Can you help me ? directions at the top of the pic.. I only have 30 minutes to do it

How are the terms group and period used on the periodic table

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .