Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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day 5 new vocabulary and concepts name date match the science vocabular…
1. F. Products 2. E. Physical Change 3. A. Balanced Equation 4. C. Chemical Reaction 5. B. Chemical Change 6. H. The Law of Conservation of Mass 7. G. Reactants 8. D. Coefficient
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read the stanza from “the charge of the light brigade:” “forward, the l…
ABBCCDDEC
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determine the relationship between structure a and structure b in each …
### First Row: # Explanation: ## Step1: Analyze molecular formula Check the number of atoms: Structure A and B both have 3 C, 6 H, 1 O. But check bonding and arrangement. Isomers …
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fill in the blanks below to describe the different types of chemical bo…
1. Hydrogen bonds; hydrogen atoms; attraction between two molecules of water 2. Ionic bonds; ions; NaCl and MgCl₂ 3. Single covalent bonds; electrons; bond between 2 hydrogen atom…
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labels ① drop zones ← reset all image description
To solve this problem, we analyze the electron - proton configurations of sodium (Na) and chlorine (Cl) atoms and their ions: ### Step 1: Analyze the sodium atom/ion - A sodium (N…
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fill in the blanks with the appropriate word or words to correctly desc…
### First Blank Set: - **Explanation for first blank**: To form compounds, different elements bond. So first blank: elements. - **Explanation for second blank**: Bonding of differ…
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use the information found in the periodic table below to place the elem…
Smallest to Largest: \( H \), \( Li \), \( Be \), \( Na \), \( Mg \), \( K \), \( Ga \), \( As \), \( Br \), \( Kr \)
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you must round all your answers to the correct number of sig. figs.!!! …
31.2 (or 31 if rounded to two sig figs) ### Question 2
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4. a sample of ethane c₂h₆ with a mass of 15 g has the same number of m…
A. 14.0 g of nitrogen gas \( \text{N}_2 \)
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draw the lewis structure created by the curved arrow. write in formal c…
The Lewis structure will have: - A carbon (C1) with a positive charge (\(+\)), bonded to a hydrogen (H), another carbon (C2) (which is bonded to three hydrogens), and a chlorine (…
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write the name for the following compounds. 3. liclo₄ 4. hgf₂ 5. cas 6.…
3. Lithium perchlorate 4. Mercury(II) fluoride 5. Calcium sulfide 6. Barium phosphate 7. Strontium sulfate 8. Potassium carbonate 9. Copper(I) cyanide 10. Sodium hydroxide 11. Iro…
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draw the lewis structure created by the curved arrow. write in formal c…
The Lewis structure after the curved arrow is \( \boldsymbol{\ce{H - \overset{+}{N} = C - H}} \) with a lone pair on \( \ce{C} \) (formal charge on \( \ce{N} \) is \( +1 \), on \(…
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draw a lewis structure for the molecule below, showing all lone pairs. …
The Lewis structure is drawn as follows (text - based for representation): \( \ce{H_{2}\overset{:}{N}-CH_{2}-C(\overset{:}{O})=O - O - CH_{3}} \) (In a graphical drawing, you woul…
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7. what is a precipitate?
A precipitate is an insoluble solid substance that forms and separates out from a liquid (usually aqueous) solution as a result of a chemical reaction.
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how do i write the symbols and information? - hyphen notation - element…
## Hyphen notation - Element name followed by the mass number - **Same atomic number (proton count)** - Used to differentiate between two isotopes of the same element - Example: C…
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draw a lewis structure for the molecule below, showing all lone pairs. …
The Lewis structure has: - Nitrogen (\( \text{N} \)) with 1 lone pair (2 electrons). - Carbonyl oxygen (\( \text{O} \)) with 2 lone pairs (4 electrons). - The carbon - hydrogen an…
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match the following thesis statements with the stand taken by the write…
1. To stop puppy mills from breeding unhealthy puppies, more people should consider adopting dogs from shelters. → for the adoption of dogs 2. People should avoid eating junk food…
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how do some cities use bivalves like mussels for water-quality monitori…
B. When exposed to pollutants, bivalves close their shells and trigger alarms through monitoring systems
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knowledge check heres an activity to help you test the knowledge you th…
True
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select each component of chemical evolution theory from the choices bel…
- An energy source, such as sunlight - Very different, oxygenless atmosphere - Molecules are built from simple to complex.
