Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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what is the hybridization of the central atom in structure p? input as …
sp
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what is the hybridization of the central atom in structure n? input as …
sp3d
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what is the hybridization of the central atom in structure k? input as …
sp
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consider structures h, j, k: what structure has an expanded octet?
j, n
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consider structures a, b, d: what structure has an expanded octet?
d
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annotation requires the following 1. number paragraphs 2. write a summa…
### Paragraph Numbering, Summaries, Vocabulary, and Connection #### 1. First Paragraph (Chemical Bonds in Compounds Introduction) - **Summary**: Explains chemical bonds as forces …
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question 7. a student measures the mass of a sample as 9.67 g. calculat…
El error porcentual es aproximadamente \(1.53\%\)
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what is a chemical bond? ionic bond covalent bond how do chemical bonds…
To determine how chemical bonds create substances like water, salt, and sugar, we analyze each substance: 1. **Water (\(H_2O\))**: Formed by covalent bonds. In a covalent bond, at…
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element # protons # electrons # valence e metal/nonmetal for full valen…
To solve this, we use the properties of atoms (protons = electrons in neutral state, valence electrons, metal/nonmetal, electron gain/loss for octet, new electrons, charge, and io…
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answer the questions in the table below about the shape of the chlorine…
6 ### Second Question (Electron Group Arrangement)
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your answer is incorrect. check the box next to each molecule on the ri…
The molecules with the same shape as the model are \( \boldsymbol{SO_3^{2-}} \), \( \boldsymbol{H_3O^+} \), and \( \boldsymbol{BrO_3^-} \). So we check the boxes next to \( SO_3^{…
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what is the \axe\ description of the tetrachloroiodide (ici₄⁻) anion?
\( AX_4E_2 \)
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answer the questions in the table below about the shape of the triiodid…
linear ### For the second question (bond angle in $\boldsymbol{I_3^-}$):
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answer the questions in the table below about the shape of the phosphor…
trigonal bipyramidal ### For the second question (smallest bond angle in \( PF_5 \)):
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for each compound in the table below, decide whether there would be any…
To determine hydrogen - bonding, we use the rule: A hydrogen bond occurs when a hydrogen atom is bonded to a highly electronegative atom (N, O, F) and is in close proximity to ano…
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what kind of intermolecular forces act between a chlorine monofluoride …
London dispersion forces, dipole - dipole forces
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what kind of intermolecular forces act between a hydrogen peroxide (h₂o…
dispersion forces, dipole - dipole forces, hydrogen bonding
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what kind of intermolecular forces act between a water molecule and a h…
hydrogen bonding, London dispersion forces
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what kind of intermolecular forces act between two ethylene (c₂h₄) mole…
London dispersion forces
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for each pair of compounds listed, check the box next to the one with t…
- For the pair Rn and Ne: Check the box next to Rn. - For the pair $CH_3CH_3$ and $C_2H_4$: Check the box next to $CH_3CH_3$. - For the pair $SnCl_4$ and $GeCl_4$: Check the box n…
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answer the questions in the table below about the shape of the phosphod…
### First Question (Number of Electron Groups): # Explanation: ## Step 1: Determine valence electrons of P and Cl Phosphorus (P) has 5 valence electrons, each Cl has 7, and the an…
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answer the questions in the table below about the shape of the ammonia …
4 ### Second Question (Electron Group Arrangement):
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molecule proposed lewis structure is this a reasonable structure? if no…
No, the total number of valence electrons is wrong. The correct number is: 28
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set the bond strengths: a - a 300 kj/mol b - b 200 kj/mol a - b 380 kj/…
\(-260\) kJ/mol
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q6. choose the correct answer. a sample of element x contains 90 percen…
B. 35
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source: carolyn williams, \a natural label on food means next to nothin…
Yes, because it fails to use quotation marks and fails to cite the source.
