Name of the product formed by the reaction of propylide ion and 2-chloropropane?

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Fossil fuels are organic compounds that are made from

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?