Grade9 -16-March-2022

Gas pressure is caused by

• gas molecules colliding with surfaces
• gas molecules condensing to a liquid
• gas molecules hitting other gas molecule
• barometers

• Gases do not move in straight line
• Most of the volume of gas is empty space
• Gas particles are not in constant random motion
• Gas particles attract each other

According to the Kinetic Molecular Theory a liquid's (SELECT ALL THAT APPLY)

• particles are held close together by intermolecular forces

• particles are in constant motion

• particles are vibrating in place and closely packed

• particles are not moving

Of these three states of matter, which one has the most kinetic energy? 

• Solid 
• Liquid 
• Gas

From 30 degrees to 55 degrees, what state of matter is the substance?

• Solid
• Liquid
• Gas
• Plasma

Which of the following is not true about the volume of a gas?

• Most of the volume is empty space.

• The volume is occupied by particles in continuous, rapid, random motion.

• The volume is about 10 times greater than that occupied by an equal number of particles in the liquid or solid state.

• Generally, the volume can be easily changed

What is the formula for Tin (IV) carbide?

• S₂C
• S₄C₂
• TiC
• SnC

What is the name of the compound with the formula; Ba(NO₃)₂?

• Barium nitrate
• Barium nitrite
• Barium nitride
• barium dinitrate

What is the NAME of....
Mg₃N₂

• magnesium (III) nitride
• magnesium (II) nitride
• magnesium (II) nitrogen
• magnesium nitride

The name of Fe(OH)₂ is

• iron oxide
• iron hydroxide
• iron (II) hydroxide
• iron dihydroxide