Determinar cuántas moléculas hay en 200 mg de aspirina (C9H8O4)

What is the study of how matter and energy interact? a. biology b. physics c. planetary science d. chemistry

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate