Carbon dioxide and water
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1. water 2. silicon 3. bismuth 4. antimony 5. gallium pick two.
Reactants.
No, that's usually chemistry.
food, wood, (natural substaces)
calcium chloride
The initial substances in a reaction are called reactants.
Cotton is not naturaly water proof but there are substaces such as grease that may work as waterproofing agents
Pepper is molecular. It is composed of organic molecules such as piperine, which is responsible for its spicy flavor.
capilaries. pay attention in class.
Its because the membrane is Selectively Permiable. Since the openings in the membrane, called pores, have a certain size, only certain substances can pass through.