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(a) What is the trend in first ionization energies as one proceeds down the group 7A elements? Explain how this trend relates to the variation in atomic radii.
(b) What is the trend in first ionization energies as one moves across the fourth period from K to Kr? How does this trend compare with the trend in atomic radii?
A sample of air at STP is determined to contain 77% nitrogen, 21% oxygen, 0.5% water vapor, 0.5% carbon dioxide, and 1% of inert gases etc. Explain what is the partial pressure of water vapor in this sample
dropped into flask containing dilute H2SO4 at a pressure P = 1.00bar, and temperature T= 325K. What is the reaction that occurs?
calculate the molar solubility of calcium carbonate in 0.050 molar calcium chloride and ksp for calcium chloride is 3.8X10^-9.
A 0.750 L volume of 0.0309 M KClO4 is condensed to a volume of 500 mL, calculate the molarity (M) of K+ in the new solution. Molar Mass (g/mol)
an automobile gasoline tank holds 27kg of gasoline when the gasoline burns 85kg of oxygen is consumed and carbon
How can 1-bromopropane be used to prepare each of the following. (a) ethanal (b) propanone
the concentration of silicon in an iron-silicon alloy is 0.55 wt. what is the concentration in kilograms of silicon per
In a battery, water is used as a salt bridge, and the two electrodes are Carbon and Aluminum. Find the standard reduction potential of the battery, and indicate which electrode is the cathode and anode.
calculate the molarity and the molality of an nh3 solution made up of 27.5 g of nh3 in 70.0 g of water. the density of
How do we know the oxidation of camphor leads to a different product if they look/smell the same in the end as it did in the beginning?
They have a polar end b. The have a hydrophobic end c. The are often sodium slats of long chain fatty acids. d. The hydrophilic end of the soap molecules is attracted by grease. e. they precipitate in water that contains Fe3+ ions
The boiling point of a substance is defined as the temperature at which liquid and vapor coexist in equilibrium. Use the heat of vaporization (30.91kJ/mol) and the entropy of vaporization
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