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The first law of thermodynamics states that energy can neither be created nor destroyed. Energy has to be used when breaking bonds, yet is formed when making bonds. This means that there will be an overal...

The reaction between calcium carbonate and hydrochloric acid produces carbon dioxide.  The carbon dioxide could be collected in a gas syringe or in a measuring tube inverted and filled with water.  The ra...

Same number of protons (6 protons - atomic number) and different number of neutrons (6 neutrons in C-12 and 8 neutrons in C-14).

A heterogeneous catalyst a catalyst that is in a alternative phase/state to the reactants. The first stage of catalysis by a heterogeneous catalyst is absorption of the reactants onto the surface of the c...

Concentration of HCl, Mass of marble chips (use excess HCl).