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What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (O) by mass? HCO
The compound has a molecular mass of 70. D) The compound contains a cyano or alkyne group. E) The compound contains a CO group
A current of 4.85 A is passed through a Cu(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.60 g of copper?
How many grams of magnesium chloride could be formed from the reaction of 6.82 g of magnesium with excess HCl?
determine the minimum length of a surface crack that will lead to fracture. Assume a value of 0.96 for Y.
Calculate the molar mass of the compound if given that normal freezing point of C6H6 = 5.5 oC , the freezing point depression constant for C 6 H 6 = -5.12 o C/m .
Using a proton NMR how could you experimentally determine that you have a trans isomer rather than a cis isomer of Chalcone
A 65.00 mL sample of HNO3 solution is neutralized by exactly 34.16 mL of 0.5841 M Ba(OH)2. What is the molarity of the HNO3 solution?
What gas escaped during the sodium bicarbonate washing. Write balanced equations for two reactions that took place during this operation.
A 20 degrees Celsius, the solubility of potassium nitrate is 30g in 100g of water. A 35 gram solution of potassium nitrate in water was determined to contain 10 grams of KNO3
For each of the following three questions 25.0 mL of 0.100 M pyridine (Kb = 1.70 x 10-9) is titrated with 0.100 M HCl. For each question calculate the pH of the final solution after the indicated amount of HCl has been added. That is, treat each q..
If 10.7mL of .105 M NaOH is required to reach the first equivalence point of a solution of citric acid, how many mL of NaOH are required to completely neutralize this solution
Find the pH of a 0.135 M aqueous solution of periodic acid (HIO4), for which
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