In one sentence describe how fireworks get their color.

Which characteristics can be used to differentiate star systems? check all that apply.

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy