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Sodium carbonate is used in toothpaste where it acts as a foaming agent and an abrasive.
Calculate the mass in grams of solute needed to prepare 57 mL of a 0.622 mol/L solution of Na2CO3.
(Do not show your work in the space provided; record only your final answer with the correct number of significant digits and the proper units.)
a total of 17.34 ml of 0.122 m h2o2 titrant is required to completely neutralize 25.00 ml of an unknown concentration
what is the concentration of fructose in the resulting solution in uM? C) If you make three serial 1:5 dilutions, using the solution above, what is the concentration of the final solution?
Compute the moles of calcium phosphate that can be made by reaction of 0.420 moles of calcium hydroxide with 0.320 moles of phosphoric acid
What is the bubble point temperature at 2 atm. What is the dew point at 2 atm. What is the temperature if 50mole % is vapor?
The elements contained in acetylsalicyic acid are hydrogen, carbon, and oxygen. The combustion of 3.000 g of the pure compound yields 1.200 g of water and 3.72 L of dry carbon dioxide, measured at STP
Using information from the table of Standard Thermodynamic Data in the textbook, calculate the equilibrium constant, Keq, for the reaction given below at 298 K. C2H6O (g) ? C2H4 (g) + H2O (g) Keq =
Explain what is meant by a spontaneous process. Is a spontaneous process necessarily a rapid one? Explain, and provide a real reaction as an example to illustrate your answer.
Assume that you are an experienced organic chemist with perfect recrystallization technique. You recrystallize 10g of impure naphthalene from Ethanol in Corvallis, OR (elevation; sea level) and recover 7.4g of pure naphthalene.
Based on the following equation, determine the mass of a 50.0mL sample of your salt solution. Report the mass as a number and use all lower case letters to spell out the word(s) in the unit(s).
how much heat is released as the temperature of 12.7 grams of copper tubing is decreased from 94.7degc to 43.2degc? the
The concentration of the saturated solution of glucose in water is 4.0 M under standard conditions. Find the standard free energy of dissolution of glucose
Determine the new volume of a 1.3 L balloon if it is taken from room temperature that is twenty five degree celsius and placed into a freezer at the temperature of -11.5 degree celsius.?
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