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how many electrons can the a. 0 b. 2 c. 8 d. 18
b. 2
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how many electrons are there in the out a. 2 b. 8 c. 8 d. 1
b. 8 (or c. 8, as both have 8; likely a formatting error in the options, but 8 is the correct number for a stable outermost electron shell in most cases)
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4. instead of being direct, he made an oblique remark about his opponen…
## Question 4 Part A: c. Lack of straightforwardness Part B: b. It uses a contrasting statement. ## Question 5 Part A: a. Burning Part B: b. The detailed instructions allow the me…
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stoichiometry day 2 name date period balance the following equation. __…
### Part 1: Balance the Equation First, we balance the chemical equation \( \text{N}_2 + \text{F}_2 ightarrow \text{NF}_3 \). ## Step 1: Balance Nitrogen (N) On the left, we have …
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multiple-choice question what element is #1 fluorine boron beryllium hy…
Hydrogen
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multiple-choice question are element #2 & #4 the same element? no becau…
Yes because they have the same number of protons
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multiple-choice question how many electrons does helium have? helium (h…
2
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argon (ar) has atomic number = 18 and average atomic mass = 39.9 how ma…
18
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multiple-choice question an atom with a +2 charge has - gained 2 electr…
lost 2 electrons
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if an atom gains electrons it become a ________. cation neutral atom an…
anion
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read the information below and then answer the questions: foodborne ill…
1. Restated definition of foodborne illness: Foodborne illness (or food poisoning) is a disease caused by consuming food or drinks contaminated with germs, chemicals, bacteria, vi…
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ii. chimie (10pts) 1) compléter le texte ci - dessous en utilisant les …
1. L'électrode reliée à la borne négative du générateur est **la cathode** ; celle reliée à la borne positive du générateur est **l'anode**. Au cours de l'électrolyse de l'eau, le…
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chapter 20: environmental issues latin america save the environment as …
C. air ### Question 2
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country profile: cuba cuba is the largest island in the caribbean sea. …
- "island nation with extensive coastlines" - "important fishing industry" - "ruled by a Communist government" - "does not trade with close neighbor the United States" - "few mine…
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1. calculate the molarity of 0.060 moles nahco₃ in 1500. ml of solution…
0.040 M ### Problem 2
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s20 organic chemistry notes 1. provide a definition for organic chemist…
1. Organic Chemistry: The branch of chemistry focused on the study of compounds containing carbon (typically bonded to hydrogen, oxygen, nitrogen, and other elements), excluding s…
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1 jason works for a restaurant that serves only organic, local produce.…
D. Green business
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1 mol = 22.4 l for a gas at stp 1 mol = 6.02 x 10²³ particles 1. how ma…
\(0.05\space mol\) ### Question 2
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compute reaction rates for all seven trials assume that each tablets ma…
Full tablet: 29 mg/L/sec Eight pieces: 35 mg/L/sec Tiny pieces: 43 mg/L/sec
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compute reaction rates for all seven trials assume that each tablets ma…
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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directions: use the information in unit 3 lesson 2 and lesson 3 to answ…
1. A. exponential population growth 2. Nutrients (nitrogen and phosphorus, from organic waste in sewage)
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combinations of two or more different elements held together in fixed p…
C. compounds
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the number of ______ in an atom determines which element it is. options…
C. protons
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temperature and energy as discussed in a prior lesson, we know because …
- Temperature comparison: The temperatures of the gases in the two containers are equal. This is because the average kinetic energy per particle is directly proportional to the te…
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a change of matter that occurs when atoms link together in a new way, c…
C. Chemical Change
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complete the table below by writing the symbols for the cation and anio…
| Ionic Compound | Cation | Anion | | ---- | ---- | ---- | | $\text{AgBr}$ | $\text{Ag}^+$ | $\text{Br}^-$ | | $\text{Cr}_2\text{S}_3$ | $\text{Cr}^{3+}$ | $\text{S}^{2-}$ | | $\t…
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select the correct answer from each drop - down menu. what are the perc…
73.2%
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properties of matter foldable instructions types of matter: draw the tr…
1. Types of Matter Tree: ``` Matter ├─ Pure Substances │ ├─ Elements │ └─ Compounds └─ Mixtures ├─ Homogeneous └─ Heterogeneous ``` 2. Phase Change Diagram: (Conceptual) - Y-axis:…
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two military options of the u.s. government to end world war ii option …
D. atomic bombs
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chapter 15 heat transfer and cooking methods exam accomodated matching …
s: 1. N. radiation 2. B. broiling 3. F. convection 4. L. mechanical convection 5. H. fond 6. M. microwave radiation 7. G. denaturation 8. I. grilling 9. E. conduction 10. A. broil…
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4) water is a major agent of chemical weathering because water (1) cool…
4) (4) dissolves many of the minerals that make up rocks 5) (4) weathering and erosion 6) (1) type of bedrock material 7) (2) bedrock composition and climate 8) (4) greater precip…
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the table shows the densities of four solid objects in grams per millil…
### Floats in the corn syrup sample: foam lid, wooden bead, six-sided die ### Sinks in the corn syrup sample: gold ring
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at 25°c, a grape has a density of 1.08 grams per milliliter, and a corn…
The grape will float on the surface of the corn syrup.
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at 25°c, a vegetable oil sample has a density of 0.92 grams per millili…
The vegetable oil will float on the water.
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devon adds milk to a beaker of molasses. after the liquids settle, this…
floats on the surface of . . . less
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fe₂o₃ → fe + o₂
The balanced equation is $\ce{2Fe_{2}O_{3} -> 4Fe + 3O_{2}}$, so the coefficients are 2 (for $\ce{Fe_{2}O_{3}}$), 4 (for Fe), and 3 (for $\ce{O_{2}}$). If using moles, for example…
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darrell adds water to a beaker of kerosene. after the liquids settle, t…
sinks below . . . more
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caitlyn is learning about a type of energy that is stored in batteries.…
D. chemical energy
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amount of the substance changes. this is because characteristic propert…
- Because the temperature in Sam's kitchen is higher than the melting point of the coconut oil, the coconut oil is a liquid. - A substance's melting point is higher when the attra…
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different physical and chemical properties. when a substance is a react…
A. A substance's chemical structure affects its properties. B. A chemical change occurs during saponification.
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chapter 18 heat transfer and cooking methods exam accommodation matchin…
N. radiation ### Question 2
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which process is a chemical change? burning a match boiling water melti…
A. burning a match
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where are nonmetals located in the periodic table? periodic table of el…
Nonmetals are located on the right side of the periodic table, including hydrogen in the top left corner, and the noble gases in the far right column.
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chapter 15 heat transfer and cooking methods exam accommodation matchin…
N. radiation ### Question 2
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which statement best describes the difference between a physical change…
A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
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what is the correct formula for iron (iii) sulfate * fe(so4) fe2(so4)3 …
B. $\text{Fe}_2(\text{SO}_4)_3$ ### Second Question: What is the correct formula for Copper (II) fluoride?
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what is the correct formula for aluminum cyanide * al3cn al2(cn)3 alcn3…
D. \( \text{Al(CN)}_3 \) (assuming the options are labeled as A: Al3CN, B: Al2(CN)3, C: AlCN3, D: Al(CN)3) ### Second Question: Correct formula for Magnesium acetate
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what is the correct formula for sodium phosphate? * na(po4)3 na4po na3(…
C. $\text{Na}_3(\text{PO}_4)$ (assuming the options are labeled as A. $\text{Na(PO}_4\text{)}_3$, B. $\text{Na}_4\text{PO}$, C. $\text{Na}_3(\text{PO}_4)$, D. $\text{Na}_2(\text{P…
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sneakers, trainers, runners—whatever one calls these popular shoes—thei…
C. It introduces the topic by highlighting the various names for athletic shoes, setting the stage for a historical overview. (Note: Assuming the options are labeled A, B, C in or…
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small bubbles of carbon dioxide are what give soda water its ______. 1 …
1. effervescence
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unit 6 stoichiometry name: show all work for credit including labeling …
1. $\boldsymbol{1054.00}$ moles of NO 2. $\boldsymbol{20.00}$ moles of $CO_2$ 3. $\boldsymbol{0.19}$ moles of $H_2$ 4. $\boldsymbol{29.00}$ liters of $CO_2$
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read the following excerpt from levitt and dubner’s freakonomics. drivi…
B. Feldman's payment system was largely successful
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if morality represents the way we would like the world to work and econ…
D. to lend credibility and additional support to their conclusion
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grammar passage plastic pollution is globally distributed across all oc…
D. , ranging from zooplankton to whales, seabirds, and marine reptiles,
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ionic covalent metallic drag one picture and one definition to each of …
- Ionic: Drag the diagram with electron transfer (the one labeled with Before and After showing electron transfer to form ions) and the "Transfer electrons" definition. - Covalent…
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selections 1 and 2 selection 1: the architect of possibility visionary …
B. transformed fear into strength through the art of language ### Question 2 (Note: The last option in question 2 is cut off, but we analyze the visible options and the author's p…
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the formula used to convert a temperature from degrees fahrenheit (°f) …
A. $-40^\circ$
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which sphere is involved in the carbon biogeochemical cycle? atmosphere…
E. All of the above
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question 10 in what field to scientists study the processes that change…
geochemistry
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question 9 1 pts which is false about the atmosphere? it helps keep the…
Question 9: It is composed of 78% oxygen and 21% nitrogen. Question 10: geochemistry
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what subspecialty of earth science studies patterns of weather over a l…
B. climatology
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3. how many moles is 3.14×10²⁴ atoms of gold?\ \\(\\frac{196.966}{3.14}…
Approximately \( 5.21 \) moles (or more precisely, using \( 6.022 \times 10^{23} \): \( \frac{3.14 \times 10^{24}}{6.022 \times 10^{23}} \approx 5.21 \) moles) ### Question 4: How…
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periodic table: geography: name alina p. date complete this chart about…
To complete the chart, we use the periodic table's properties (group, period, block, state, metal/non - metal/metalloid, special group) for each element: ### Radon - **Group #**: …
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unit 6 short answer ****make sure that your name is on this page. rip i…
Balanced Reaction: $\boldsymbol{C_5H_{12}(l) + 8O_2(g) ightarrow 5CO_2(g) + 6H_2O(g)}$ Type of Reaction: Combustion ### Question 28: Calcium hydroxide and sodium phosphate react..…
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unit test unit test review active 1 2 3 4 5 6 7 8 9 10 in the diagram b…
equilibrium.
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part 3: classify each as physical property (a) or chemical property (b)…
a #### 14. Silver will tarnish in air.
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a particulate model for chemistry is a representation of atoms, ions, o…
B. $\text{AgNO}_3 + \text{NaCl} ightarrow \text{AgCl} + \text{NaNO}_3$ (represented by the particulate model of AgNO₃ + NaCl reacting to form AgCl + NaNO₃)
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counting unit in chemistry, and the mass of one mole of a substance is …
B. $\frac{5.0\ \text{g}}{56\ \text{g/mol}}$
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unit 6 test multiple choice part 1: classify each type of reaction as s…
b. Double Replacement #### Question 2
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a. single replacement c. synthesis/combination e. combustion b. double …
a. Single Replacement ### Question 6
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unit 7 review - chemical formulas and chemical compounds 1. ____ in a s…
1. (c) the charge on each Fe ion. 2. (c) changes the formula so that it no longer represents the compound it previously represented. 3. a. 4 b. 6 c. 21 d. $4.2 \times 10^{24}$ 4. …
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question #1 carmen would like to learn about the history and origins of…
religion
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the structure of the compound or molecule helps predict the name of com…
B. The two nonmetals indicate that covalent naming rules apply.
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which compound is an example of a binary ionic compound? a h₂o b h₂so₄ …
C. $\text{MgF}_2$
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what is the chemical formula for the ionic compound calcium chloride? a…
B. $\text{CaCl}_2$
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experiment 3 pt.1, & pt.2: worksheet q.10 what does a clear or transpar…
B. No precipitate is present
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what gas is evolved when acid (h⁺) is added to either carbonate or bica…
D. Carbon dioxide
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the calcium ion can be identified by the formation of calcium oxalate, …
A. White
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what is the chemical formula for aluminum fluoride? a $\\ce{al_{3}f}$ b…
B. $\text{AlF}_3$
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what is the correct name for the ionic compound, mgcl₂? a manganese chl…
B. magnesium chloride