Calculate the mass in grams for each of the following.1.13×1024 atoms of argon, Ar.

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

List four observations that indicate that a chemical reaction may be taking place