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Cacodyl, which has an intolerable garlicky odor and is used in the manufacture of cacodylic acid, a cotton herbicide, has a molar mass of 209.96 g/mol.  Its mass composition is 22.88% C, 5.76% H, and 71.36% As.  (Yes, it contains arsenic).  A) What is the empirical formula? (type in answer without spaces and carat(^) signs) [1] B) What is the molecular formula? (type in answer without spaces and carat(^) signs) [2]  

Which of the following molecules have a linear geometry? 

 Determine the empirical and molecular formulas of ibuprofen, a common headache remedy. The analysis yields a molar mass of 206 g/mol and a percent composition of 75.7% C, 8.80% H, and 15.5% O. A) What is the molecular formula? (type in answer without spaces and carat(^) signs) [1] B) What is the empirical formula? (type in answer without spaces and carat(^) signs) [2]

An aqueous solution was prepared by dissolving 4.93 g of KI in enough water to make 500.0 mL of solution.  What is the molarity of KI in the solution? (molar mass of KI:  166.00 g/mol)

Silver nitrate, AgNO3, reacts with ferric chloride, FeCl3, to give silver chloride, AgCl, and ferric nitrate, Fe(NO3)3.  In a particular experiment, it was planned to mix a solution containing 25.0 g of AgNO3 with another solution containing 45.0 grams of FeCl3. 

@X@user.full_name@X@ @GMU: Using bond energies from the table, estimate ΔH for the reaction below.N2F4(g) → N2F2(g) + F2(g) Bond Energies, kJ/mol Single Bonds   H C N O S F Cl Br I H 432                 C 411 346               N 386 305 167             O 459 358 201 142           S 363 272 — — 286         F 565 485 283 190 284 155       Cl 428 327 313 218 255 249 240     Br 362 285 243 201 217 249 216 190   I 295 213 — 201 — 278 208 175 149   Multiple Bonds C=C 602 C=N 615 C=O 799 C≡C 835 C≡N 887 C≡O 1072 N=N 418 N=O 607 S=O (in SO2) 532 N≡N 942 O2 494 S=O (in SO3) 469

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for Po- in its ground state?

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for I3+ in its ground state?

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for Al3+ in its ground state?

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for Sc2+ in its ground state?