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@X@user.full_name@X@ @GMU: What is the free energy change at 25°C for the reaction below, if ΔGfo(CH4(g) = -50.790 kJ/mol, ΔGfo(C8H18(g)) is 17.379 kJ/mol.C8H18(g) + 7H2(g) → 8CH4(g)

@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 16.27 g of kaolinite?

Nitric oxide, NO, is made from the oxidation of NH3 and the reaction is represented by the equation a NH3 + b O2 –> c NO + d H2O In the balanced equation, the correct coefficients for a, b, c, d are

@X@user.full_name@X@ @GMU: ACS-Using the given rate data what is the correct rate law for the reaction below?2NO + O2 ⇋ 2NO2  Exp [NO]o [O2]o Initial Rates, Ms-1 1 0.156 0.156 2.70e1 2 0.312 0.156 1.08e2 3 0.312 0.228 1.58e2

@X@user.full_name@X@ @GMU: A compound contains only strontium and fluorine. A sample weighing 2.76 g of this compound contained 1.93 g of strontium. How many grams of fluorine would there be in another sample of this compound containing 4.99 g of strontium?

@X@user.full_name@X@ @GMU: Closed-tube manometers work exactly as barometers except by connecting them to a container its pressure can be measured. Assume you have a closed-ended manometer filled with an oil having a density of 0.7958 g/mL at 20°C rather than mercury (density = 13.546 g/mL at 20°C). What is the pressure if the height of the oil column is 1126.49 cm?

@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 14.64 g of kaolinite?

@X@user.full_name@X@ @GMU: Determine the rate of formation of I3− if the initial concentration of I− was 0.4044 M and decreased to 0.3183 M after 0.2340 hours. Use the reaction below.3I−(aq)+ S2O82−(aq) → I3−(aq) + 2SO42−(aq)

@X@user.full_name@X@ @GMU: What is the wavelength of photons having an energy of 0.0151 kJ/mol. Remember Planck’s constant is 6.626×10-34 J×s

@X@user.full_name@X@ @GMU: Assume you have an open ended manometer filled with an oil having a density of 0.7432 g/mL at 20°C rather than mercury (density = 13.546 g/mL at 20°C). What is the pressure in atmospheres if the level of the arm open to the atmosphere is 129.48 cm lower than the level in the arm connected to the gas sample? The atmospheric pressure reading is 735.25 mm Hg.