ₐq₎ ==> zn(no₃)…
All four reactions are redox reactions. So the correct checkboxes are for: - $\boldsymbol{\ce{Zn_{(s)} + 2AgNO_{3(aq)} -> Zn(NO_{3})_{2} + 2Ag_{(s)}}}$ - $\boldsymbol{\ce{H_{2(g)}…
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rosa was looking for patterns to help predict the products of chemical …
\(2\text{LiCl} + 3\text{O}_2\) (corresponding to the first option: \(2\text{LiCl} + 3\text{O}_2\))
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question 1 what is the oxidation state of sulfur in the sulfite ion? ○ …
4+
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when explaining chemical reactions to a friend, brianna models a reacti…
A. synthesis
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which type of reaction is nacl + agno₃ → nano₃ + agcl? ○ synthesis ○ de…
replacement
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what is the net ionic equation for the reaction of na₂co₃ and hcl in wa…
\( 2\text{H}^+_{(aq)} + \text{CO}_3^{2-}_{(aq)} ==> \text{CO}_{2(g)} + \text{H}_2\text{O}_{(l)} \) (the third option)
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question 1 what are the spectator ions in the reaction of na₂co₃ and hc…
The spectator ions are $\ce{Na^{+}}$ (sodium ion) and $\ce{Cl^{-}}$ (chloride ion). So the correct options are: $\ce{Na^{+}}$ (the option with $\ce{Na^{+}}$) and $\ce{Cl^{-}}$ (th…
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question 1 what is the complete ionic equation for the reaction of na₂c…
The correct option is: \( 2\text{Na}^+_{(aq)} + \text{CO}_3^{2-}_{(aq)} + 2\text{H}^+_{(aq)} + 2\text{Cl}^-_{(aq)} ==> 2\text{Na}^+_{(aq)} + 2\text{Cl}^-_{(aq)} + \text{CO}_{2(g)}…
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question 1 select all the product combinations that will react in a dou…
The product combinations that react in a double displacement reaction are: - \( \boldsymbol{HCl} \) and \( \boldsymbol{Na_2C_2O_4} \) (reacts to form a weak acid or gas) - \( \bol…
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metal oxidation reaction lithium li(s) —→ li⁺(aq) + e⁻ potassium k(s) —…
The reactant combinations that react spontaneously are: - Zn and \( \text{CuSO}_4 \) - Al and \( \text{HgCl}_2 \) - Lead and hydrobromic acid (So check the boxes for these three o…
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question 1 indicate which reactants will result in an neutralization re…
\( \text{H}_2\text{SO}_4 \) and \( \text{Sr(OH)}_2 \), \( \text{NaOH} \) and \( \text{NH}_4\text{Cl} \), \( \text{HCl} \) and \( \text{NH}_4\text{OH} \) (the check - boxes for the…