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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
Calculate delta S for the heating of 1 mole of SO2(g) from 75°C to 1350°C at a constant pressure of 1 bar.
An iron ore sample is a mixture of Fe2O3 and several impurities. A 752. g sample of the impure iron ore is heated with excess carbon. Only the Fe2O3 present in the ore reacts with the carbon producing 341. g of carbon monoxide by the following rea..
Determine the pH of 263 ml of solution which has [NH4I] = 0.300 M. Kb = 1.74 × 10-5 for NH3(aq)
What volume of 0.420 M NaOH solution is needed to completely neutralize
Some observations through an experiment shows that a gas sample of 115 mili litres has a mass of 0.170 grams at a pressure of 711mmHg and a temperature of 34 degree celsius. Determine the molar mass of the gas.
If the copper is drawn into wire whose diameter is 8.50 mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm^3 .
The equilibrium constant, Kc, for the following reaction is 7.00E-5 at 673 k. Calculate Kp for this reaction at this temperature.
Calculate the amount of heat liberated (in kJ) from 347 g of mercury when it cools from 85.0°C to 15.0°C.
draw the mechanism for the ammonolysis of benzoyl chloride
What is the pH of a solution resulting from the addition of 11.9 mL of 0.20 M HCl to 50.0 mL of 0.12 M NH3? Assume the volumes are additive. Kb of NH3 = 1.8 10-5.
53.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 189 mL of water.
State the most likely primary alcohol and hydrogen halide needed for the preparation of 1 bromoheptane.
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