Which state of matter has particles packed tightly in a rigid structure? a) gas b) liquid c) plasma d) solid

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green