Category: Uncategorized

Hund’s Rule is…

A Hydrocodone suspension to treat bronchitis contains 125mg/5.0mL suspension. The recommended dose is 15 mg/kg of body weight.  How many mL of this suspension should be given if the patient weighs 142lbs? DO NOT type in the units, only the numerical value.

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?