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Sulfur, S8, combines with oxygen at elevated temperatures to form sulfur dioxide. If 288 oxygen molecules are used up in this reaction, how many sulfur molecules reacted? In the reaction above, how many molecules of sulfur dioxide were formed?
How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.25 L of a 3.5 M H2SO4 solution?
A saturated solution of this substance was made in 0.01 M KlO3. The copper concentration was found to be 0.0012M. Determine the [IO3^-] and the Ksp of the substance.
calculate the pH of the 1 L solution of 0.25 M TRIS plus the addition of 0.05 M HCL. Show how many moles of TRIS and TRIS HCL are present after the addition of the HCL. Use the Henderson Hasselbalch equation to calculate the pH?
acid is dissolved in water to produce a 1.51 M solution. The pH of the resulting solution is 2.52. Calculate the Ka for the acid.
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508g/L at 25C and 721mmHg?
A solution of 2.40 grams of the unknown hydrocarbon dissolved in 26.7 grams of naphthalene is found to freeze initialy at 76.2 Degree Celsius. Caluculate the apparent milar mass of the unknown hydrocarbon on the basis of the freezing-point depress..
Enough of a monoprotic acid is dissolved in water to produce a 0.0197 M solution. The PH of the resulting solution is 6.41. Calculate the Ka for the acid.
Complete the following reaction and include All possible isomers of the product. One equivalent of each ligand is added to the reaction at the same time.
If 6.0 moles of ethene and 6.0 moles of hydrogen are introduced into a 2.0 L sealed vessel and allowed to equilibrate at 200ºC, what is the equilibrium concentration of the ethene
A mixture of 6.0 mol of H2(g) and 3.0 mol of O2(g) is placed in a sealed evacuated container made of a perfect insulating material at 26 Celcius. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the w..
Which of the following pairs of aqueous solutions will react when mixed?
Sodium azide (NaN3) is sometimes added to water to kill bacteria. Calculate the concentration of all species in a 0.010 M solution of NaN3. The Ka value for hydrazoic acid (HN3) is 1.9 * 10-5.
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