In an exothermic reaction, the average kinetic energy of the particles of matter ib the products 1. decreases
2.stays the same
3. increases

What is the temperature of one mole of helium gas at stp?

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.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)