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1. Using the table below determine any trends of density that might be related to the periodic table.Substance Density (g/L) Substance Density (g/L)H2 0.0899 O2 1.429He 0.1785 N2 1.2506Ne 0.9 Cl2 3.214Ar 1.7825 Kr 3.75F2 1.696 Xe 5.9
2. In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
3. Melting PointHalogen Melting pointF2 54 KCl2 172 KBr2 266 KI2 387 K
a. Graph the data above, put the melting point on the y-axis and atomic number on the x-axis
b. What trends if any do you notice from the data regarding melting point and the periodic table?
c. What is the predicted melting point of astatine? How did you determine the melting point? (Hint - use your graph)
How much would an empty volumetric flask, (weighing 27.16 grams, has a volume of 100.4 cm3 ) weigh when filled with bromine, an element that has a density of 3.1028 g/cm3.
Compute the composition of the crystals and the yield of the process. Also determine the composition of the mother liquor?
A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi. The elastic moduli of the concrete and steel are, respectively,
Estimate the change in entropy if fifty kilo joules of energy are transferred reversibly and isothermally as heat to a large block of Cu at zero degree Celsius and seventy degree Celsius?
Fundamentals of acids and bases - Water self ionizes to a small extent creating equal concentrations of hydronium and hydroxide ions. Find the molar concentration of these ions in water at 25 o C?
Explain why the boiling point of an aqueous solution that is 1.0 m in glucose (C6H12O6) is 100.51oC whereas The boiling point of an aqueous solution that is 1.0 m in NaCl is 101.02 oC .
Dalton law of partial pressure - The partial pressure of oxygen is maintained at 0.20 atm at this depth
Determine At what temperature does C 6 H 6 boil when the external pressure = 470 torr?
determine the molecule weight of the liquid and the density of the vapor under these condition?
Determine osmolarity of solution when 25.0 grams of aluminum chloride dissolves in 2.50 liters of H2O.
Correlation of structure with the melting point - What structural aspect of these 18-carbon fatty acids can be correlated with the melting point?
Using a solution containing 0.302 grams of an antibiotic has an osmotic pressure of 8.34 mmHg At 23.6°C, 0.500 L. calculate its molecular mass.
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