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arrange the folloeing eluents in the increasing order of their euting power; place the least powerful eluent first; dichloromethane, pentane,water, and methonol.
The compound K2SiO 3 • χH2O is a hydrated crystal. It is analyzed for percent water in a procedure similar to the laboratory assignment with barium chloride
Aspartame (C14H18N2O5) is a solid used as an artificial sweetener. Its combustion produces carbon dioxide gas, liquid water, and nitrogen gas. What is the coefficient of aspartame in the balanced equation for the reaction? (Balance the equation wi..
A buffer solution contains 0.20M CH3CO2H and 0.34M NaCH3CO2. If 8.00 ml of 1.00 M HCl is added to 100.00 mL of this buffer solution. In what direction and by how much will the pH change?
A vinegar sample contained 5.20 % acetic acid. How may mL of 0.450 N sodium hydroxide would be required to titrate 25.00 mL of the vinegar sample
Based on the mass of caffeine, you can now determine the % weight of caffeine in the original tablet. How does this compare with what the packaging states?
Determine the delta H of decomposition of 1.000 mole of solid KCIO3 into solid KCI and gaseous oxygen.
You have successfully purified a protein to homogeneity. From gel permeation chromatography studies, you determine that the protein has a molecular weight for 235,000 daltons.
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed? C3H8 + 5 O2 → 3 CO2 + 4 H2O
Give examples of a neutral salt, acidic salt and basic salt. Explain your choice.
A zero-order reaction has a constant rate of 3.50×10-4 M/rm s. If after 65.0 seconds the concentration has dropped to 1.00×10-2 M, what was the initial concentration?
A gigantic balloon is filled to a pressure of 752 mm Hg at 12.5 ºC with pure helium gas. Once inflated, the balloon holds a total volume of 2.2 x 106 liters. How many grams of helium were used in this process?
Magnesium oxide decomposes into magnesium and oxygen. If 12.09 of magnesium oxide decomposes to form 7.29 of magnesium, what mass of oxygen gas is also released in the reaction?
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