Given the information in the following table for the Group 7 elements, which of the following would not be a predicted property of technetium (Tc, Z=43)? Element Manganese (Mn) Technetium (TC) Rhenium (Re) Melting Point (°C) 1244 ???? 3180 AH vap (kJ/mol) 221 ???? 704 The AH vap of Tc is approximately 585 kJ/mol. The melting point of Tc is around 2200 °C. The highest neutral oxide of Tc is Tc207. The density of Tc is likely around 25.0 g/cm³. Density (g/cm³) 7.43 ???? 21.0 Highest Neutral Oxide Formed Mn₂07 ???? Re207

Given the information in the following table for the Group 7 elements, which of the following would not be a predicted property of technetium (Tc, Z=43)? Element Manganese (Mn) Technetium (TC) Rhenium (Re) Melting Point (°C) 1244 ???? 3180 AH vap (kJ/mol) 221 ???? 704 The AH vap of Tc is approximately 585 kJ/mol. The melting point of Tc is around 2200 °C. The highest neutral oxide of Tc is Tc207. The density of Tc is likely around 25.0 g/cm³. Density (g/cm³) 7.43 ???? 21.0 Highest Neutral Oxide Formed Mn₂07 ???? Re207

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

11- An unidentified metal crystallizes in a body-centered cubic lattice with an edge length of 351 pm. The density of the metal is found to be 0.533 g/cm³. What is the atomic weight? * Pm = 10-12 m
How much heat energy is required to convert 74.9 g of solid iron at 27⁢ ∘C to liquid iron at 1538⁢ ∘C? The molar heat of fusion of iron is 13.8 kJ/mol. Iron has a normal melting point of 1538⁢ ∘C. The specific heat capacity of solid iron is 0.449 J/(g·∘C). q= kj
Why do ionic compounds conduct electricity in the liquid state, but not in the solid state? Valence electrons can move from ion-to-ion in the liquid state, but not the solid state. Charged ions are free to move relative to one another in the liquid state. Electrons move through orbitals that are delocalized over the entire ionic compound. Electrons flow freely between ions in the liquid state, but are locked in place in the solid state.
Select the diagram that best represents solid barium iodide, Bal₂. O D Ο Ε A Ba+ |- Ba²+ E 12- Ba+ 8 B | Bat 88 D Ba2+ |
Using the information below, calculate how much energy (in kJ) is released when 12.0 g of water vapor at 113.0 ºC is cooled to 100 ºC and then condensed, GFM = 18.016 g/mol. Show all work and report you final answers to the correct units and significant figures. For H2O: Cs = 2.03 J/(g·°C) △Hfus = 6.02 kJ/mol Cl = 4.18 J/(g·°C) △Hvap = 40.7 kJ/mol Cg = 2.0 J/(g·°C)
The amount of heat produced in an "ice calorimeter " is determined from the quantity of ice that melts, knowing that it takes 7.01 kJ of heat to melt exactly 1 mol of ice. Suppose that a 1.45-g sample of Al2O3(s) at 60.6 °C is dropped into an ice calorimeter. How many grams of ice will melt?
Decide what kind of crystalline solid each element or compound in the table forms, and what kind of force holds the solid together. Then, rank the solids in order of decreasing melting point. That is, select "1" next to the solid with the highest melting point, "2" next to the solid with the next highest melting point, and so on. (You may need to use the scrollbar to see all the choices.) element or compound ΝΗ, ZnI₂ Ne type of solid force holding the solid formed together ? ? ? ? ? ? X melting point of solid ? ? ? G
With around 70% of ammonia produced industrially being used to make fertilizers. The specific heat capacity of liquid ammonia is 80.8 J/g*K while that of gaseous ammonia is 37.0 J/g*K. Given that the boiling point and enthalpy of vaporization of ammonia is -33.3°C and 23.5 kJ/mol, respectively, how much energy is required to heat 75 g of ammonia (17.03 g/mol) from the temperature of liquid nitrogen (-195.8°C) to room temperature (25.0°C)?
At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is solid. This is because of what?
Consider the data in the table. Compound Melting point (°C) AHrus (kJ/mol) Boiling point (°C) AH,ap (kJ/mol) HF -83.11 4.577 19.54 25.18 HCI -114.3 1.991 -84.9 17.53 HBr -86.96 2.406 -67.0 19.27 HI -50.91 2.871 -35.38 21.16 Using the data in the table, calculate ASs and AS for HF. vap ASs = J/(K - mol) ASvap J/(K - mol) Determine the entropy change when 8.40 mol HF(s) melts at atmospheric pressure. AS = J/K