Avogadro's number is derived from the number of carbon-12 atoms in 12.00 grams . In a chemical reaction, 3.0 moles of hydrogen react with 4.0 moles of oxygen to produce water. How many reacting molecules are present when the reaction starts?

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a voltaic cell that uses the oxidation of a fuel to produce electricity

explanation:

a) the particles of the chair are strongly held together.