Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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all my great excuses i started on my homework but my pen ran out of ink…
ABAB
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express your answer in kilograms per cubic meter. view available hint(s…
$5.23 \times 10^{3}$
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mr. brown the circus clown mr. brown, the circus clown puts his clothes…
AABB
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name unit 8 mixed practice complete each step for all of the following …
### Question 1: Dicarbon hexahydride reacts with oxygen gas to produce carbon dioxide and water #### Step 1: Translate to chemical equation Dicarbon hexahydride is \( C_2H_6 \), o…
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rhyme scheme directions 1. read the following poems. 2. for each poem, …
## Mr. Brown the Circus Clown Mr. Brown, the circus clown: A puts his clothes on upside down: B He wears his hat upon his toes: A and socks and shoes upon his nose: B Rhyme scheme…
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rhyme scheme directions 1. read the following poems. 2. for each poem, …
Line 1: A Line 2: B Line 3: A Line 4: B Rhyme scheme: ABAB
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my cat #2 my cat is nice. my cat is fat. my cat likes mi i like my cat.…
Rhyme scheme: AB CB
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rhyme scheme directions 1. read the following poems. 2. for each poem, …
- My Cat #1 Rhyme Scheme: AABB - My Cat #2 Rhyme Scheme: AB CB
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rhyme scheme directions 1. read the following poems. 2. for each poem, …
### My Cat #1 - My cat is nice.: A - My cat likes mice.: A - My cat is fat.: B - I like my cat.: B - Rhyme scheme: AABB ### My Cat #2 - My cat is nice.: A - My cat is fat.: B - My…
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in this experiment, you will first change the temperature of the water …
How do water temperature and antacid tablet size affect the time required for an antacid tablet to dissolve?
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any molecules with a ph from 7 to 14
Bases (or alkaline substances)
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the only molecule that has a ph of 7
Water (H₂O)
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the only molecule that has a ph of 7
Water (H₂O)
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this passage describes a chemical reaction. read the passage. then, fol…
product
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a chemist carefully measures the amount of heat needed to raise the tem…
\( 1.9\space J\cdot g^{-1}\cdot K^{-1} \)
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an element with mass 730 grams decays by 28.8% per minute. how much of …
22.0 grams
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22. what evidence best supports the presence of atmospheric oxygen 2.7 …
A. layered iron rust in rocks
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when the elements copper (cu) and oxygen (o) chemically combine, they f…
a compound
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this image is a model of... a homogenous mixture a heterogeneous mixtur…
D. an element (assuming the green option is labeled D, if the labels were A: a homogeneous mixture, B: a heterogeneous mixture, C: a compound, D: an element)
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which of the following is an example of the formation of a mixture? rus…
The option with "Sugar crystals dissolving in water" (the blue - colored option with the text "Sugar crystals dissolving in water")
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question 4 (1 point) if a cosmetologist observes that a clients face ha…
c. triangular ### Question 5
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the image below is an example of a molecule an atom a homogeneous mixtu…
a homogeneous mixture
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which of the following explains why saltwater is considered a mixture? …
The option with the text "It is composed of two or more substances and retains their own chemical properties." (the yellow - colored box)
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which of the following is an example of a container filled with a pure …
A. A balloon filled with helium.
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the image below is an example of a homogeneous mixture an element a het…
a heterogeneous mixture
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which statement identifies why oxygen is classified as a pure substance…
The correct statement is the green - colored one: "Oxygen contains only one substance, but air contains several substances." (Assuming the green option is, for example, Option A, …
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three students are working with different substances to measure the che…
Chao should change the temperature, Mia should adjust the pressure, and Ezra should increase the surface area.
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when the elements copper (cu) and oxygen (o) chemically combine, they f…
a compound
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this picture is a model of a... element compound heterogeneous mixture …
heterogeneous mixture (the orange card option: heterogeneous mixture)
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the chemical equation shown below represents a reaction that produces f…
The substance classified as an element is \( \text{H}_2 \) (Hydrogen gas). If we consider the options as presented (assuming the choices are \( \text{CO}_2 \), \( \text{H}_2 \), \…
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when electricity passes through water, hydrogen and oxygen are produced…
The green - colored option (Water-- > Compound, Hydrogen-- > Element, Oxygen-- > Element)
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the chemical symbol for an element is always represented by only 1 lett…
False
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valence electrons are the electrons in the outer most energy level all …
the electrons in the outer most energy level
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the number of valence electrons ------- by 1 as you move across the per…
increases
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atomic mass equals the combined number of protons and electrons electro…
Protons and Neutrons (the orange - colored option with text "Protons and Neutrons")
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what is a motion in limine? a. a motion to dismiss the case b. the move…
c. A pretrial motion for the purpose of excluding certain evidence
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e) 9.0h + hbr3 9. mark and karen are carrying out a science project on …
When acid is added, $\ce{HCO3^-}$ reacts with added $\ce{H+}$ to form $\ce{H2CO3}$, preventing a large pH drop. The buffer equilibrium shifts left to consume excess $\ce{H+}$. ###…
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investigating chemical reactions: energy changes in substances when dif…
chemical reaction ### Question 2
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practice problems 1 the height of water in a bathtub, w, is a function …
A - 2, B - 4, C - 3, D - 1 ### Problem 2a
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akia is balancing the equation na + h₂o → naoh + h₂. he tries to find t…
by counting each individual atom and making sure the number of each kind of atom is the same in the reactants and the products
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which statement correctly describes why a compound is a pure substance?…
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.
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select the correct answer. which of the following is a correctly balanc…
B. $2\text{HgO} ightarrow 2\text{Hg} + \text{O}_2$
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write the correct chemical formula of polyatomic compounds covalent com…
### Part 1: Naming Covalent Compounds (Question 1) For covalent compounds, we use prefixes to indicate the number of atoms of each element. The prefixes are: 1 - mono, 2 - di, 3 -…
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part ii: lab questions 1. graph the following data on a piece of graph …
The graph is drawn by following the above steps, with properly labeled axes, appropriate scales, and two solubility curves (one for Sodium Chloride and one for Copper Sulfate) dra…
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research: real world examples research 3 examples of each change in sta…
To complete this task, we will provide 3 examples for each state change (melting, freezing, condensation, sublimation) and their explanations: ### MELTING 1. **Example 1: Candle W…
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changes in state: vocabulary matching match the word to the definition …
- GASES: No definite volume and no definite shape. - TEMPERATURE: The average kinetic energy of particles in a substance. - KINETIC ENERGY: Energy of motion. - VAPORIZATION: Liqui…
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7. elements review: fill in the chart below for some of the compounds o…
To solve this, we analyze each compound: ### Example: NaCl ## Step 1: Count Na atoms In \( \text{NaCl} \), there is 1 Na atom. ## Step 2: Count Cl atoms In \( \text{NaCl} \), ther…
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at 90°c, you dissolved 10 g of kcl in 100. g of water. is this solution…
To solve these problems, we typically refer to a solubility curve (a graph showing the solubility of various compounds in water at different temperatures). Since the specific solu…
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2) types of solutions on a solubility curve, the lines indicate the con…
First blank: saturated Second blank: below
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from nature, addresses, and lectures 1. the first in time and the first…
4. Man desires to find the interrelation of elements in nature.
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8. the most useful property of metalloids is their a. varying ability t…
a. Varying ability to conduct electric current ### Question 9
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final for semester 1 name online portion (____ / 93 pts) + paper portio…
### Part 1: Molar Mass Calculation #### For $\boldsymbol{Fe_2(SO_4)_3}$ - Atomic masses: $Fe = 55.85\ \text{g/mol}$, $S = 32.07\ \text{g/mol}$, $O = 16.00\ \text{g/mol}$ - Molar m…
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determine the percentage composition of hydrogen (h) in hcl find total …
The percentage composition of hydrogen (H) in HCl is approximately 2.76%.
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multiple choice question misty begins her conclusion by saying, \my pur…
D. She starts off with the phrase "my purpose today has been."
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antonio stradivari and other craftspeople in the sixteenth to eighteent…
I quality of Cremonese violins results in part from a method the craftspeople used to alter the wood
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tobacco teaser 1. cigarette smoking is the most? cause of death in amer…
1. L. preventable 2. I. nicotine 3. C. inhale 4. A. wrinkles 5. G. cigars 6. K. addicted 7. F. carbon monoxide 8. H. eighteen 9. N. lung cancer 10. D. tar 11. M. lungs 12. E. with…
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1. using the formula given below, determine whether the ions will attra…
### Table for Step1 (already provided, confirmed): | Variable | Charge | Equation Value | |----------|--------|----------------| | $q_1$ | $+3$ | $3$ | | $q_2$ | $-2$ | $2$ | ### …
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multiple choice question if your specific purpose is \to persuade my au…
C. a reason why listeners should only eat organic produce
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name: ice cream in a bag chemistry plays an important role in many ever…
1. An ion is an atom with a charge. 2. A phase change is when matter goes from one state to another as a result of an energy exchange. 3. When salt is added to ice, the salt disso…
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name: myles date: jan 13th block: 2nd 1. for each of the following, lab…
nonmetal #### b.
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na₂co₃ + pb(no₃)₂ → pbco₃ + 2nano₃ 25.1 g of sodium carbonate reacts wi…
\( 63.3 \)
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directions: two beakers of water are heated on the same stove for exact…
Beaker A will have a higher temperature because the same amount of energy was added to a smaller mass.
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what is the overall energy transformation in a coal - fired power plant…
chemical to electrical
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the formation of photochemical smog is a result of a series of reaction…
A. evaporation from gasoline
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a) 1s²2s²2p⁶3s³3d⁵ -
# Explicación: ## Paso 1: Recordar reglas de orbitales Los orbitales $s$ admiten máximo 2 electrones. ## Paso 2: Identificar error en el orbital El término $3s^3$ es inválido, ya …
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pebworth, logan sps_physical science_checkpoint2_2025-2026 23 of 40 pla…
1, 3, 2 (in order for $\text{C}_2\text{H}_4$, $\text{O}_2$, $\text{CO}_2$)
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directions: why does neon (group 18) rarely form compounds with other e…
C. It is already chemically stable because its outer energy level is full.
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directions: select the equations that correctly demonstrate the law of …
$2H_2 + O_2 \to 2H_2O$ $C + O_2 \to CO_2$
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directions: an unknown element from group 1 reacts with an element from…
B. An ionic bond is formed because the metal loses an electron to the nonmetal.
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directions: look at the formula for glucose: $c_6h_{12}o_6$ which of th…
- There are a total of 24 atoms in one molecule of glucose. - There are exactly 12 hydrogen atoms in the molecule. - The ratio of Carbon to Oxygen atoms is 1:1.
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7. which of the following is true about isotopes? a) they have differen…
c) They have different numbers of neutrons. ### Question 8
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1. which of the following is a characteristic of an ion? a) it has no c…
B. It has either a positive or negative charge. ### Question 2
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the table lists two experiments performed using aluminum foil. | experi…
Experiment 1 shows a physical change because the aluminum curls up due to heat. Experiment 2 shows a chemical change because a new substance forms on the aluminum.
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mixing baking soda and vinegar makes the temperature of the solution de…
New elements were formed.
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pebworth, logan sps physical science checkpoint2 2025 - 2026 directions…
B. Electrostatic forces between positive and negative charges
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pebworth, logan sps_physical science_checkpoint2_2025-2026 question: a …
An element located on the far left side.
