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A 235.0 ml sample of urine has a mass of 240.8 grams the specific gravity of the sample to three significant digits is?
A 20.0 mL sample of 0.150M KOH is titrated with 0.125M HClO4 solution. Calculate the pH after the following volumes of acid have been added.
If a student starts with 0.545 g of pure 4-aminobenzoic acid and ends up with 0.488 g of benzocaine, what are their theoretical and percent yields
sulfur dioxide was allowed to effuse through a small opening under constant pressure conditions. It required 179 s for 1.00 L of this gas to effuse. Calculate the effusion time of arsine (AsH3) under identical experimental conditions
Calculate the pH at the second stoichiometric point when 100 mL of a 0.020 M solution of sulphurous acid (Ka1=1.4*10-2, Ka2=6.3*10-8) is titrated with 1.5 M NaOH.
A solution is made by mixing 500 ml of .167 M NaOH with 500 ml of .100 M CH3COOH. Calculate the Equilibrium concentrations of H+, CH3COOH, CH3OO-, OH-, and Na+.
An air sample contains 0.034% . If the total pressure is 765 , what is the partial pressure of
choloine atom is more electronegative than carbon so there is a bond dipole alon the Cl-C bond why then is tetrachloromethane
Calculate the molar solubility of Fe(OH)2 in a buffer solution where the pH has been fixed at the indicated values. Ksp = 7.9 x 10-16.
how much heat is required to convert 27.0 grams of ethanol at 28 degrees celcius to the vapor phase at 78 degrees
Caffeine has a distrubution coefficient of 8.4 for methylene chloride/ water. How much caffiene will be extracted from a 200 mL cup of Turkish coffee (250 mg caffeiene) by 100 mL of methylene chloride?
The payment sugar beet growers receive is based on the sucrose content of their delivered beets. A sample is taken from each load of beets and the sugar content in the beets is determined by polarimetry of the beet extract. In a typical situation ..
Calcium and nitrogen react to form calcium nitride; 3Ca(s)+N2(g)-->Ca3N2(s). If 56.6 g of calcium is mixed with nitrogen gas and 32.4 g of calcium nitride is produced, what is the percent yield of the reaction
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