How to do these problems. Also I know the equation for molality is mol/kg so how do you do this with number 1?
1. Calculate the molality of a solution formed by dissolving 42.3 g of LiBr (MW = 86.8 g/mol) in 650.0 mL of water and 25 °C (Density of water 0.997 kg/L). A. 0.065 m B. 0.752 m C. 0.013 nm D. 3.20 m E. 0.015 m 2. Given the following substances, identify whether each will be highly soluble in water, pentane (C5H12), or both. Pentanol Propanol (CH3CH2CH2CH2CH2OH) NaCI (CH3CH2CH2OH) Water Water Both Water Water A. C. D. E. Both Both Both Pentane Both Both 3. When helium is placed in a container of neon, the helium spontaneously disperses throughout the neon because A. of solvent-solute interactions B. the dispersion of helium atoms leads to dispersion of energy C. of the large attractive forces between helium and neon atoms D. of hydrogen bonding E. a decrease in energy occurs when the two mix 4. Given the following solutions, place them in order from smallest to largest boiling point elevation. Consder all of the salts as strong clectrolytes. a. 0.4 m KBr b. 0.5 m Ethanol e. 0.2 m CaCl d. 0.4 m Li2S e. 0.4 m FeCl Smallest Largest B. a