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multiple-choice question what is compost? water and soil used to help f…
B. Mixture of organic matter mixed with earth materials like dirt or woodchips.
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the empirical formula of hydroquinone is shown below. the molar mass of…
2. \( C_6H_6O_2 \)
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1. to avoid a possible burn when opening the oven, you should stand: a.…
1. A. TO THE SIDE OF THE OVEN. 10. B. A SHARP KNIFE 11. A. WIPE IT UP IMMEDIATELY. 12. C. WITH THE SIDE OF THE LID AWAY FROM YOU. 13. C. KEEP KNIVES SHARP AND USE THE APPROPRIATE …
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after six years of successional time, about how much organic mass is pr…
410 g/m^2/yr
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1. atomic structure | description | atomic number | mass number | net c…
# Explanation: --- ### Parte 1: Estructura Atómica ## Paso 1: Calcular número atómico El número atómico es igual al número de protones ($p^+$). ## Paso 2: Calcular número de masa …
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applying theory to practice 1. when we say an ion has a positive charge…
1. A positive ion has more protons than electrons, having lost one or more electrons. 2. For ions, "opposites attract" means positively charged ions (cations) are attracted to neg…
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question 2. classify the reaction in each of the following equations: a…
a) Double-displacement reaction b) Synthesis reaction c) Combustion reaction d) Decomposition reaction e) Single-displacement reaction
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in 1899, swedish chemist svante arrhenius developed an equation to answ…
A. remains
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practice: isotope calculations #2 1. complete the following table. | is…
### Part 1: Completing the Table To complete the table, we use the following relationships: - **Atomic Number (\(Z\))** = Number of Protons = Number of Electrons (in neutral atoms…
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15. how many grams are equal to 0.11 mole of copper(i) chromate, $\\ce{…
27 grams (or 26.74 grams for more precision)
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periodic table name: jaydin milladate: section 1 use the following clue…
1. Atomic number: 9; 2. Mass number: 19; 3. Valence electrons: 7; 4. Period: 2; 5. Electron configuration: 2,7; 6. Classification: non - metal; 7. Name: Fluorine; 8. Symbol: F ###…
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quiz instructions question 7 4 pts find the pairs: organic no more than…
- organic: no more than 5% of the food is produced without the use of chemical fertilizers, pesticides or other artificial agents - fat - free: must have 0.5 grams or less of fat …
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quiz instructions question 7 4 pts find the pairs. organic: no more tha…
(for the dropdowns shown): - low fat: must have 3 grams of fat or less per serving - lite: must have either 1/2 fewer calories or 50% less fat
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quiz instructions question 7 4 pts find the pairs: organic: no more tha…
To solve this matching problem, we analyze each term and its corresponding definition: ### 1. Organic The definition for "organic" relates to food production without synthetic inp…
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quiz instructions question 7 4 pts find the pairs: organic no more than…
must have 0.5 grams or less of fat per serving
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started jan 15 at 7:44am quiz instructions question 7 4 pts find the pa…
must have 0.5 grams or less of fat per serving If for "low fat":
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choose the complete ground - state electron configuration for neutral r…
[Kr] 5s1
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choose the complete ground - state electron configuration for the alumi…
B. 1s2 2s2 2p6 3s2 3p1
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use dimensional analysis for each problem. how many kilograms are equal…
B. $1.6 \times 10^{-2}\ \text{kg}$
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which of the following are potential hazards which you might encounter …
infectious microorganisms open flames hot surfaces corrosive chemicals sharp tools or broken glass
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al₂o₃ → al + o₂ cl₂ + nabr → nacl + br₂ h₂ + n₂ → nh₃ na + br₂ → nabr c…
Decomposition ### 2. $\ce{Cl_{2} + NaBr -> NaCl + Br_{2}}$
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part i. complete the table identifying the five reaction types (use the…
s for Part II: 1. $\text{P} + \text{O}_2 ightarrow \text{P}_4\text{O}_{10}$: Rxn Type: $\boldsymbol{\text{S (or C)}}$ (if we take synthesis: S, if combustion: C. But based on the …
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determining the combustion of methane gas conclusion initial mass: 1.00…
The reaction is mostly incomplete combustion.
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determining the formation of an iron chloride experimental data for rea…
4.54 g FeCl₂