In a reaction, hydrogen gas is produced from 12.5 grams of phosphoric acid reacts with 15.7 grams of lithium. What volume will the hydrogen that is produced fill if the temperature is 20°C and the pressure is 876 mm Hg?

In apex! a liquid heated beyond a certain temperature becomes

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

What does a numerical subscript following an element in a chemical formula mean?