CHEMISTRY LEARNING CHECK YR.10

At higher temperatures

• particles in an object have less energy

• particles in an object move faster

• a gas contracts

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Particles in a ______________________ move quickly and are far apart.

• gas

• solid

• liquid

The slower the particles in a substance move,

• the colder it is.

• the warmer it is.

• the more energy it has.

The temperature of a substance increases as___.

• the substance expands
• the average kinetic energy of its particles increases
• the substance's volume increases
• the substance's mass increases

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4

Which equation is balanced?

• PbO₂ + 2H₂

• SO₂ + H₂0 --> H₂SO₄

• 2Na + 2H₂O --> 2NaOH + H₂

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

What law governs the balancing of chemical equations?

• Law of Energy

• Law of Conservation of Matter/Mass

• Law of Gravity

• Law of Matter Movement

What is the total number of atoms present in 5Na₃PO₄

• 5
• 40
• 55
• 8