Considering intermolecular forces in the pure substance, which of these substances exists as a gas at 25 degrees celsius and 1 atm. a) Ne b) CH4 c) CO d)CCl4

R 0.0821 Lx atm Mol x K 1. 4.0 ml of a liquid weighs (has a mass of) 100.0 g. What is the density of the liquid? a) 0.400 g/ml b) 0.025 g/ml c) 0.04 g/ml d) 25.0 g/ml 2. What is the name of the change in phase from gas to liquid? a) Condensation b) Freezing c) Melting d) Boiling 3. What is the charge on a proton? a) +1 b)-1 c) 0

How many different types of intermolecular forces are there? Give 2 examples of each.

Consider the following experimental boiling points: CH4: -162°C C3Hg: -42°C C6H14: 69°C C9H20: 151°C Which of the following statements is correct for this set of compounds and supported by the data given? Select as many as applicable Select one or more: The molecule with the strongest intermolecular forces is C9H20 The C-C bond is the strongest covalent bond among the four molecules The dominant effect behind this trend is the strength of dipole/dipole forces OCH4 is the most polarizable molecule of the four C9H₂0 is the most polarizable molecule of the four The dominant effect behind this trend is the strength of dispersion forces