1.    Write the electronic configurations for the following elements:

·        Cl

·        Xe

·        Rb

·        Ti

2.    Write the Lewis structures for the following compounds:

·        CH3COOH (carbons are bonded to one another)

·        Dichloromethane (CH2Cl2)

·        Hydrogen peroxide (H2O2)

·        Hydrogen cyanide (HCN)

3.    Methane (CH4) behaves as an ideal gas under standard temperature and pressure conditions. What volume is occupied by 1 kg of methane at a temperature of 35 °C and a pressure of 0.9 atm?

4.    How much energy is released when an ice cube tray containing 250 ml of water freezes? The heat of fusion for water is 6.02 kJ/mol.