Answer:
b
Explanation:
A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds.
The answer Is C.the layer of rock they're found in
6.2 grams of CO2 = 1.408786739226764 moles
Answer:
acids or bases can be tested
by chemical indicators
Answer:
Solids cant react to each other because they are the same room temperature
