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Gallium arsenide (GaAs) has the zinc blende structure. The gallium atoms are in FCC packing and the arsenic atoms occupy half the tetrahedral sites. Calculate the density of Gallium arsenide (GaAs) using the following data.
Covalent Radius Ga 1.26 Ångstroms As 1.19 Ångstroms
Atomic Mass Ga:69.7 g/mole As: 74.9 g/mole
Avogadro's number (NAv) is 6.02 x 10^23 atoms per mole.
Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures, estimate the boiling point of octane in Leadville, CO, where the atmospheric pressure is 496 mmHg. Various temperatures include: 400 mmH..
The reaction 2A (gas) = B (gas) is second order in A also has a half life of 1 hour. If the preliminary pressure of A is 1atm, explain what are PA and PB at t=1 hour and t = 2 hour
a sample of a certain beverage contains 1.00g of tartaric acid, H2C4H4O6. The beverage is titrated with 0.100M NaOH, how many millimeters of base are required to neutralize the tartaric acid.
How many grams of Mg2SO4 is required to make up 100mL of 20g/L Mg2SO4 solution in water?
when aluminum is heated in oxygen, aluminum oxide is formed. What weight of the oxide can be obtained from 25.0g of the metal.
a particular household ammonia solution d 0.97 gml is6.8 nh3 by mass. how many milliliters of this solution should be
Which of the following gases has the largest Henry's law constant, Kh, for dissolution in water at room temperature and why
If the CO2 and O2 in the above reaction are measured at the same temperature and pressure, 1. How many milliliters of O2 are produced per minute. At what rate is the Na2O2 consumed, in grams per hour
Calculate the standard enthalpy of formation of gaseous diborane (B2H6) using the following thermochemical information
methyl benzoate is an ester which is synthesised from benzoic acid methanol and sulfuric acid. methyl benzoate has a
A 70.4 g ice cube floats in the Arctic Sea. The temperature and pressure of the system and surroundings are at 1 atm and 0°C. Calculate Ssys, ?Ssurr, and ?Suniv for the melting of the ice cube.
Iron(III) oxide reacts with carbon monoxide. A reaction mixture initially contains 22.65g of Fe^2 O^3 and 15.46g of CO. Once the reaction has completely occured, what mass in grams of the excess reactant is left
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