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Which is a compound?
Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less. Which best describes why?
This is the chemical reaction for the decomposition of carbonic acid into water and carbon dioxide.
                   H2CO3 -------> H2 +CO2
How does the reaction support the Law of Conversation of Mass?
Which would indicate the water in a lake was not safe for drinking? Â
A geologist identifies the identical index fossils in rock layers from two different areas. Which conclusion is BEST supported by this discovery?Â
Which supports the theory that some mountains were once at the bottom of an ocean?