Chapter 3: The Mole Concept, Chemical Formula And Equation

Question 1

Relative atomic mass RAM is?

Answer 1

Is the mass of an atom compared to 1/12 of the mass of one carbon-12 atom.

Question 2

Why is carbon-12 atom choosen as the standard atom?

Answer 2

1. Solid at room temperature
2. Easy to handle
3. Has accurate mass

Question 3

Carbon dioxide CO2

RAM
Carbon 12
Oxygen 16

Find the Relative Molecular Mass

Answer 3

12+2(16) = 44

Question 4

How much particles does a mole of substance contain. State the name of constant number

Answer 4

1 mol of substance = 6.02 x 10^23 particles of that substance

AKA Avogadro constant

Question 5

Define molar mass of an atom/substance

Answer 5

The molar mass of an atom/substance is equals to the Relative Mass of the substance

AKA RMM or RAM

Question 6

What is the molar volume

Answer 6

Molar volume is the volume occupied by 1 mol of a gas

Question 7

Give the molar volume at Standard Temperature and Pressure STP

Answer 7

22.4 dm^3

Question 8

Give the molar volume in room conditions

Answer 8

24dm^3

Question 9

Convert 1dm^3 to cm^3

Answer 9

1 dm^3 = 1000dm^3