1. If air contains 78% N2. What is the solubility of N, in water at 25" & latm (KH 74.10 "mol/L)? 2. Calculate the mass percent of a solution containing 47.5 g of ethanol (CH.3CH,2OH) and 185ml of
LIO (Assume density of water = 1.0g/ml),​

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.