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5. given the reaction: 27/13 al + 4/2 he → 30/15 p + 1/0 n. this reacti…
B. artificial transmutation
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predict the molecular geometry of this molecule: step 1 in the diagram,…
# Explanation: ## Step1: Determine the central atom's electron groups The central atom is Cl. It is bonded to 3 F atoms and has 1 lone pair (since Cl has 7 valence electrons, 3 ar…
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use the references to access important values if needed for this questi…
(for Cl - Cl bond length): \boxed{1.99} (or 2.0, but more accurately 1.98 - 2.0 Å; the experimental value is ~1.98 Å, so we can put 1.99 or 2.0) ### Part 2: Weakest Cl - X bond
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use the following lewis diagram for methyl acetate to answer the questi…
tetrahedral ### For the ideal value of the C - C - O angle at atom 2:
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\billionaire space race giant leap for pollution\ by katharine gammon 1…
A. The industry is growing larger each year, E. The space industry is cultivating tourism
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three inequivalent lewis structures for carbonyl sulfide, sco, are show…
### Part 1: Assign Formal Charges The formula for formal charge is: $$\text{Formal Charge} = \text{Valence Electrons} - \text{Non - bonding Electrons} - \frac{1}{2}\text{Bonding E…
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question 20 1 pts what is the volume of 0.1 mole of methane (ch₄)? (one…
2.24 L
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question 19 what does the law of multiple proportions account for? coef…
C. subscripts in chemical formulas
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consider this reaction: li₃n (s) + 3h₂o (l) → nh₃ (g) + 3lioh (l) you n…
117 g (corresponding to the option "117 g")
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what would cause the percent yield of a reaction to be less than 100% t…
The product participates in a side reaction.
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for each bond, show the direction of polarity by placing a + sign next …
- (A) \( \boldsymbol{^{+}Te - O^{-}} \) - (B) \( Te - Se \) (negligible polarity) - (C) \( \boldsymbol{^{+}Se - O^{-}} \) The most polar bond is (A) Te - O.
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consider this hypothetical reaction: a + 4b → c + 3d. assume that the e…
A/4B
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what is the formula mass (molar mass) of sucrose (c₁₂h₂₂o₁₁), table sug…
342 g/mol (the option: 342 g/mol)
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chocolate chip cookie recipe:1 cup of flour100 chocolate chips1 cup sug…
The limiting reactant (ingredient that runs out first) is chocolate chips because it allows making the fewest cookies (30 cookies), so the answer is chocolate chips (the option wi…
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consider this hypothetical reaction: a + 3b → c + 3d. assume that the e…
B. A/B
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using average bond enthalpies (linked above), estimate the enthalpy cha…
$\boxed{-817}$ (Note: The exact value may vary slightly based on bond enthalpy sources, but this is the typical result.)
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using average bond enthalpies (linked above), estimate the enthalpy cha…
\(\boldsymbol{-46}\) kJ (per mole of reaction)
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for each pair of covalently bonded atoms, choose the one expected to ha…
For (A,B): A. C - Br For (C,D): C. N≡N
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free radicals are molecules or ions that have an unpaired electron. the…
s (v = Yes, n = No): 1. $\ce{ClO3}$: $\boldsymbol{v}$ 2. $\ce{BrO3}$: $\boldsymbol{v}$ 3. $\ce{ClO2^-}$: $\boldsymbol{n}$ 4. $\ce{O3}$: $\boldsymbol{n}$
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draw (on paper) a lewis diagram for ch₃och₂ch₃. use your diagram to ans…
The number of C - H bonds = \( \boldsymbol{8} \) The number of O - H bonds = \( \boldsymbol{0} \) The number of C - C bonds = \( \boldsymbol{1} \) The number of C - O bonds = \( \…
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draw (on paper) lewis structures for the carbonate ion and sulfur diflu…
For $\ce{CO_3^{2-}}$: $\boldsymbol{3}$ For $\ce{SF_2}$: $\boldsymbol{1}$
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draw (on paper) a lewis structure for sf₆ and answer the following ques…
for Question 1: - The number of lone pairs = \( 0 \) - The number of single bonds = \( 6 \) - The number of double bonds = \( 0 \)
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draw (on paper) a lewis structure for nh₄⁺ and answer the following que…
- The number of lone pairs \(=\boldsymbol{0}\) - The number of single bonds \(=\boldsymbol{4}\) - The number of double bonds \(=\boldsymbol{0}\) ### Sub - question 2
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use the references to access important values if needed for this questi…
\(5s^{2}5p^{3}\)
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read the paragraph. 1 alejandros guidance counselor is helping him plan…
sentence 3
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read the sentence. 1 alejandros guidance counselor is helping him plan …
sentence 3
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read the paragraph. 1 alejandros guidance counselor is helping him plan…
sentence 4
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name: date: ionic bonding practice worksheet what would be the compound…
\( KCl \) ### Part b: Magnesium + Bromine (Note: "Brominee" is likely a typo, should be Bromine)
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bonding basics - ionic bonds name complete the chart for each element. …
To solve this, we use the following concepts: - The number of protons in an element is equal to its atomic number. - In a neutral atom, the number of electrons is equal to the num…
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predict the molecular geometry of this molecule: step 1 select the elec…
trigonal pyramidal
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predict the molecular geometry of this molecule: step 1 select the elec…
trigonal planar
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part c name the ionic compound pbco₃. spell out the full name of the io…
Lead (II) carbonate
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the lewis structure for sncl3 - is shown. what is the electron - pair g…
Tetrahedral
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determine the formal charge for the left oxygen atom, the central carbo…
O on left: \(-1\) central C: \(0\) O on top: \(-1\)
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if the metal in the ionic compound is a transition elemer name the ioni…
Lead(IV) chloride
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part a what is the name of the ionic compound baco₃? enter the compound…
Barium carbonate
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question 4 of 10 what does the lack of punctuation in william carlos wi…
B. It makes the poem seem short and quick.
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hexacloruro de trifosfato (p y cl) *
\( \boldsymbol{\text{P}_3\text{Cl}_6} \) (or \( \text{PCl}_2 \) if simplified, but the formula from prefixes is \( \text{P}_3\text{Cl}_6 \))
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na₂o (sodio y oxígeno) * tu respuesta
Óxido de sodio (óxido sódico o óxido de sodio(I))
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hexacloruro de trifosfato (p y cl)* tu respuesta
$\boldsymbol{\ce{P3Cl6}}$ (or $\ce{PCl2}$ if simplified, but the prefix - derived formula is $\ce{P3Cl6}$)
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sulfuro de calcio (ca y s) * tu respuesta
$\boldsymbol{\text{CaS}}$
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h₂o₂ (hidrógeno y oxígeno)*
El compuesto con fórmula \( \text{H}_2\text{O}_2 \) es el **peróxido de hidrógeno** (compuesto por hidrógeno y oxígeno).
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h₂o₂ (hidrógeno y oxígeno) * tu respuesta sulfuro de calcio (ca y s) * …
Peróxido de hidrógeno (\( \ce{H_2O_2} \)) ### Second Sub - Question (sulfuro de calcio: Ca y S)
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h₂o₂ (hidrógeno y oxígeno) * 2 puntos tu respuesta sulfuro de calcio (c…
$H_2O_2$ (This is the chemical formula for hydrogen peroxide, formed from hydrogen and oxygen. The subscripts 2 for H and 2 for O are based on the oxidation states and the structu…
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tetracloruro de carbono * c4cl c4cl4 cci cci4 esta es una pregunta obli…
### Primera pregunta (tetracloruro de carbono): # Explicación: ## Paso 1: Analizar el nombre "tetracloruro de carbono" "tetra" significa 4, "cloruro" se refiere a \( \text{Cl}^- \…
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question 3 what makes crystalline solids like salt or quartz stronger t…
The repeating atomic structure holds them together tightly
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question 2 why does rubber not form crystals when it solidifies? it mel…
B. Its atoms are not arranged in a repeating pattern ### QUESTION 3 (assuming the full question is "What makes crystalline solids like salt or quartz strong?")
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how many different molecules are drawn below?
3
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question 1 what is one reason quartz crystals form flat faces and strai…
C. Their atoms are arranged in a repeating pattern ### QUESTION 2 (Note: The option provided is "It melts and reforms into sharp - edged shapes", but to answer why rubber does not…
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solve the following concentration questions a) how many moles of cuso₄ …
$5.4$ moles ### Part (b)
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answer the following related to the solubility graph a) if 60 g of subs…
60°C ### Part (b)
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complete the sentence with the better correlative conjunctions. when su…
both...and
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a neutral atom has the following electron configuration: he2s²2p³ what …
- Chemical symbol: N - Number of electrons: 7 - Number of $2p$ electrons: 3
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an atomic anion with a charge of - 2 has the following electron configu…
\( \text{Te}^{2-} \) ### 2. Number of Electrons in the Ion
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an atomic anion with a charge of -1 has the following electron configur…
s: - Chemical symbol for the ion: \( \text{Br}^- \) - Number of electrons in the ion: 36 - Number of 3d electrons in the ion: 10
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fix any errors in these proposed electron configurations. number of ele…
s: - For 11 electrons: \(1s^{2}2s^{2}2p^{6}3s^{1}\) - For 23 electrons: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{3}\) - For 18 electrons: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\)
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question 24 which of the following is not a state function? a altitude …
D. heat ### Question 25
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which of these properties is/are characteristic(s) of gases? a relative…
- First question: D. A, B, and C. - Second question: A. True.
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what is the name of the instrument that directly measures the pressure …
C. \(4/3\)
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measurements show that the energy of a mixture of gaseous reactants dec…
The change in enthalpy is \(\boldsymbol{-42}\) kJ, and the reaction is exothermic.
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measurements show that the enthalpy of a mixture of gaseous reactants i…
The change in energy of the gas mixture is $\boldsymbol{281\space kJ}$, and the reaction is $\boldsymbol{endothermic}$.
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measurements show that the energy of a mixture of gaseous reactants inc…
The change in enthalpy is $\boldsymbol{155}$ kJ. The reaction is endothermic (the option is: endothermic).
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there are three sets of sketches below, showing the same pure molecular…
- For \(71^\circ \text{C}\) (set A): The sketch representing gas (widely spaced \(\ce{NH_3}\) molecules). - For \(-58^\circ \text{C}\) (set B): The sketch representing liquid ( \(…
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a chemist measures the energy change δh during the following reaction: …
s: 1. This reaction is...: exothermic. 2. Suppose 98.9 g of $\ce{CH4}$ react. Will any heat be released or absorbed?: Yes, released. 3. Heat released: $\boxed{5430}$ (or $5.43\tim…
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a chemist measures the energy change \\( \\delta h \\) during the follo…
endothermic. ### Second Question: Heat release or absorption for 31.4 g HgO reaction
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a chemist measures the energy change \\( \\delta h \\) during the follo…
exothermic. ### Part 2: Determine heat release/absorption for 47.7 g of $\ce{NO2}$
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a mixture of gaseous reactants is put into a cylinder, where a chemical…
endothermic ### 2. Does the temperature of the water bath go up or down?
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answer the questions below about the highlighted atom in this lewis str…
4 ### 2. Number of Pi Bonds
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answer the questions below about the highlighted atom in this lewis str…
1 ### For "In how many pi bonds does the highlighted atom participate?"
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which of the following correctly identifies which has the higher first …
D. Ne ### 9.
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name: pd: chemistry u3l12_q2 ct module day 1 hw the first five ionizati…
4. B. \(Al\), because of the large difference between the third and fourth ionization energies 5. B. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}\) 6. A. \(Cl < P < Mg\)
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name: pd: chemistry u3l12_q2 ct module day 1 hw note: annotate all ques…
C. The electron removed during the third ionization is, on average, much closer to the nucleus than the first two electrons removed were. ### Question 2
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answer the following related to the solubility graph a) if 60 g of subs…
60°C ### Part (b)
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in terms of waste management, which of the following management options…
B. Prevention (reducing the amount of waste generated, ideally to zero)