@X@user.full_name@X@ @GMU: The density of a particular gas is 3.8579 g/L at 774.23 mm Hg and 22.93 °C. What is the molecular mass of the gas?

@X@user.full_name@X@ @GMU: Kaolinite, a clay mineral with the formula Al4Si4O10(OH)8, is produced naturally by the chemical weathering of aluminum silicate minerals like feldspar (granite). Kaolinite is used industrially as filler in slick-paper for magazines and as a raw material for ceramics. How many grams of oxygen are present in 12.00 g of kaolinite?

@X@user.full_name@X@ @GMU: What is the energy of a photon having a wavelength of 192.52 pm? Remember Planck’s constant is 6.626×10-34 J×s

@X@user.full_name@X@ @GMU: Which of the answers below is the correct representation according to the shorthand method of the following cell?Fe3+(aq) + Cr(s) → Fe(s) + Cr3+(aq)

@X@user.full_name@X@ @GMU: A flexible container was filled with CH4 gas at a pressure of 1.120 atm and volume of 16.805 L. What volume would this same gas occupy if the pressure increased to 2.714 atm? Assume temperature is constant.

@X@user.full_name@X@ @GMU: Balance the reaction below; determine the sum of the coefficients; this is in a basic solution! Include co-efficients for any unshown species(such as water and hydroxide)._MnO4- + _I- → _MnO2 + _I2

All drugs have side effects.

@X@user.full_name@X@ @GMU: Using bond energies from the table below, estimate ΔH for the reaction below:H2CO(g) → H2(g) + CO(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 CºC 835 CºN 887 CºO 1072 N=N 418 N=O 607 S=O (in SO2) 532 NºN 942 O2 494 S=O (in SO3) 469

@X@user.full_name@X@ @GMU: Kaolinite, a clay mineral with the formula Al4Si4O10(OH)8, is produced naturally by the chemical weathering of aluminum silicate minerals like feldspar (granite). Kaolinite is used industrially as filler in slick-paper for magazines and as a raw material for ceramics. How many grams of oxygen are present in 10.00 g of kaolinite?

@X@user.full_name@X@ @GMU: ACS-What mass of zinc would be plated on an electrode from a solution of Zn(NO3)2 at a current of 5.00 A for 593.42 s?