if the half-line of substance A is 1.5 years, how long would it take 8.0 gram sample of substance A to decay such that only 1.0 gram remained

What is the number of moles in 15.0 g ash3?

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

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.