The local weather station predicts thunder showers caused by a cold mass of air moving in on a warm air mass. This is what happens during an occluded front. Which weather map shows this happening?

One does not belong why? ice, gold ,wood ,diamond and table salt

What are the similarities of physical and chemical change ?

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.