Which of the following substances represents a compound?
A. saline: NaCl and H,0
B. helium: H
c. carbon dioxide: CO
D. iron; Fe

What is an example of a physical property?

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

7. in the cycle, a virus integrates its dna into the host's dna, and its dna is replicated when the host dna is replicated. a. infectious b. retroviral c. lysogenic d.lytic