Question

butane gas has a density of 7.56 kg/m³. air has a density of 1.27 kg/m³. does butane sink or float in air?
true
false
t or f: water boils at 100 degrees celsius. this is a chemical property of water.
true
false

Explanation:

1. For the first statement, if butane gas has a density of 7.56 kg/m³ and air has a density of 1.27 kg/m³ (assuming standard - conditions for air density, and if the given density of butane is correct), a substance with lower density floats in a substance with higher density. So butane would float in air.
2. For the second statement, the boiling point of water at standard atmospheric pressure is 100 degrees Celsius. Boiling point is a physical property, not a chemical property. A chemical property involves a change in the chemical composition of a substance during a reaction, while boiling is a phase - change (physical change).

Answer:

1. True
2. False