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Element X, a member of group 5A, forms two chlorides, XCl3 and XCl5. Reaction of an excess of Cl2 with 8.729g of XCl3 yields 13.233g of XCl5. What is the atomic mass and identity of the element X?
The endpoint in the titration is "overshot" A. is the reported molar concentration of the hydrochloric acid solution too high or too low. B. As a result of this poor titration technique, is the reported number of moles of B4O5(OH)4^2 would be too ..
What is the correct method for determining how many moles of calcium oxide are produced in the reaction of 10.g calcium with excess oxygen?
Why is the E isomer of 1,2-dibenzoylethylene more stable than the Z isomer? is this why irradiation goes from E to Z and not the other way around? also discuss polarity differences between the two isomers.
waters heat of fusion is 80 calg and is specific heat is 1.0 calg degree celcius. some velmobile set have been designed
How many milliliters of 0.0820 M NaOH are required to titrate each of the following solutions to the equivalence point. (a) 40.0 mL of 0.0950 M HNO3
A reaction mixture initially contains 1.6 L of A and 1.8 L of B. Assuming that the volume and temperature remain constant, what is the percent change in pressure if the reaction goes to completion?
In extracting an organic compound from an aqueous solutin, what is the practical advantage to having the organic solvent be more dense
H2 reacts according to the following equation representing the synthesis pf ammonia gas: N2(g) + 3H2(g)--> 2NH3 If 1 Liter of H2 is consumed, what volume of ammonia will be produced at constant temperature and pressure
Some ice cubes at 0 degrees C with a total mass of 379g are placed in a microwave oven and subjected to 750. W (750. J/s)of energy for 5.00 minutes. (Assume all energy of the microwave is absorbed by the water and no heat loss by the water.)
A 100.0-mL aqueous sodium chloride solution is 14.5% NaCl by mass and has a density of 1.12 g/mL. What mass of solute would you add to make the boiling point of the solution 104.2 degree C? (Use i = 1.8 for NaCl)
Write equations and show how the following molecules can be prepared from any organic and inorganic reagents.
Phosphate can buffer in three pH ranges. Give the chemical formulas of the buffer pairs and give the range in which each buffers. Start with H3PO4/ H2PO4-1
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