How this happen?

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.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?