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Calculate the acidity (H+ concentration) of a carbonated beverage which is 0.15 M carbonic acid, H2CO3. Use only the first ioization constant for H2CO3 to HCO3 , which is 4.4X10^-7
traces of iron and titanium. If the sapphire were found to contain 0.155 g of oxygen, what is the mass of the gemstone?
a solution of sodium cyanide (NaCN) has a pH of 12.10. How many grams of NaCN are in 425 mL of solution with the same pH
Identify invent a salt which has a weak acid as it's cation and a weak base as its anion so that the salt would yield an acidic solution in water.
what is the enthalpy of vaporization of acetone ch3coch3 at its normal boiling point of 56.2?c? the entropy of
Acetic acid, CH3COOH, is a weak monoprotic acid (pKa=4.74 at 25oC). What is the pH of 0.191 mol/L CH3COOH(aq) at 25oC
Calculate the partial pressure of water above the solution, in torr.The vapor pressure of pure water at 55°C is 118.0 torr. The MW of lactose is342.3 g/mol
A certain substance has a molar heat of vaporization of 31.6 kj/mol. How much of the sunstance is in a sample that requires 57 kj to vaporize.
For which of the following transitions would a hydrogen atom absorb a photon with the longest wavelength? a) n=1 to n=2 b)n=2 to n=4 c) n=5 to n=1 d) n=7 to n=6 e) n=5 to n=6
If the formula for magnesium fluoride is MgF 2 and the formula for potassium chlorate is KClO 3 , then what is the formula for magnesium chlorate?
Calculate the volume occupied by 15.4 g of carbon dioxide at STP, assuming ideal gas behavior.
The molar solubility of AgCl in 6.5 x 10^-3 M AgNO3 is 2.5 x 10^-8 M. In deriving Ksp from these data, which of the following assumptions are reasonable? A) Ksp is the same as solubility.
A vapor composed of 0.45 mole fraction ethanol and 0.55 mole fraction acetic acid at 120.0 mmHg (absolute), is in equilibrium with a liquid phase also composed of ethanol and acetic acid.
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