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At room temperature, soln of Ca(OH)2 (74.09 g/mol) contains 0.16 g of Ca(OH)2 per 100 mL of solution. What is the pH of this solution?
How many milliliters of 3.4 M NH4Cl must be added to 250 mL of 0.23 M NH3 to obtain a buffer solution having pH=9.40
The formula for the volume of a sphere is V=4(3.167)r^3/3. Assuming a spherical shape, calculate the mean diameter of a blood cell in centimeters.
The enthalpy change for the reaction of 50.0ml of ethylene with 50.0ml of H2 at 1.5atm pressure (problem ^H= -0.31kj. What is the value of ^E
How many additional milliliters of titrant are needed to reach the first equivalence point of quinidine dihydrochloride. What is the pH at the first equivalence point
A sample containing 2.20 moles of neon gas has a volume of 8.00 L. Assume that the pressure and the temperature remain constant. What is the new volume of gas in liters when a sample of 70.0 g neon is added to the neon gas already in the container..
KBr solution added to this colorless solution will cause pale yellow AgBr to precipitate. List the species, Cl-, NH3, or Br- in order of decreasing stability of the compounds or complexes that they can form with silver and explain your reasons.
Write a balanced radiochemical equation describing this process and the nuclide that forms. include all superscripts and subscripts representing mass and charge.
What mass of oxygen gas would be consumed by the complete combustion of 7.5g of a mixture of propane (C3H8) and butane (C4H10) in the mole ratio of C3H8 / C4H10 = 1.33
What is the pressure of the gas in this mercury manometer if h = 73 mm and atmospheric pressure
Explain the difference in the answers to question 2 and question 5. Which is the "correct" value for the concentration of the standard NaOH solution? Why?
determine what is the percent by mass of sodium phosphate in a 0.142m na3po4aq solution? if it is given that it has a
A 380. mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 630. mmHg. Calculate the moles of Ar present.
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