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45.0 mL of 0.35 M NaOH is neutralized by 25 mL of an HCl solution. The molarity of the HCl solution is what?
Problem- You would like to create a reflection grating like the one shown at the right, with an incident angle (θ) of 49 °. Calculate the number of lines per centimeter that should be etched in the grating for each of the following conditions
a solution of ethanol c2h5oh in water is prepared by dissolving 72.0 ml of ethanol density 0.79 gcm3 in enough water
The temperature of 3.0L of an ideal gas is raise from -50C to 100C at constant pressure. Explain what is the final volume of the gas. Explain what is the pH of a 0.02molL-1 solution of sulfuric acid. Presume complete dissociation
Question- The electrochemical cell described by the cell notation has a standard emf of 0.68 V. Calculate the maximum electrical work (kJ) the cell has done if 1.7200 mol of MnO4-(aq) (Molar Mass - 118.94 g/mol) reacts. Round your answer to three ..
Problem- What is the concentration of Flouride ions (in M) in a 5.09 M solution of (CoF3) cobolt (iii) fluoride
A chromatographic column is packed with spherical particles of radius R that are coated withan immobilized enzyme, lactate dehydrogenase. The enzyme converts pyruvate (A) into lactate(B) at the particle surface in a reaction that has pseudo first-..
what is the concentration ratio of the free (and potentially toxic) Pb2+ (aq) in the blood to the much less toxic Pb 2+ - EDTA complex?
The internal energy of a perfect gas does not change when the gas undergoes isothermal expansion. what is the change of enthalpy
Permenant sterility in women occurs at 300.0 rem of exposure. The source radiates with 3540 rem at 500.0 cm.
What term expresses the ratio of moles of reactants and products according to the coefficients in the balanced chemical equation?
Assuming the following reaction proceeds in a forward direction Cu2+(aq)+Ca(s)----> Cu(s) + Ca2+(aq) Which one is oxidized and which one is reduced
At 63.5C the vapor pressure ofH2O is 175 torr, and that of ethanol,C2H5OH, is 400 torr. A solution is madeby mixing equal masses of H2O andC2H5OH.
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