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Niobium has a density of 8.55 g/cm3, an atomic weight of 93 and crystallises in body-centred cubic structure. Calculate the atomic radius of niobium using 4 significant figures.
a sample of n2o4g is placed in an empty cylinder at 25oc. after equilibrium is reached the total pressure is 1.5 atm
Question- A cylinder of length 4.56 in and radius 2.65 cm has a mass of 1.66 pounds. What is the density of the material in grams per cubic centimeter
Depict the Lewis structure (including resonance structures) for methyl aside (CH3N3). For each resonance structure, allocate formal charges to all atoms that have formal charge.
What is the mass of a single atom of gold in kilograms? Concentrated sulfuric acid has a density of 1.84g/mL. What is the volume of 50.0g of the acid? What is the mass of 50.0mL of the acid?
A solution if prepared by dissolving 20.2 mL of methanol, CH3OH, in 100.0 mL of water. The final volume of the solution is 118 mL. The density of the pure methanol is 0.782 g/mL while the density of pure water is 1.00 g/mL
Consider the following reaction at equilibrium. What effect will adding more H2S have on the system? 2H2S + 3O2 ---> 2H2O +2SO2
What is the enthalpy change when 1 mole of ammonia gas is decomposed into its elements?
a student used a dcp solution standardized to 9.94x10-4m to analyze a sample of extract from 3.50g of solid food. the
What is the vapor pressure (in torr) above a solution prepared by mixing 47.89 g of water, H2O, with 47.65 g of ethanol, C2H5OH, at 63.50 °C?
A 1.07g sample of a noble gas occupies a volume of 363mL at 35C and 678mmHg. Indentifythe noble gas in this sample
Compare the IR spectra of cinnamyl alcohol and cinnamaldehyde. What is the major difference
How many grams are contained in 2.00 mol of Neon - calculate the number of moles of 20.0 g He
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