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1) Niobium (Nb) has a BCC cubic crystal structure, and an atomic radius of 0.144 nm.
a) Calculate the edge length (d) of a niobium unit cell:
b) Calculate the density of niobium in g cm^-3
If the methane contained in 5.00L of a saturated solution at 25 ^circ rm C was extracted and placed under STP conditions, what volume would it occupy.
Based on this equation, what is the value of the Rydberg constant (R) in m-1? (5 significant figures)
A sample containing 0.187 g Cl- is dissolved in 50.0 mL water. How many moles of Cl- ion are in the solution? What is the molarity of Cl- ion in the solution?
If a 200 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.5 by 1.0 ft , what is the average thickness of the sheet in meters?
What is the mass percent of a sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 grams of water?
Calculate the following to determine Kc for FeSCN2+. a,) moles Fe3+ initially present. b.) moles SCN- initially present
A solution is prepared by dissolving 0.16 mol of acetic acid and 0.16 mol of ammonium chloride in enough water to make 1.0 { L} of solution. Find the concentration of ammonia in the solution.
An equilibrium mixture for the reaction above contains [H2] = 0.150 M, [I2] = 0.350 M, and [HI] = 0.500 M. What is the value of the equilibrium constant, Kc, for the reaction?
Draw all the resonance structures for the N2O4 molecule. The skeletal structure of the molecule is
Calculate the number of molecules inside the cell, which is 3.6um long and 1.2 um in diameter.
If 18.2 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia.
what is this equation and why is it central to the global warming theory: SO2(g) + H2O(l) H2SO3
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