Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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3. substances that are combined to form products in a chemical reaction…
reactants
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2. (a) makes a chemical reaction happen faster. catalyst element reacti…
catalyst
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q 1. a(n) ________ is a result of a substance being combined in a chemi…
product
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5. cooking a cake is an example of a: physical change chemical change
A. Chemical Change
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4. ice melting is an example of a: chemical change physical change
Physical Change
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3. a nail rusting is an example of a: physical change chemical change
Chemical Change
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2. in this type of change, a new substance is formed. physical change c…
chemical change
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1. in this type of change, no new substance is formed in a: physical ch…
physical change
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a compound is found to contain 6.360 % silicon, 36.18 % bromine, and 57…
Question 1: \(SiBr_{2}I_{2}\) Question 2: \(SiBr_{2}I_{2}\)
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a compound is found to contain 10.85 % silicon, 27.40 % chlorine, and 6…
SiCl₂Br₂
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28 elección múltiple 2 puntos el compuesto de la siguiente imagen es: h…
D. éster
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27 elección múltiple 2 puntos el compuesto de la siguiente imagen es: c…
# Explicación breve: Los éteres tienen la estructura general R - O - R', donde R y R' son grupos alquilo. En la estructura dada, $CH_3 - O - C(CH_3)_3$, se cumple esta estructura …
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a 6.017 gram sample of cobalt is heated in the presence of excess sulfu…
CoS
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18 elección múltiple 2 puntos escoge la cantidad de pares compartidos e…
4
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which correctly lists three characteristics of minerals? solid, crystal…
solid, crystal structure, definite chemical composition
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the percent by mass of barium in ba(cn)2 is __%. use the references to …
72.52
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what is the mass of a dinitrogen tetrafluoride molecule? grams use the …
$1.73\times 10^{-22}$
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1. how many molecules of sulfur tetrafluoride are present in 4.82 grams…
1. $2.69\times 10^{22}$ molecules 2. $8.02$ grams
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1. how many molecules of carbon tetrachloride are present in 4.08 moles…
1. $2.457\times 10^{24}$ molecules 2. $0.0754$ moles
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1. how many molecules of sulfur tetrafluoride are present in 2.73 moles…
1. $1.64\times 10^{24}$ molecules 2. $0.0742$ moles
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use the references to access important values if needed for this questi…
a. $2.023\times 10^{24}$ atoms b. $0.40$ moles
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el siguiente compuesto se clasifica como: h3c c(=o)n(ch3)ch3 éter. ceto…
- Primera pregunta: amida. - Segunda pregunta: éster.
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el siguiente compuesto se clasifica como: ch₃ o ch₃ ch₃ ch₃ éter. ceton…
cetona.
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el siguiente compuesto se clasifica como: alcano. aldehido. amina. tiol.
amina.
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el siguiente compuesto es un h3c—c—o—ch3 | ch3 | ch3 tiol éster éter al…
C. Éter
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el siguiente compuesto se clasifica como hs sh o tiol o hidrocarburo ar…
tiol
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el siguiente compuesto se clasifica como: hidrocarburo aromático. ceton…
ácido carboxílico.
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el siguiente compuesto se clasifica como: éter. hidrocarburo aromático …
aldehido.
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pregunta 5 el siguiente compuesto se clasifica como: h h - c - oh h alc…
alcohol.
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11. complete the concept map using the following terms: electrons, matt…
# Breve explicación: La materia está compuesta por átomos. Los átomos tienen un núcleo formado por protones y neutrones, y alrededor del núcleo hay un espacio vacío donde se encue…
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which statement best describes the rhythm of \song of myself\? the poem…
The rhythm is very similar to the rhythm of everyday speech.
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classifying matter: flow chart review in the missing terms, then add ex…
From top - down, left - to - right: Atom; fundamental; mass; space; Atoms, Molecules, Ions
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a white powder is stirred into water and dissolves completely. ice melt…
1. Physical change: A white powder dissolving in water, ice melting, tearing paper. Chemical change: A clear solution mixing to form a solid, baking soda and vinegar reaction. 2. …
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hcl(aq) + ba(oh)2(aq) → express your answer as a chemical equation. ide…
$2HCl(aq)+Ba(OH)_2(aq) ightarrow BaCl_2(aq)+2H_2O(l)$
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4 you might find which of the following oxymoronic phrases in a science…
Artificial intelligence
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practice problems: 1. determine if the following diagrams represent an …
| Diagram | Element, compound or mixture | Solid, liquid, or gas | | ---- | ---- | ---- | | 1 | Compound | Gas | | 2 | Mixture | Gas | | 3 | Compound | Solid | | 4 | Element | Sol…
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practice problems: 1. determine if the following diagrams represent an …
1. Gas, compound 2. Gas, mixture 3. Solid, compound 4. Solid, element 5. Gas, element
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this freshwater biome is characterized by fast - flowing water that can…
D. Rivers
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a physical property is observed with the senses and can be determined w…
| Property | Physical Property | Chemical Property | |--|--|--| | 1. red color | √ | | | 2. density | √ | | | 3. flammability | | √ | | 4. solubility | √ | | | 5. reacts with acid…
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the formula of nitrous acid is. the name of h3po4 is.
The formula of nitrous acid is HNO₂. The name of H₃PO₄ is phosphoric acid.
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the name of h2so3 is the formula of acetic acid is
The formula of acetic acid is CH₃COOH. The name of H₂SO₃ is sulfurous acid.
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give the acid name and the acid formula for each of the anions below. n…
| Anion Name | Anion Formula | Acid Name | Acid Formula | | ---- | ---- | ---- | ---- | | nitrate | $NO_3^-$ | nitric acid | $HNO_3$ | | sulfate | $SO_4^{2 -}$ | sulfuric acid | $…
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what is the formula for carbon tetrafluoride? what is the formula for i…
1. $CF_4$ 2. $FePO_4$ 3. Xenon trioxide 4. Cobalt(III) nitrite
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what is the formula for carbon tetrafluoride? what is the formula for i…
1. $CF_{4}$ 2. $FePO_{4}$ 3. Xenon trioxide 4. Cobalt(III) nitrite
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classification of matter. name: why? looking at all the things in this …
Top - blank: Particles Bottom - left blank: mass Bottom - right blank: space
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what is the formula for zinc hydroxide? what is the formula for carbon …
1. $Zn(OH)_2$ 2. $CO_2$ 3. Oxygen difluoride 4. Potassium cyanide
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what is the formula for sulfur tetrafluoride? what is the formula for n…
1. Sulfur tetrafluoride: $SF_4$ 2. Nitrogen dioxide: $NO_2$ 3. Dinitrogen monoxide: $N_2O$
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classifying matter. flow - chart review. name: particles pure substance…
From top - down, left - to - right: smallest; mass; space; pure substances; mixtures; compound
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what is the formula for boron tribromide? what is the formula for sulfu…
Boron tribromide: BBr₃ Sulfur tetrafluoride: SF₄ Sulfur trioxide: SO₃
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what is the name of the compound with the formula cbr4? what is the nam…
1. Carbon tetrabromide 2. Disulfur decafluoride 3. Carbon tetrachloride
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what is the formula for carbon dioxide? what is the formula for dioxyge…
Carbon dioxide: $CO_2$ Oxygen difluoride: $OF_2$ Sulfur dioxide: $SO_2$
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word bank: particles, pure substances, atom, elements, smallest, mixtur…
From top to bottom, left to right: 1. Atom 2. Molecule 3. Smallest 4. Mass; Space 5. Pure substances 6. Element 7. Compound 8. Mixtures 9. Heterogeneous mixtures 10. Homogeneous m…
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what is the name of the compound with the formula so2? what is the name…
Sulfur dioxide, Dinitrogen tetrafluoride, Nitrous oxide
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what is the formula for ammonium bromide? what is the formula for ammon…
Ammonium bromide: $NH_4Br$ Ammonium sulfite: $(NH_4)_2SO_3$ Ammonium fluoride: $NH_4F$
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what is the formula for ammonium bromide? what is the formula for ammon…
1. Ammonium bromide: $NH_4Br$ 2. Ammonium sulfite: $(NH_4)_2SO_3$ 3. Ammonium iodide: $NH_4I$
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what is the name of the compound with the formula (nh4)2so3? what is th…
1. Ammonium sulfite 2. Ammonium bicarbonate 3. Ammonium sulfate
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what is the formula for sodium hydrogen carbonate? what is the formula …
Sodium hydrogen carbonate: $NaHCO_3$ Sodium cyanide: $NaCN$ Sodium hydrogen sulfate: $NaHSO_4$
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what is the formula for sodium hydrogen sulfate? what is the formula fo…
Sodium hydrogen sulfate: $NaHSO_4$ Calcium hydroxide: $Ca(OH)_2$ Potassium hydrogen carbonate: $KHCO_3$
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what is the name of the compound with the formula kcn? what is the name…
1. Magnesium hydroxide 2. Sodium hydrogen sulfate 3. Potassium cyanide
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what is the formula of sodium chlorite? what is the name of the compoun…
1. The formula of sodium chlorite is $NaClO_2$. 2. The name of the compound with the formula $KClO$ is potassium hypochlorite.
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1) identify each substance as either a pure substance or a mixture. 2) …
# Explanation: ## Step1: Recall definitions Pure substances have fixed composition, mixtures have variable composition. Elements are made of one - type of atom, compounds are made…
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what is the formula for calcium sulfite? what is the formula for barium…
Barium nitrite: $Ba(NO_{2})_{2}$ Calcium sulfite: $CaSO_{3}$
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what is the name of the compound with the formula baso3? what is the na…
The compound with formula $BaSO_3$ is barium sulfite. The compound with formula $KNO_2$ is potassium nitrite.
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what is the formula for potassium sulfate? what is the formula for alum…
Potassium sulfate: $K_2SO_4$ Aluminum carbonate: $Al_2(CO_3)_3$ Barium phosphate: $Ba_3(PO_4)_2$
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what is the formula for calcium sulfate? what is the formula for alumin…
1. $Mg_{3}(PO_{4})_{2}$ 2. $Al_{2}(CO_{3})_{3}$ 3. $CaSO_{4}$
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what is the name of the compound with the formula ca(ch3coo)2? what is …
Calcium acetate Magnesium carbonate Barium chromate
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complete the following table: cation formula anion formula compound for…
| Cation | Anion | Compound Formula | | ---- | ---- | ---- | | $Ag^+$ | $S^{2 -}$ | $Ag_2S$ | | $Ag^+$ | $SO_3^{2 -}$ | $Ag_2SO_3$ | | $Ag^+$ | $PO_4^{3 -}$ | $Ag_3PO_4$ | | $Ca^{…
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complete the following table: cation formula na+ ba2+ mg2+ anion formul…
| Cation | Anion | Compound Formula | | ---- | ---- | ---- | | Na⁺ | SO₄²⁻ | Na₂SO₄ | | Ba²⁺ | SO₄²⁻ | BaSO₄ | | Mg²⁺ | SO₄²⁻ | MgSO₄ | | Na⁺ | CrO₄²⁻ | Na₂CrO₄ | | Ba²⁺ | CrO₄²⁻ …
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complete the following table: cation formula anion formula compound for…
| Cation Formula | Anion Formula | Compound Formula | | ---- | ---- | ---- | | Fe²⁺ | O²⁻ | FeO | | Fe²⁺ | F⁻ | FeF₂ | | Fe²⁺ | I⁻ | FeI₂ | | Co³⁺ | O²⁻ | Co₂O₃ | | Co³⁺ | F⁻ | Co…
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the compound cuso₃ is an ionic compound. what are the ions of which it …
Cation formula: Cu²⁺ Anion formula: SO₃²⁻
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the compound fecl₂ is an ionic compound. what are the ions of which it …
Cation formula: Fe²⁺ Anion formula: Cl⁻
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the compound caf2 is an ionic compound. what are the ions of which it i…
Cation formula: $Ca^{2+}$ Anion formula: $F^-$
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what is the formula for lead(ii) chloride? what is the formula for coba…
Lead(II) chloride: $PbCl_{2}$ Cobalt(II) iodide: $CoI_{2}$ Nickel(II) fluoride: $NiF_{2}$
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what is the formula for chromium(iii) oxide? what is the formula for ch…
Chromium(III) oxide: $Cr_{2}O_{3}$ Chromium(II) sulfide: $CrS$ Cobalt(III) bromide: $CoBr_{3}$
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what is the name of the compound with the formula crf2? what is the nam…
Chromium(II) fluoride Cobalt(II) chloride Copper(I) oxide
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what is the formula of the ionic compound expected to form between the …
$BaO$
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what is the formula for calcium sulfide? what is the formula for alumin…
Calcium sulfide: $CaS$ Aluminum chloride: $AlCl_{3}$ Magnesium oxide: $MgO$
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what is the name of the compound with the formula cabr₂? what is the na…
1. Calcium bromide 2. Magnesium chloride 3. Barium fluoride
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what is the name of the alkali metal that is in period 4? what is the n…
Potassium Bromine Magnesium Helium
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what is the name of the element that is in group 3b and period 4? what …
1. Scandium 2. Iodine 3. Titanium 4. Barium
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give the symbol for an element that is 1) a halogen. 2) an alkali metal…
1. Cl 2. Na 3. He 4. Ca
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an ion from a given element has 29 protons and 27 electrons. what is th…
Name of the element: Copper Charge on the ion: + 2 Symbol for the ion: $Cu^{2 + }$
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an ion from a given element has 15 protons and 18 electrons. what is th…
Name of the element: Phosphorus Charge on the ion: - 3 Symbol for the ion: $P^{3 - }$
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from examining the peak wavelength of the light emitted from a star we …
C. surface temperature
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by examining the widths of the spectral lines we can find information a…
rotation
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question 5 which subatomic particles are contained in the nucleus of an…
C. Protons and neutrons
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an ion from a given element has 13 protons and 10 electrons. what is th…
What is the name of the element?: Aluminum What is the charge on the ion?: +3 What is the symbol for the ion?: $Al^{3 + }$
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isotope #3 • element symbol • nuclear symbol • atomic number • mass num…
Element Symbol: N Nuclear Symbol: $_{7}^{15}N$ Atomic Number: 7 Mass Number: 15 Electrons: 7
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use the references to access important values if needed for this questi…
Isotope #1: - Element Symbol: N - Atomic Number: 7 - Mass Number: 14 - Protons: 7 - Neutrons: 7 - Electrons: 7 Isotope #2: - Nuclear Symbol: $^{55}_{25}Mn$ - Atomic Number: 25 - P…
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how many protons, neutrons and electrons are there in a neutral atom of…
Protons: 47 Neutrons: 62 Electrons: 47
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which statement describes one feature of a minerals definite chemical c…
It always contains certain elements.
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part b enter the ions present in a solution of k₃po₄. express your answ…
$K^{+},PO_4^{3 - }$
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marine debris is best described as being composed of ________. a. solid…
D. things discarded by humans
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drag the tiles to the correct boxes to complete the pairs. match each s…
1. Occupational Safety and Health Administration 2. Environmental Protection Agency 3. Food and Drug Administration
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1. how many grams of carbon are present in 4.08 moles of carbon tetrach…
1. $49.0$ grams 2. $0.0688$ moles
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1. how many moles of sulfur tetrafluoride are present in 2.62 grams of …
1. $0.0242$ moles 2. $289$ grams
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1. how many grams of iron(iii) chromate are present in 1.59 moles of th…
1. $730.923$ grams 2. $0.00744$ moles
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for the following reaction in aqueous solution, identify the species th…
C. $K^{+}$, D. $OH^{-}$
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what would you multiply \atoms of rubidium\ by to get the units \grams …
First number: $\frac{1}{6.022\times 10^{23}}$, First unit: mol/atom; Second number: $85.47$, Second unit: g/mol
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solid aluminum hydroxide reacts with a solution of hydrobromic acid. wr…
Part 1: $Al(OH)_3(s)+3HBr(aq) ightarrow AlBr_3(aq)+3H_2O(l)$ Part 2: $Al(OH)_3(s)+3H^+(aq) ightarrow Al^{3+}(aq)+3H_2O(l)$