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a buffer solution was made to have 1.4M HF and 1.10 M NaF. If .1 moles of NaOH are added to 1.00 L of the buffer, what will be the pH? Assume the volume remains constant. Ka of HF = 7.2E-4.
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
A mole of photons in the blue visible region of the electromagnetic spectrum has an energy of 2.54 × 10 2 kJ/mol, calculate the frequency in s-1 of the photon.
Determining Copper in Brass, 1st I titrated Na2S2O3 and determined the molarity to be 0.164. I am having trouble with the calculations for the dissolution of brass.
A gas has a volume of 263 mL at 729 torr. What volume will the gas occupy at 368 torr if the temperature of the gas doesn't change?
Determine the maximum amount of P4S10(444.545 g/mol) that can be produced from 18.27 grams of Phosphorous (123.895 g/mol) and 9.42 g of sulphur (256.52 g/mol)
A compound contains 69.94 percent iron and 30.06 percent oxygen. What is its molecular formula if the molar mass of the compound is 199.55 grams per mole?
Explain how the carbonate system in natural waters provides buffering capacity
a buffer is prepared by mixing .200 mole of formic acid with .300 mole of sodium formate in a volume of 200 ml what is the initial ph.
Determine what volume of N 2 is released at 0.915atm of pressure and at the temperature of 25 degree celcius from a tank full of liquid N 2 ? (d=0.808g/mL)
What volume will contain 5.0 mol of aluminium? The density of aluminium is 2.7 g/ml.
In a chemical reaction (unbalanced equation), AsF3 + C2Cl6 = AsCl3 + C2Cl2F4, the theoretical yield of C2Cl2F4 was calculated to be 1.86 mol. If the percent yield in the reaction was 77.2%.
the pH of a saturated solution of a metal hydroxide MOH is 9.68. calculate the Ksp for the compound
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