How to know if a compound will decompose?

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

Name the element in group 17, period 2. (periodic table)

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.