Explanation: Oxygen and Carbon are both elements, so they can’t be compounds. Air is a mixture of gasses, not a compound.
Answer from: Quest
the second one and the forth one are in the purple because they are opinions and the rest are in the yellow
explanation:
Answer from: Quest
the answer is b ) square root of 5
Another question on Physics
Physics, 21.06.2019 20:00
Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.
Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter