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How many miles of carbon atoms are present in a 25 gram sample
If each of the following mixtures were analyzed by thin-layer chromatography, which substance would have the largest Rf? The smallest Rf? Explain.
(a)What is the coordination geometry about the vanadium ion incrystals of the alum? Write balanced equations for each reduction step
calculate the molarity of acetic acid in a vinegar sample knowing that 5.00 ml of vinegar requires 43.50 ml of 0.105 m
How many grams each of the following, per 1000g of water in your car radiation, are needed to give equal protection against freezing down to -10 degrees C? (a) Methyl alcohol, CH3OH (b.p. 65 deg C), (b) ethyl alcohol,
Calculate the molar solubility of barium sulfate a) in water, and b), in a solution containing 0.60 M of sodium sulfate.
what is the concentration of solute particles or ions in moll present in 1 l of the following aqueous solutions? assume
CaCO3(s) CaO(s) + CO2(g) H°rxn = 175 kJ How will the amount (not concentration) of CaCO3(s) change with the following stresses? CO2(g) is removed. CaO(s) is added. The temperature is increased. The volume of the container is decreased.
heat flows measured in this experiment were actually not for simple neutralization of a proton and hydroxide ion as
Calculate the expected change in temperature for 1.7 g of NH NO dissolved in 50.0 2 cal mL of H O. Assume that the calorimeter absorbs no heat. (ie. C =0)(Remember to use dimensional analysis
A solution is prepared by dissolving 411g of sucrose in 646g of water. What is the vapor pressure of this solution at 30C
If 27.0 mL of 0.0200 M KMnO4 were required to titrate a 0.425 g sample of K3[Fe(C2O4)3] * 3H2O, what is the % purity of the complex
Alcohols are less volatile than ethers of the same molecular weight, but the two classes of compounds have approximately the same solubility in water because
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