1. The problem statement, all variables and given/known data Can anyone help me with this problem? A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m^3. The density of air is 1.3 kg/m^3. What is the average density of the balloon? 2. The attempt at a solution MY ATTEMPT: density = mass/volume = 2/5 = .4 This is the density of the balloon and gas. I'm tempted to leave this answer as it is but it just doesn't seem right. I thought if I added the density of the air to the density of the balloon and then divided by two I would get and average. EX. 1.3 + 0.4 = 1.7........ 1.7/2 = 0.85 kg/m^3 Does this seem logical to you or are there some steps that I'm missing?