The half-life of a reactive chemical is 20 milliseconds. If you start with 1.76 grams, how much is left after 80 milliseconds?​

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

1 is the answer to this problem

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.