Assertion: balloon's density | /r/HasProperty | approximately 34 grams
Facets:
value: at 70 °f
type: LOCATION
value: at one atmosphere of pressure
type: LOCATION
Source sentences:
text: The density of air is about 0.075 pounds (or approximately 34 grams—a little more than an ounce) per cubic foot at 70 °F and one atmosphere of pressure.