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NYISHA CRAWFORD

NYISHA C.

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Viewed Questions

Imagine that you get the chance to shoot five arrows at each of the targets depicted below. On each of the targets, indicate the pattern that the five arrows make when A.You have poor accuracy and good precision. B. You have poor accuracy and poor precision. C. You have good accuracy and good precision.

Imagine that you get the chance to shoot five arrows at each of the targets depicted below. On each of the targets, indicate the pattern that the five arrows make when A.You have poor accuracy and good precision. B. You have poor accuracy and poor precision. C. You have good accuracy and good precision.

General Chemistry

Questions asked

INSTANT ANSWER

An aqueous solution of perchloric acid is standardized by titration with a \( \mathbf{0 . 1 9 7} \mathrm{M} \) solution of barium hydroxide. If \( \mathbf{1 5 . 1} \mathrm{mL} \) of base are required to neutralize \( \mathbf{2 7 . 9} \mathrm{mL} \) of the acid, what is the molarity of the perchloric acid solution? M perchloric acid

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INSTANT ANSWER

An aqueous solution of hydroiodic acid is standardized by titration with a \( 0.105 \mathrm{M} \) solution of calcium hydroxide. If \( \mathbf{1 8 . 1} \mathrm{mL} \) of base are required to neutralize \( \mathbf{1 0 . 9} \mathrm{mL} \) of the acid, what is the molarity of the hydroiodic acid solution? M hydroiodic acid

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INSTANT ANSWER

An aqueous solution of potassium hydroxide is standardized by titration with a \( 0.127 \mathrm{M} \) solution of hydrochloric acid. If \( \mathbf{1 4 . 7} \mathrm{mL} \) of base are required to neutralize \( \mathbf{1 9 . 5} \mathrm{mL} \) of the acid, what is the molarity of the potassium hydroxide solution? M potassium hydroxide

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INSTANT ANSWER

What volume of a \( 0.369 \mathrm{M} \) perchloric acid solution is required to neutralize \( 15.1 \mathrm{~mL} \) of a \( 0.197 \mathrm{M} \) barium hydroxide solution? \( \mathrm{mL} \) perchloric acid

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INSTANT ANSWER

What volume of a \( \mathbf{0 . 1 1 3} \mathrm{M} \) hydroiodic acid solution is required to neutralize \( 18.1 \mathrm{~mL} \) of a \( \mathbf{0 . 1 0 5} \mathrm{M} \) sodium hydroxide solution? \( \mathrm{mL} \) hydroiodic acid

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INSTANT ANSWER

What volume of a \( 0.127 \mathrm{M} \) potassium hydroxide solution is required to neutralize \( 14.7 \mathrm{~mL} \) of a \( \mathbf{0 . 2 4 2} \mathrm{M} \) hydrochloric acid solution? \( \mathrm{mL} \) potassium hydroxide

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INSTANT ANSWER

Calculate the number of milliliters of \( 0.786 \mathrm{M} \mathrm{NaOH} \) required to precipitate all of the \( \mathrm{Pb}^{2+} \) ions in \( 109 \mathrm{~mL} \) of \( 0.759 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2} \) solution as \( \mathrm{Pb}(\mathrm{OH})_{2} \). The equation for the reaction is: \[ \begin{array}{l} \quad \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}(a q)+2 \mathrm{NaOH}(a q) \rightarrow \mathrm{Pb}(\mathrm{OH})_{2}(s)+2 \mathrm{NaNO}_{3}(a q) \\ \text { Volume }=\square \mathrm{mL} \end{array} \]

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INSTANT ANSWER

How many \( \mathrm{mL} \) of \( \mathbf{0 . 4 2 2} \mathrm{M} \mathrm{HNO}_{3} \) are needed to dissolve \( \mathbf{5 . 2 3} \mathrm{g} \) of \( \mathbf{B a C O}_{3} \) ? \[ 2 \mathrm{HNO}_{3}(\mathrm{aq})+\mathrm{BaCO}_{3}(\mathrm{~s}) \longrightarrow \mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})+\mathrm{CO}_{2}(\mathrm{~g}) \] \( \mathrm{mL} \)

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INSTANT ANSWER

How many grams of \( \mathrm{PbBr}_{2} \) will precipitate when excess \( \mathrm{MnBr}_{2} \) solution is added to \( 49.0 \mathrm{~mL} \) of \( 0.717 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2} \) solution? \[ \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}(a q)+\mathrm{MnBr}_{2}(a q) \rightarrow \mathrm{PbBr}_{2}(s)+\mathrm{Mn}\left(\mathrm{NO}_{3}\right)_{2}(a q) \] g

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INSTANT ANSWER

The iodide ion concentration in a solution may be determined by the precipitation of lead iodide. \[ \mathbf{P b}^{2+}(\mathrm{aq})+2 \mathrm{l}^{-}(\mathrm{aq}) \longrightarrow \mathrm{Pbl}_{2}(\mathrm{~s}) \] A student finds that \( \mathbf{2 0 . 1 2} \mathrm{mL} \) of \( \mathbf{0 . 6 8 0 0} \mathrm{M} \) lead nitrate is needed to precipitate all of the iodide ion in a \( \mathbf{2 5 . 0 0} \mathrm{mL} \) sample of an unknown. What is the molarity of the iodide ion in the student's unknown? M

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