PLEASE HELP ME I BEG YOU ITS DUE SOON AND I DONT KNOW THE NUMBER OF ATOMS HELP?!?!

Compare and contrast physical changes with chemical changes.

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear