Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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soot results from burning organic compounds. soot is an example of a a …
A. a primary pollutant
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ions in polar solvents quick check why is water considered the universa…
Water dissolves more substances than any other solvent
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after which action would the concentration of a solution remain constan…
removing solution from the container
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solutes and solvents which statement is the best explanation for the gr…
B. As temperature rises, gas particles are moving faster and may leave the solution
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which option is a microscopic property that helps determine whether or …
polarity
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solutes and solvents quick check which substance is an example of a non…
vegetable oil
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write the correct name for each of these compounds: 12. fe(oh)₂ 13. (nh…
Let's solve the naming of these chemical compounds one by one (we'll do a few as examples, and you can follow the same rules for others): ### Compound 22: $\ce{Ag3PO4}$ # Explanat…
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write the correct name for each of these compounds: 12. fe(oh)₂ 13. (nh…
Iron(II) hydroxide ### 13. $\boldsymbol{\ce{(NH4)3PO4}}$
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write the correct name for each of these compounds: 12. fe(oh)₂ 13. (nh…
Iron(II) hydroxide ### Question 13: $\boldsymbol{(NH_4)_3PO_4}$
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covalent compounds name of covalent compound | formula of covalent comp…
To solve for the formulas and names of covalent compounds, we use the rules for naming covalent compounds (prefixes: mono-, di-, tri-, tetra-, penta-, etc., to indicate the number…
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binary ionic compounds name of ionic compound | formula of ionic compou…
To solve for the formulas of binary ionic compounds (and vice versa), we use the principle of charge balance: the total positive charge from cations equals the total negative char…
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which statement correctly compares the ph of water to that of other sub…
The option with the statement "The pH of water is neutral; it is higher than the pH of acids and lower than the pH of bases" (the second option in the list)
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practice word equations: name each of the compounds under the question.…
s: ### 1. Balanced Equation: \( \boldsymbol{2\text{NaCl}(\text{s}) + \text{F}_2(\text{g}) = 2\text{NaF}(\text{s}) + \text{Cl}_2(\text{g})} \) ### 2. Balanced Equation: \( \boldsym…
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14. ____ k + ____ mgbr → ____ kbr + ____ mg
The coefficients are \( \boldsymbol{1} \) (for K), \( \boldsymbol{1} \) (for MgBr), \( \boldsymbol{1} \) (for KBr), and \( \boldsymbol{1} \) (for Mg) (assuming \( \text{MgBr} \) i…
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9. \\underline{\\quad\\quad} fecl₃ + \\underline{\\quad\\quad} naoh \ i…
1, 3, 1, 3 ### Problem 10
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biomass energy can be a sustainable carbon - neutral source of energy. …
We burn it (combustion) or chemically convert it to biofuel.
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practice word equations: name each of the compounds under the question.…
2, 2, 3 ### Problem 5:
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11 classify the following ions as monatomic or polyatomic. a: cl⁻, b: c…
- A. \( \text{Cl}^- \): monatomic - B. \( \text{Ca}^{+2} \): monatomic - C. \( \text{CO}_3^{-2} \): polyatomic - D. \( \text{Al}^{+3} \): monatomic - E. \( \text{OH}^- \): polyato…
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10 the name for $h_2c_2o_4$ is
oxalic acid (or ethanedioic acid)
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9 the name for h₃n is
ammonia (or trihydrogen nitride)
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the formula for hydro selenic acid is
$\ce{H_2Se}$
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classify the following as ionic or covalent compounds. a \\(\\ce{p2o5}\…
To classify compounds as ionic or covalent, we use the following rules: - **Ionic compounds**: Form between a metal (or polyatomic cation) and a non - metal (or polyatomic anion),…
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6 the formula for lithium carbonate is
\( \text{Li}_2\text{CO}_3 \)
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comparing carbon accumulation in tilled and no - till agricultural soil…
s: 1. Native grassland: $396\ \text{g N m}^{-2}$, Tilled farmland: $312\ \text{g N m}^{-2}$, No - till farmland: $474\ \text{g N m}^{-2}$ 2. Tilled farmland: ~78.79%, No - till fa…
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the correct formula for iron ( ii) phosphide is
$\boldsymbol{Fe_3P_2}$
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the correct name for $mg(clo)_2$ is *** if a parentheses is needed, lea…
Magnesium hypochlorite
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24. give one example of a physical change. 25. give one example of a ch…
Melting ice (other examples like freezing water, dissolving sugar in water, breaking a glass are also valid) ### Question 25
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21. one example of a chemical change is ______ a. burning wood b. crush…
a. Burning wood ### Question 22
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the ions formed when $\\ce{ch_{3}oh}$ dissociates in water are
Methanol dissociates only very slightly in water, forming methoxide ions ($\text{CH}_3\text{O}^-$) and hydronium ions ($\text{H}_3\text{O}^+$) (or equivalently, hydrogen ions $\te…
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the table shows the number of students in each grade at prairie middle …
80
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ionic bonding - problems which of the following could form an ionic com…
A. $\text{Na}^+$ and $\text{F}^-$ C. $\text{Cl}^-$ and $\text{K}^+$
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the percent by mass of methanol (molar mass = 32.04 g/mol) in an aqueou…
$\approx 28.0\ \text{mol/kg}$
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the sentence below is a word equation that describes a chemical reactio…
The balanced chemical equation is $\boldsymbol{2Fe + N_2 = 2FeN}$
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potassium chloride and fluorine undergo a single replacement reaction. …
C. KF and \( \text{Cl}_2 \) (assuming the third option is labeled C, with the text "KF and \( \text{Cl}_2 \)")
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pper(ii) hydroxide and sodium phosphate undergo a double replacement re…
E. $\ce{Cu3(PO4)2}$ and $\ce{NaOH}$ (assuming the last option is E, as per the options: the last option is $\ce{Cu3(PO4)2}$ and $\ce{NaOH}$)
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ammonia (nh₃) decomposes into its elements. predict the formulae of the…
A. $\ce{N_2}$ and $\ce{H_2}$
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ammonia ($nh_3$) decomposes into its elements. predict the formulae of …
A. $\ce{N_2}$ and $\ce{H_2}$
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propane gas - $\\ce{c3h8}$ - undergoes combustion. predict the formulae…
C. \( \text{CO}_2 \) and \( \text{H}_2\text{O} \)
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potassium iodide and lead(ii) nitrate undergo a double replacement reac…
C. \(KNO_3\) and \(PbI_2\)
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aluminum and copper(i) chloride undergoes a single replacement reaction…
E. Cu and $AlCl_{3}$
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draw the lewis dot structure for the following: sih₄\thcl mgcl₂\tal₂o₃ …
### 1. $\boldsymbol{\ce{SiH4}}$ #### Step 1: Determine valence electrons Si (Group 14) has 4 valence electrons; each H (Group 1) has 1, so total: $4 + 4(1) = 8$. #### Step 2: Arra…
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ionic vs. covalent review properties\tionic\tcovalent made with: electr…
To complete the "Ionic vs. Covalent Review" table, we analyze each property: ### 1. **Made with:** - **Ionic:** Metal + Non - metal (or polyatomic ion). Ionic bonds form between a…
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name date: per more lewis structure practice!!! formula name before aft…
To determine the correct Lewis structures or complete the table, we analyze each compound: ### 1. \( \boldsymbol{CS_2} \) (Carbon disulfide) - **Valence electrons**: \( C \) (4) +…
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name maddu beckman date: 1/... per __ more lewis structure practice!!! …
To determine the missing names and complete Lewis structures, we analyze each compound: ### 1. $\boldsymbol{H_2O}$ (Water) - **Name**: Water (common name) or Dihydrogen monoxide (…
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chemistry: ionic (binary, polyatomic, transition metals) and covalent f…
Formula: \(NaOH\), Molar Mass: \(40.00\) g/mol ### Problem 2: Tetraphosphorus Decoxide
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#6-10: write the formulas, predict and balance the equation 6. zinc + c…
s: 6. $\boldsymbol{\text{Zn} + \text{CaSO}_4 ightarrow\text{No Reaction}}$ 7. $\boldsymbol{\text{KNO}_3+\text{Al(ClO}_3\text{)}_3 ightarrow\text{No Reaction}}$ 8. $\boldsymbol{2(\…
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ws 6.7 - chemistry problems #1-5: write the formulas and balance the eq…
\( 4P + 5O_2 ightarrow 2P_2O_5 \) ### Problem 2: Bromine Gas + Iron → Iron (III) Bromide
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3. rivers carry tons of tiny rock fragments called sediments into the o…
After a few million years, the sediments carried by rivers into the ocean will accumulate on the ocean floor. Over time, due to pressure from overlying layers and chemical cementa…
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some n₂ gas is mixed with some o₂ gas, and the sketch below shows a rep…
- Mole fraction of \( \text{N}_2 \): \( \approx 0.111 \), Mole fraction of \( \text{O}_2 \): \( \approx 0.889 \) - Partial pressure of \( \text{N}_2 \): \( \approx 66.7 \) torr, P…
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multiple choice question when comparing two full 1 liter bottles of sol…
A. 5% glucose solution
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multiple choice question which of the following affect(s) the osmotic p…
B. The temperature of the solution, D. The number (concentration) of solute particles it contains
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multiple choice question imagine you have solute molecules at a very hi…
C. Solute molecules will spread out evenly reaching equilibrium.
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multiple choice question a concentration gradient exists in a solution …
not the same everywhere.
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multiple choice question two solutions are made by mixing sugar and eno…
The 10% sugar solution
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question 1 1 pts one molecule of oxygen gas contains: a nonpolar covale…
A. a nonpolar covalent bond
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multiple choice question the difference between the structure of satura…
D. saturated fats contain single bonds only between their carbon atoms (Note: Assuming the options are labeled A, B, C, D with the last option being D. If the original labeling wa…
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Question was provided via image upload.
\( 0.5 \) ### Question 7
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assignment 4: write the formulas for these ionic compounds: 1. copper (…
1. $\text{CuOH}$ 2. $\text{Na}_2\text{SO}_4$ 3. $\text{Mg(CH}_3\text{COO)}_2$ 4. $\text{(NH}_4\text{)}_3\text{PO}_4$ 5. $\text{Al}_2\text{(CO}_3\text{)}_3$ 6. $\text{KCN}$ 7. Silv…
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Question was provided via image upload.
\( 1.5055 \times 10^{23} \) (or \( 1.5 \times 10^{23} \)) atoms ### 2)
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3. potassium and sulfur - potassium charge: ______ - sulfur charge: ___…
### 3. Potassium and Sulfur - Potassium charge: $+1$ - Sulfur charge: $-2$ - Final formula: $\text{K}_2\text{S}$ ### Section E 10. Aluminum + Chlorine - Formula: $\text{AlCl}_3$ -…
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using your science notebook and interactive word wall, review what you …
By comparing structure (packing/order), shape (definite vs. adaptive), kinetic energy (motion intensity), and volume (definite vs. expandable) of atoms/molecules: - Solids: Closel…
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5 calcium fluoride 6 lithium oxide explain: choose one compound above a…
1. Calcium fluoride formula: $\text{CaF}_2$ 2. Explanation: Calcium forms a +2 cation ($\text{Ca}^{2+}$), fluorine forms a -1 anion ($\text{F}^-$). To achieve a neutral compound (…
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5 calcium fluoride 6 lithium oxide explain: choose one compound above a…
### Top Compounds & Explanation: 5. Calcium fluoride: $\text{CaF}_2$ 6. Lithium oxide: $\text{Li}_2\text{O}$
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1. a teacher has given a student a white powder sample and asks her to …
\( \approx 60.0 \, \text{g} \) ### Problem 2
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2. a chemistry instructor provides a student with a clear crystalline s…
$\approx 161\ \text{g}$ ### Problem 3
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any characteristic of a substance, such as flammability, that can be ob…
A. Chemical Property
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homogeneous mixture that remains constantly and uni - formally mixed an…
B. Solution ### Second Question (Tendency for light to scatter...):
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any characteristic of a material, such as size or shape, that can be ob…
C. Physical Property
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substance containing two or more components that are blended uniformly …
A. Homogeneous Mixture ### Second Question
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mixture whose particles never settle * colloid suspension law of conser…
A. Colloid ### Second Question (Substance with atoms that are all alike)
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process that can separate two substances in a mixture by evaporating a …
C. Distillation ### Second Question:
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any change in size, shape, or state of matter in which the identity of …
D. Physical Change ### Second Question:
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substance in which the atoms of two or more elements are combined in a …
C. Compound
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directions: for the following questions, choose the best answer or resp…
D. The beauty of winter creates calm. ### Question 2 (Part B)
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7. what does it mean for an ionic compound to be eutral overall\? part …
