A forest fire is considered a chemical change because of the changing of the wood by combustion, which is not a physical change.
Answer:
weaker and longer
Explanation:
Since there are 3 bonds in ethyne in comparision with the 2 bonds of ethyne between carbon atoms, they are attracted more to each other → the bond gets shorter . And since there are one more bond that supports the union → the bond gets stronger
thus the carbon-carbon double bond in ethene is weaker and longer than the carbon-carbon triple bond in ethyne
Answer:Since 1743 the Celsius scale has been based on 0 °C for the freezing point of water and 100 °C for the boiling point of water at 1 atm pressure. Prior to 1743 the values were reversed (i.e. the boiling point was 0 degrees and the freezing point was 100 degrees).
Explanation: i no it
A Nonrewnewable source is hard to get back from its source, while a renewable source is easy to get back from its source.
Example:
Nonrenewable: crude oil, oil, coal, fossil fuels, etc.
Renewable: sunlight, wind, biomass, rain, tides, waves and geothermal heat, etc.
