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When 2.45 g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.255 C. Calculate Ka for the unknown weak acid.
how many grams of water can be cooled from 34degc to 26degc by the evaporation of 81 g of water? the heat of
what effect (shift to the right or left) does an increase in the temperature have on each of the following systems at equilibrium
A 245 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
MgNH4PO4.6H2O loses H2O stepwise as its is heated between 40 degree celcius and 60degree celcius the monohydrate is formed and above 100 degree celcius the anhydrous is formed what are the phosphorus percent of monohydrate and of the anhydrous mat..
Draw all stereoisomers having molecular formula C6H12 that contain one double bond and give the IUPAC name for each compound.
An organic compound containing lead was found to contain 21.70 C and 2.7% H. The lead content was found by dissolving 4.6201g of the compound in water and adding sodium sulfate. 3.100 g of lead precipitate was collected.
When there are 3 lone pairs around the central atom with 5 electron pairs, the lone pairs occupy which of the following. all axial positions one axial and two equatorial positions. two axial and one equatorial positions all equatorial positions
how many of joules of heat are needed to raise the temperature of 10.0g of aluminum from 22 degrees c if the specific
Consider a gas in a 1.0 L bulb at stp that is connected via a valve to another bulb that is initially evacuated. Answer the following concerning what occurs when the valve between the two bulbs is opened.
The transmittance of the mixture was read and compared to a calibration curve which indicated a concentration of I3^- as 5.52*10^-4 M. Calculate the following: c.) The concentration in moles/L of IO3^- in the original sample.
Simplest and most informative way to characterize a carboxylic acid is to determine its neutralization equivalent. The number of carboxyl group in the molecule of the following compound is 1.
The temperature inside a pressure cooker is 1150C. Calculate the vapor pressure of the water inside the pressure cooker.
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