i need help with these simple Problems.....mostly naming...?

Question

74) Gasses expands to fill a vacuum. Why does earth's atmosphere gases not escape into the near-vacuum of space?
78) Name each compound:
A) SnBr2
B) BaSO4
C) Mg(OH)2
D) IF5
82) Classify the TYPE of each reaction:
A) Calcium reacts w/water to form calcium hydroxide & hydrogen gas
B) Tetraphosphorus deoxide reacts w/water to from phosphoric acid
C) Mercury & Oxygen are prepared by heating mercury (II) oxide
D) Aluminum hydroxide and hydrogen sulfide from when aluminum sulfide reacts w/ water.

2) is kelvin temp of gas if tripled, & Volume is double, the new pressure will be: (choose)
A)1/6 of original pressure
B)2/3 ''
C)3/2 ''
D)5 X ''
6)Real gasses like ideal gas when:(choose)
A) high pressure, low temp
B) Low P, High Temp
C)Low p, Low Temp
D) High P, High temp

Answer 1

If you are having problems naming compounds, then giving you the answers without instruction will not solve anything but this one isolated problem. If you will tell me what you do not know when asked to name compounds, I would be glad to help you so you can do this on your next test when you are given different compounds to name.

CHEMISTRY TEACHER