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Taylor Strickland

Taylor S.

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For each of these reactions, identify the acid and base among the reactants, and state if the acids and bases are Lewis, Arrhenius, and/or Bronsted-Lowry: (a) $\mathrm{PCl}_{4}^{+}+\mathrm{Cl}^{-} \longrightarrow \mathrm{PCl}_{5}$ (b) $\mathrm{NH}_{3}+\mathrm{BF}_{3} \longrightarrow \mathrm{H}_{3} \mathrm{NBF}_{3}$ (c) $\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}+\mathrm{H}_{2} \mathrm{O} \longrightarrow\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{OH}\right]^{2+}+\mathrm{H}_{3} \mathrm{O}^{+}$

For each of these reactions, identify the acid and base among the reactants, and state if the acids and bases are Lewis, Arrhenius, and/or Bronsted-Lowry: (a) $\mathrm{PCl}_{4}^{+}+\mathrm{Cl}^{-} \longrightarrow \mathrm{PCl}_{5}$ (b) $\mathrm{NH}_{3}+\mathrm{BF}_{3} \longrightarrow \mathrm{H}_{3} \mathrm{NBF}_{3}$ (c) $\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}+\mathrm{H}_{2} \mathrm{O} \longrightarrow\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{OH}\right]^{2+}+\mathrm{H}_{3} \mathrm{O}^{+}$

Chemistry The Central Science

An aqueous solution contains these ions: \begin{tabular}{lc} \hline Ion & Concentration (M) \\ \hline $\mathrm{Br}^{-}$ & $0.0010$ \\ $\mathrm{Cl}^{-}$ & $0.0010$ \\ $\mathrm{CrO}_{4}^{2-}$ & $0.0010$ \\ \hline \end{tabular} A solution of silver nitrate is added dropwise to the aqueous solution. Which silver salt will precipitate first? Last?

An aqueous solution contains these ions: \begin{tabular}{lc} \hline Ion & Concentration (M) \\ \hline $\mathrm{Br}^{-}$ & $0.0010$ \\ $\mathrm{Cl}^{-}$ & $0.0010$ \\ $\mathrm{CrO}_{4}^{2-}$ & $0.0010$ \\ \hline \end{tabular} A solution of silver nitrate is added dropwise to the aqueous solution. Which silver salt will precipitate first? Last?

Chemistry: The Molecular Science

The koala dines exclusively on eucalyptus leaves. Its digestive system detoxifies the eucalyptus oil, a poison to other animals. The chief constituent in eucalyptus oil is a substance called eucalyptol, which contains $77.87 \% \mathrm{C}, 11.76 \% \mathrm{H},$ and the remainder O. (a) What is the empirical formula for this substance? (b) A mass spectrum of eucalyptol shows a peak at about 154 amu. What is the molecular formula of the substance?

The koala dines exclusively on eucalyptus leaves. Its digestive system detoxifies the eucalyptus oil, a poison to other animals. The chief constituent in eucalyptus oil is a substance called eucalyptol, which contains $77.87 \% \mathrm{C}, 11.76 \% \mathrm{H},$ and the remainder O. (a) What is the empirical formula for this substance? (b) A mass spectrum of eucalyptol shows a peak at about 154 amu. What is the molecular formula of the substance?

Chemistry The Central Science

Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing numbers of atoms: $0.2 \mathrm{~mol} \mathrm{PCl}_{5}$, molecules, $80 \mathrm{~g} \mathrm{Fe}_{2} \mathrm{O}_{3}, 3.0 \times 10^{23}$ CO molecules.

Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing numbers of atoms: $0.2 \mathrm{~mol} \mathrm{PCl}_{5}$, molecules, $80 \mathrm{~g} \mathrm{Fe}_{2} \mathrm{O}_{3}, 3.0 \times 10^{23}$ CO molecules.

Chemistry: The Central Science in SI Units, Global Edition

Questions asked

ANSWERED

Ronald Prasad verified

Numerade educator

29.96 mL of NaOH is used to titrate 20.70 mL of 0.116 M HCl. What is the concentration of the NaOH?

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Dominique Jan Tan verified

Numerade educator

How many milliliters of 0.122 M H2SO4 are needed to neutralize 0.250g of NaOH? Express the volume in milliliters to three significant digits.

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Susan Hallstrom verified

Numerade educator

A solution of 120.0 mL of 0.190 M KOH is mixed with a solution of 230.0 mL of 0.230 M NiSO4. Part A) Write the balanced chemical equation for the reaction that occurs. Express your answer as a balanced chemical equation. Identify all of the phases in your answer. Part B) What precipitate forms? Express your answer as a chemical formula. Part C) What is the limiting reactant? Express your answer as a chemical formula. Part D) How many grams of this precipitate form? Express your answer in grams to three significant figures. Part E) What is the concentration of Ni2+ that remains in solution? Express your answer in moles per liter to three significant figures. Part F) What is the concentration of SO4-2 that remains in solution? Express your answer in moles per liter to three significant figures. Part G) What is the concentration of K+ that remains in solution? Express your answer in moles per liter to three significant figures.

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John Incabo verified

Numerade educator

Part A) Give the empirical formula of the following compound if a sample contains 0.0130 mol C, 0.0390 mol H, and 0.0065 mol O. Express your answer as a chemical formula. Part B) Give the empirical formula of the following compound if a sample contains 11.66g iron and 5.01g oxygen. Express your answer as a chemical formula. Part C) Give the empirical formula of the following compound if a sample contains 40.0 % C, 6.7 % H, and 53.3 % O by mass. Express your answer as a chemical formula.

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Jennifer Hudspeth verified

Numerade educator

A) What is the mass, in grams, of 2 mol of 12C? Express your answer using two significant figures. The 12 is little numbers in front the C. B) How many carbon atoms are present in a mole of 12C? Express your answer using four significant figures. The 12 is also small to the C.

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David Collins verified

Numerade educator

Part A) Determine the empirical formula of the following compound if a sample contains 0.105 mol K, 0.052 mol S, and 0.157 mol O. Express your answer as a chemical formula. Part B) Determine the empirical formula of the following compound if a sample contains 4.96g Si and 13.5g F. Express your answer as a chemical formula. Part C) Determine the empirical formula of the following compound if a sample contains 87.4 % N and 12.6 % H by mass. Express your answer as a chemical formula.

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Ashwin Banarsee verified

Numerade educator

Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing number of atoms: 60g of KHSO3, 1.1mol N2O, 3.0×1024 Ne atoms.

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Ivan Kochetkov verified

Numerade educator

How many carbon atoms are present in a mole of 12C? Express your answer using four significant figures. N =

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ANSWERED

Ivan Kochetkov verified

Numerade educator

Calculate the percentage by mass of oxygen in the following compounds. a) telavancin, C80H106Cl2N11O27P

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ANSWERED

Ivan Kochetkov verified

Numerade educator

Calculate the percentage by mass of oxygen in the following compounds. Express your answer in percent to three significant figures. a) oxycodone, C18H21NO4 b) methadone, C21H27NO c) proxymetacaine, C16H26N2O3 d) oxytetracycline, C22H24N2O9 e) digoxin, C41H64O14 f) digoxin, C41H64O14

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