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A 5.000g sample of pesticide was decomposed with metallic sodium in alcohol, and the liberated chloride ion was precipitated as AgCl. Express the results of this analysis in terms of percent of DDT (C14H9Cl5) based on the recovery of 0.1606g of AgCl.
If I have hydrogen peroxide, molecular weight(g/mol) is 34.02, its density (g/ml) is 1.2, its concentration is 50% by weight and I have 2mL of it how many mols would I have
Calculate the lime dosage required for soften- ing by selective calcium removal for the following water analysis. The dissolved solids in the water are CO2 = 17.6 mg/L, Ca2 + = 63 mg/L, Mg2 + = 15mg/L, Na + = 20mg/L, Alk (HCO3- )
Calculate the solubility (in grams per 1.00*10^2 mL) of magnesium hydroxide in a solution buffered at pH=10. How does this compare to the solubility of Mg(OH)2 in pure water
An unknown metal weighing 13.11 g at a temperature of 81.0*C is placed in a calorimeter containing 25.0 mL of water at a temperature of 25.0*C. The final equilibrium temperature is 30.0*C. What is the specific heat of the metal?
Which one of these equations describes a redox reaction. 2Al+3H2SO4(aq)-->Al2(SO4)3(aq)+3H2(g), 2KBr(aq)+Pb(NO3)2(aq)-->2KNO3(aq)+PbBr2(s), CaBr2(aq)+H2SO4(aq)-->CaSO4(s)+2HBr(g), H+(aq)+OH-(aq)-->H2O(1), CO.-(aq)+HSO4-(aq)-->HCO3-(aq)+SO42-(aq)
If the heat capacity of the calorimeter was 25 J/C, what would the change in enthalpy (delta H rxn) for this reaction be
A sample of commercial hydrogen peroxide solution was analyzed using the procedure in this experiment. the results from three determinations were 3.03% ,2.89% and 3.22%
In a solution mixture of a 0.010M weak acid and 0.10M weak base, the measured pH was 4.75 at 24C. calculate the Ka of this weak acid. if 10mL of this mixture was then diluted with distilled water to a total volume of 100mL, what would be the new p..
Write the net ionic equations and calculate the enthalpy of neutralization for the net ionic equations:
Which group has the highest rank when precedence is assigned according to the Cahn-Ingold-Prelog system. a) -CH2(CH2)10CH3 b) -CH9CH3)2 c) -C(CH3)3 d) -CH2Cl e) -CH2(CH2)10Cl
Assume that a student places 1.0 mol of solid PbI2 in 1.0 L of water. Part of the lead iodide dissolves according to the following reaction PbI2(s) Pb2+ (aq) + 2I-(aq) After allowing the solution to sit for 30 minutes the student determines that th..
tincture of iodine is i2s dissolved in ethanol c2h2oh. a 1 solution of tincture of iodine is 10.0g of solute for 1000g
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