A science teacher placed a magnesium wire in flame. the wire turned white where the flame touched it. which statement best explains the chemical change A. a new substance formed

B. the magnesium wire dissolved

C. the substance changed state

D. the magnesium wire changed shape

the subject is science

What are the similarities of physical and chemical change ?

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

Explain what happens at the saturation point when adding salt to water at room temperature.