### Question 7: An ionic compound is "neutral overall" when the total positive charge from its cations is equal to the total negative charge from its anions, resulting in a net ch…
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37) 16 the reaction between hydrogen and oxygen releases 486 kj/mol of …
C 498 kJ/mol ### Question 38
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it is not enough to simply purchase foods that are high in complex carb…
prepared in a way that preserves nutrients
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multiple choice question complex cognitive structures that organize inf…
B. schemes
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glycerol boils at a higher temperature than water. what does this indic…
C. They are stronger than those in water
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valerie wants to examine the properties of a thick liquid but is findin…
B. applying heat to the liquid
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7. match the following structures with their name. a. b. h o h h h-c-c …
aldehyde (carbonyl): A. $\ce{CH3CHO}$ ketone: B. $\ce{CH3COCH3}$ carboxyl: C. $\ce{CH3COOH}$ amine: D. $\ce{CH3NH2}$
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melting can be best described as a process in which molecules lose kine…
D. gain enough kinetic energy to get past each other. (Assuming the last option is labeled D; if the original labels differ, adjust the identifier, e.g., if the last option is the…
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which molecules would most likely cause a liquid to have the lowest vis…
B. small, nonpolar molecules
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which process most likely takes place when the kinetic energy of molecu…
boiling
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what happens when a solid is dissolved into a liquid? solid particles f…
C. Solid particles become evenly dispersed among liquid particles.
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6. match the following structures with their name: a. b. h h h-c-n h-c-…
amine: A. $\ce{H3C-NH2}$ (structure A) sulhydryl: B. $\ce{H3C-SH}$ (structure B) aldehyde: C. $\ce{H3CH2-CHO}$ (structure C) phosphate: D. $\ce{H3C-O-PO3^{2-}}$ (structure D)
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5. match the structures with there name a. —oh c. —nh₂ b. —c—o—h d. — s…
hydroxyl group: A. —OH carboxyl group: B. $\boldsymbol{-\text{C}(=\text{O})-\text{O}-\text{H}}$ amine group: C. —NH₂ sulfhydryl group: D. —SH
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4. what is the structure? ho—c(=o)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)…
fatty acid
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rare earth elements replace each question with a full sentence answer t…
There are 17 Rare Earth elements (15 lanthanides plus scandium and yttrium). ### Question 2 (c):
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noble gases replace each question with a full sentence answer the quest…
The group number of noble gases is 18. ### 2.
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nonmetals replace each question with a full sentence answer the questio…
Nonmetals are found in group numbers 14, 15, 16, 17, and 18 of the periodic table. ### 2.
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data was collected for a sample of organic snacks. the amount of sugar …
\(n = 42\)
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use your understanding of the ideal gas law to identify the correct rel…
- Pressure: Directly proportional to temperature and moles, inversely proportional to volume (exact wording depends on dropdown options, e.g., if options are "directly proportiona…
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what information does the coefficient tell us in a chemical formula? am…
B. Amount of molecules
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mg+h2o → mg(oh)2+h2 our group can carry an oxidative state of +2 and ca…
Alkaline Earth Metals
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which of the following groups of elements contain the most reactive met…
transition elements
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what information does the subscript tell us in a chemical formula? unt …
Amount of elements
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how many protons does lithium have? 3 7 4
3
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side to side rows on the periodic table are periods groups
periods
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balance this equation: mgcl₂ --> mg₄+ cl₂ 4mgcl₂ --> mg₄+ 4cl₂ it’s alr…
A. $4\text{MgCl}_2 ightarrow \text{Mg}_4+ 4\text{Cl}_2$