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(ii) calculate the density of the material,given that its atomic weight is 141g/mol
(b) Molybdenum (Mo) has a Bcc crystal structure,an atomic radius of 0.1363nm and an atomic weight of 95.94g/mol. compute its theoretical density.
(a) calculate the activation energy for vacancy formation in aluminium,given that the equilibrium number of vacancies at 500 degree (773) is 7.57 x 10^23m^-3. The atomic weight and density (at 500 degree) for aluminium are respectively 26.98g/mol and 2.62g/cm^3
Problem- How many grams of phosphine (PH3, molar mass = 34.0 g/mol) can form when 62.0 g of phosphorus (P4, molar mass = 124.0 g/mol) and 78.4 L of H2 gas react at STP?
Give two reasons why ethuyl iodide is preferred over ethyl chloride in the Williamson ether synthesis.
What is the pOH of a solution that is prepared by mixing 25.0 mL of 0.200 M HNO3 and 25.0 mL of 0.150 M KOH
A solution contains 0.37 M Ni(NO3)2 and 0.37 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and..
What is the mechanism for the trans-esterification reaction of acetylsalicylic acid and methanol into methyl salicylate
Calculate oxalate ion in the resulting solution. volume change is negligible Calculate the Kb for the reaction that occurs when solid sodium oxalate is dissolved in water
Complete the following precipitation rxn with balanced molecular, total ionic, and net ionic equations.
four ice cubes at exactly 0 degrees c having a total mass of 55.0 g are combined with 120 g of water at 76 degrees c in
A. Epinephrine, C9H13NO3, has a concentration of 10-10 M in circulating blood. Calculate the diameter of a round swimming pool with a water depth of 2.0 M that would be needed to dissolve 1.0 g (about a teaspoon) of epinephrine.
A pure titanium cube has an edge length of 2.71in How many titanium atoms does it contain? Titanium has a density of 4.50 g/cm^3
Explain why dimerization of the cyclopentadiene is the side reaction and discuss how to avoid this side reaction.
Calculate the resulting discharge temperature and the required horsepower for one stage compression of the following gas properties. Construct a plot of such discharge temperature and required horsepower versus one stage compression ratios of 2, 3..
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