Which of the following processes does not involve a change in chemical properties? rusting fermenting burning boiling

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?

Write and balance the chemical equation that represents the reaction of aqueous sulfuric acid with aqueous sodium hydroxide to form water and sodium sulfate. include phases.