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Niobium has a density 8.55 g/cm3 , an atomic weight of 93 and crystallises in body-centred cubic structure. Calculate the atomic radius of niobium atom.
Figure it out without rounding decimal numbers.
The element antimony has an atomic weight of 121.757 amu and only two naturally occuring isotopes. one isotope has an abundance of 57.3 % and an isotopic mass of 120.904 amu based on these data what is the mass of the other isotope.
A FM radio station broadcasts at a frequency of 89.7 MHz. (WCPE) How far away from the transmission antenna must you be in order to properly use a radiological survey instrument that measures in power density
Problem- The Ksp of magnesium fluoride is 6.4x10^-9. Calculate the solubility in grams per liter of magnesium fluoride in water.
Calculate the value ??of [OH-] from the given values in each solution and then label the solution as acidic or basic:
Question- 18.7 L N2 at 25 °C and 125 kPa and 31.1 L O2 at 25 °C and 125 kPa were transferred to a tank with a volume of 4.00 L. What is the total pressure at 37 °C
Patients with a high body temperature are often given "alcohol baths." The heat of vaporization of isopropyl alcohol (rubbing alcohol) is 159 cal/g. How much heat is removed from the skin by the evaporation of 190g about 1/2 cup) of isopropyl alco..
how many liters of carbon dioxide are produced from the complete combustion of 88 grams of propane at STP
The enthalpy of vaporization of chloroform (CHCl3) is 29.4 kJ mol-1 at its normal boiling point of 334.88 K.
Treatment of A with zinc amalgam and HCl affords an optically active, dextrorotatory hydrocarbon C. Identify compounds A, B, and C, including stereochemical configurations. Be sure to explicitly draw H and both wedge/dash bonds at any configuratio..
Calculate the cell potential (Ecell) of an electrochemical cell with Mg/Mg2+ and Fe/Fe2+ electrodes. [Mg2+] = 0.200 M and [Fe2+] = 0.050 M.
In the lower troposphere, ozone is one of the components of photochemical smog. It is generated in air when nitrogen dioxide, formed by the oxidation of nitrogen monoxide from car exhaust, reacts by the following mechanism.
When 33.5 mL of 0.580 M H2SO4 is added to 33.5 mL of 1.16 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ?H of this reaction.
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