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Explain In preparing soap you dissolved 12.5 grams of sodium hydroxide in 32 ML of de-ionized water. The product was a solid cake of soap. Define what happened to the water you added when preparing your soap?
Calculate the change in entropy when 1.65 mol of a perfect gas with Cvm= 12 J K-1 mol-1 is compressed from 0.64 dm3 to 0.23 dm3 and at the same time heated from 186 K to 412 K. Hint: Entropy is a state function, meaning that the result is path ind..
0.250 g of a binary unknown acid, HX, requires 31.96 mL of a 0.09668M NaOH solution when titrated. What is the identity of the unknown acid.
which is exothermic as written. What would be the effect on the equilibrium position of increasing the volume of the reaction container
An electron in the n2= 5 level of an H atom emits a photon of wavelength 1282.17 nm. To what energy does the electron move. Is the photon in the visible region
1. for the following reactionnbspfe2o3 3 h2 -gt 2 fe 3 h2onbspif 6.3 g of fe2o3 is reacted with 15.8 g of hydrogen to
a 1.505 g sample of unknown was dissolved in 50 ml of benzenedensity 0.879 gml solution had melting point of 4.70
what is the wavelength (in nanometers ) of the spectral line that correspond the n=6 level to the n=1 level in the hydrogen atom
A soln was prepeared by dissolving 5.6 g of non electrolyte substannce in 45 g of water. the freezing point depression was .8 C. what is the molecular weight of this substance
a piece of sodium metal reacts completely with water as follows.2 nas 2 h2ol 2 naohaq h2gthe hydrogen gas generated
The empirical formula of styrene is CH, its molecular weight is 104.1. What is the molecular formula of styrene
An enzyme reaction, in 2ml of 0.08 M of an acetate buffer, pH=4.76. During this reaction 2micromol H+ was produced
The mass of a 0.106 mol of a compound is 6.366 g. What is the molar mass of this compound to three significant figures
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