Answer: By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
Explanation:
I believe it is a Pure Substance
Answer:
His acceleration was -1/5 m/s²
Explanation:
<span>the answer is light microscopes.</span>