Achange where compounds are formed or decomposed is a(n) physical change phase change nuclear change chemical change

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2