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Explain why is it possible to separate some compounds with identical boiling points by gas chromatography even though at all by distillation they cannot be separated, even fractional distillation?
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Suppose 1.7 g of zinc is treated with 6.2 g of pure hydrogen chloride. What is the maximum mass (in g) of hydrogen gas that can be produced?
You react 100.0 ml of a 1.01 M HBr(aq) solution with 99.1 mlof a 1.05 M KOH(aq) solution. The density of each solution is 1.04g/ml. The heat capacity of the calorimeter is 7.0 J/C. You observea ΔT of 6.3 C. Assume a 4.18 ...
You are required to read the following case study and prepare a Project Feasibility Study and Timeline based on the information contained in the case study. Residential Duplex Development Project You own a real estate ...
What is the subshell electron configuration for the Ca20 atom? Which are valence electrons and how many valence electrons are there?
If you carry out the reaction between table salt (NaCl) and copper(II) sulfate (CuSO4) in 100.0 mL of water, the salt copper(II) sulfate will behave similarly to the salts given in the tab named Slightly Soluble Salts. E ...
2KMnO 4 (s) → K 2 MnO 4 (s) + MnO 2 (s) + O 2 (g) If 2.50 L of O 2 (g) is needed at 1.00 atm and 20°C, what mass of KMnO 4 (s) should be decomposed? Assume the decomposition of KMnO 4 (s) goes to completion.
How many moles of magnesium ion are present in 5.25g Mg 3 (PO 4 ) 2 ?
Upon decomposition, one sample of magnesium fluoride produced 2.55 kg of magnesium and 3.99kg of fluorine. A second sample produced 1.40 kg of magnesium. How much fluorine (in grams) did the second sample produce?
Why do the instructions call for using a saturated solution of NaOH rather than one at lower concentration? Why can we ignored in the calculation of the concentration of NaOH?
A 1.526 g sample of a polymer dissolved in 1.00 L of a benzene solution at 22°C has an osmotic pressure of 4.52 x 10-2 atm. What is the molar mass of thepolymer?
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