Answer:
The water must reach 100 degrees Celsius in order for the water to start boiling. So the boiling point is an intensive property. Likewise, melting point is also an intensive property. Other examples of intensive properties include density , solubility, color, luster, freezing point and malleability.
420 eyyyyyyyy Only joking, the Mr of Cr ≈ 52 mass = molar mass*moles mass of Cr = 4.2* 52 = 218.4g If given 4.20, 3 significant figures is appropriate, so it would be 218g
Answer:
By making observations and doing experiments
1) make an observation that describes a problem, 2) create a hypothesis, 3) test the hypothesis
Answer: Option (B) is the correct answer.
Explanation:
Natural gas is defined as the gas which is formed naturally beneath the surface of Earth that mostly contains methane and small amounts of ethane, propane etc.
Since, natural gas upon burning produces water and carbon dioxide resulting in the release of a clean gas as compared to other fuels. Carbon dioxide produced upon burning of natural gas is 50-60% lesser in amount as compared to release of carbon dioxide upon burning of coal.
Therefore, we can conclude that burning coal produces more carbon dioxide than burning natural gas.
