Which case is an atom least likely to bond with other atoms

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?