Explain how to identify a starting point on a line? P. S this is for 8th grade science on edge

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide