A pound of air is NOT a measure of pressure. A unit of pressure would be a weight ( a force really) for instance pound by a surface (square inch for instance).
Pound is a unit of weight only. At sea level on earth barometric pressure, 1 cubic metre weighs 1.2kg (or 2.64 pound). Which means 1 pound of air represents a volume of 0.379 cubic metre of air.
This obviously varies with atmospheric pressure (the air pressure) and the gravitional pull. a pound of air would represent a much bigger (6 times bigger roughly) volume on the moon for instance.
Both a Pound of Iron and a Pound of Air weight the same ... One Pound ... neither is 'heavier.'
They weigh the same. Both are defined in your question as a pound.
One pound of air is equal in mass to one pound of water
how much hot air do you need to pick up a 200 pound man
One pound. Or sixteen ounces. Or .45 kilograms. Whichever you prefer.
if you want to ground pound you have to jump and the R button in air
By the way you worded it, the answer is a pound of bread and here's why; since bread is a solid we know it is denser than air. You said a pound, which is the imperial measurment of mass and therefore you multiply the density of bread by mass to obtain the weight (the unit for weight is lb wt or pound weight. If you worded the question as "what weighs more a pound weight of bread or..." than your answer would be the same.
It weighs exactly 1 pound and it's all free... for now!
15 pounds of air to 1 pound of gas
One pound : 7,000 grains
Er....one
Weight doesn't tell you the volume. One pound of air, one pound of water, and one pound of gold all have vastly different volumes.