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Thiamine hydrochloride (C12H18ON4SCl2) is a water-soluble form of thiamine (vitamin B1;Ka = 3.37 X 10-7). Explain how many grams of the hydrochloride must be dissolved in 10.40mL of water to give a pH of 3.71?
Show how you might synthesize this compound from an alkyl bromide and a nucleophile in an SN2 reaction the compound is an OCH3 attached to cyclohexane
how much heat is released when 105 grams of steam at 100.0 degrees celsius is cooled to ice at -15.0 degrees celsius?
What mass of this substance must evaporate in order to freeze 150g of water initially at 15C? (The heat of fusion of water is 334J/g the specific heat of water is 4.18J/g*K.)
Compare the rate of effusion of NH3 with that of N2 at the same temperature and pressure. Compare the time required for equal numbers of moles of N2 and NH3 to effuse
296K(temperature), if you placed 2.58g of CrCl3*6H2O in a graduated cylinder and attempted the same experiment, what ?m would ypu observe?
The normal boiling and freezing points of substance X are 87.3 K and 84.0 K respectively. The triple point is at 82.7 K and 0.68 atmosphere. a. Draw a phase diagram for substance X. Label the regions in which the s,l, and g phases are stable.
Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes?
when 2.55 g of an unknown weak monoprotic acid ha molar mass 85.0 gmol is dissolved in 250.0 g of water the freezing
What are the complete and net ionic equations for silver nitrate and potassium iodide in a double displacement
How many moles of HCl are required to make 15.00 ml of an aqueous 2.500 molar HCl solution
Given the reaction 6CO2+6H2O-> C6H12O6+6O2. What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
how do you write the molecular amp net ionic equation for thereaction that occurs when aqueous solutions of lead
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