What equation shows that math is conserved in a chemical reaction

B2 + H2 2NH3

Find the protons, electrons and neutrons for strontium with a mass of 83

Which best describes how johannes kepler developed his laws of planetary motion

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.