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A sample of iron absorbs 67.5 J of heat, upon which the temperature of the sample increases from 21.5 celcius to 28.5 celcius. If the specific heat of iron is 0.450 J/g-K, what is the mass (in grams) of the sample?
Calculate the concentrations of all species in a 0.370 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid
Explain the efffect of temperature on the solubility of gases in liquid? What effect does pressure have on the solubility of gases in liquid( Henry's Law)?
How many litersof hydrogen gas will be produced by the decomposition of 90 L of water
Calculate the pH and molar concentration of each protonated form for a 0.133 M solution of NaHA.
A 35.00 mL sample of HNO3 solution is neutralized by exactly 42.63 mL of 0.4153 M KOH. What is the molarity of the HNO3 solution?
Write a balanced equation for the reaction that occurs in each of the following cases: (a) Cesium is added to water. (b) Strontium is added to water.
The variation of stress-concentration factor for a bar with fillet that is axially loaded shows that the kt approached infinity as the r/d ratio decrease.
A lactic acid/lactate ion buffer solution contains 0.31 M HC3H5O3 and 0.90 M C3H5O3-, respectively. The Ka value of lactic acid is 1.4x10^-4. Calculate the pH of this buffer.
Ascorbic acid (vitamin C) contains 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen by mass. Assume a 100-g sample of ascorbic acid. How many moles of carbon, hydrogen, and oxygen are present in a 100-g sample of ascorbic acid
Choose the stronger of each pair of acids, respectively, and explain why: a) HBrO3 or HBrO b) HBrO2 or HIO2 A. a) HBrO because Br has a lower oxidation state (fewer number of O atoms around it) in HBrO than in HBrO3
When the following two solutions are combined, a precipitate forms. CaCl2(aq) Rb3PO4(aq)Which of these is TRUE concerning the total ionic equation for the process
Calculate the pH of a buffer formed by mixing 95 mL of 0.13 M lactic acid with 85 mL of 0.15 M sodium lactate.
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