Answer:
Handpicking right?
It is a very simple and easy method of separation. It doesn't require any kind of equipment to proceed. It takes very less time when performed for small quantity of mixture. It doesn't require any kind of preparation
Answer:
B. NO₂, nitrogen dioxide
Explanation:
Nitrogen dioxide is one of the oxides of nitrogen. It reacts highly and is very harmful for the health of humans. It is regarded as one of the pollutants of the air pollution. The chemical formula of Nitrogen dioxide is NO₂. This gas is produced during the manufacturing of the fertilizers in the industries. Burning of the fossil fuels also contribute in the emission of nitrogen dioxide. Two atoms of oxygen when reacts with one atom of Nitrogen, Nitrogen dioxide is formed.
Explanation:
Atomic Number Element Symbol
Chlorine. Cl
Argon. Ar
Potassium. K
Calcium. Ca
It has six significant figures. You count the 0s that come at the end because it shows you it wasn't rounded.
