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Determine the mass of potassium benzoate.
What mass of potassium benzoate, KC7H5O2, is necessary to prepare one liter of a 0.125 molar solution of potassium benzoate?
A 1.87 g sample of Mg reacts with 80.0 mL of a hydrochloric acid solution (pH = -0.544). What is the pH of the solution after all the Mg has reacted? Assume constant volume.
What is the molarity of 2.00 L NaOH Solution prepared from the dilution of 50.00 mL of 19.1 M NaOH?
For the reaction between permanganate ion and sufite ion in basic solution, the unbalanced equation is: MnO 4 - + SO 3 2- MnO 2 + SO 4 2- When this equation is balanced using the smallest whole number coefficients po ...
If you take a 10.0 mL portion of a 14.8 M ammonia solution and dilute it to a total volume of 0.250 L, what is the concentration of ammonia in the final solution? Provide an answer correct to 2 significant figures. For e ...
A ground state H-atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energylevel. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and a second to ret ...
Question 1 - State why the second part of each statement is incorrect and correct it. a) Ammonium phosphate is (NH 3 ) 4 PO 4 b) Ammonium hydroxide is ALOH 3 c) Cr(NO 3 ) 3 is chromic(ii) chloride d) ...
Write the elemental symbol, with charge, for when Aluminum forms an ion and tell whether it is an anion or a cation. Think about whether it gains or loses electrons.
What mass of NaH 2 PO 4 must be added to 1.20 L of 0.20 M Na 2 HPO 4 to make a buffer solution whose pH=6.90? pK a2 (H 3 PO 4 )=7.21.
Assignment The Purpose of this Assignment Submission of an ePortfolio is required for this class. Your Signature Assignment should address topics of personal interest, societal concerns, local, or even global issues, fro ...
Consider a 0.65 m column with van Deemter parameters A=0.22 mm, B=21.7 mm mL/min, and C=0.018 mm min/mL. If it takes at least 85 theoretical plates to fully separate two solutes, what range of flow rates can be used to s ...
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