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1.Phosphoric acis (H3PO4) is a triprotic acid. How many mL of 0.04800M NaOH is required to neutralize 0.02500L of 0.1600 M phosphoric acid? (Hint: 3 moles of NaOH would react with 1 mole of phosphoric acid.)
2. You have standardized the NaOH solution that has a concentration of 0.05418 M. You are given a bottle of vineaga(acetic acid) with an unknown concentration. You carefully measured 0.02500L of the vineagar and 39.84 mL of standardized NaOH solution was used in the titration. what is the concentration of the vinegar? (Hint : 1 mole of vinegar reacts with 1 mole of NaOH)
A solid Silver Group (Anion) unknowon that contains only sodium ion as a catio is acidified and divided into tow portions, to both of which 6 M HC2H3O2
What is the fate of acetyl CoA in the mitochondria in the presence of the following? (a) high ADP levels? (b) high NADH/NAD+ ratio? (c) low levels of oxaloacetate
Consider a light-sensative reaction. What energy in joules per photon, is needed to drive the reaction if delta H of the reaction is equal to 793 kJ/mol. (Remember that there are Avogadro's number of photons per mole of photons.)
Provide the structure of an aromatic compound with seven carbon atoms. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds)
A compound was analyzed and found to contain 40.00% carbon, 6.72% hydrogren, and 53.25% oxygen with a molar mass of 180.0 grams.
What mass of CCl2F2 substance must evaporate in order to freeze 109 of water initially at 24 degrees celsius? (The heat of fusion of water is 334 J/g the specific heat of water is 4.18 J/gK .)
A pound of coffee beans yields 30 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1.0 of coffee beans.
Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 490?
Find the pH of a solution that has a weak acid concentration of 1.72 M and a weak base concentration
In the manufacturing of computer chips cylinders of silicon are cut into thin wafers that are 3.00 inches in diameter and have a mass of 1.50 g of silicon
a sample of He gas has a volume of 900 mL and a pressure 2.50 atm at 298 K. What is the new pressure when the temperature is changed to 336 K and the volume is decreased to 450 mL?
In an ethanol-chloroform solution in which the mole fraction of ethanol is 0.20, the total vapor pressure is 304.2 torr, and the mole fraction of ethanol in the vapor is 0.138. Calculate the activity coefficients of the ethanol and the chloroform.
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