The thermochemical equation for the reaction of pentane and oxygen is shown below. What does the equation tell you about the reaction? C5H8(g)→ 5CO2(g) + 6H20(g)+3536 kJ
A. It is exothermic.
B. It has a low activation energy.
C. It has a high activation energy.
D. It is endothermic.

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.