Test Sheet 1

Question 1

What is the definition of molar mass?

Answer 1

The mass of one mole of a substance in grams

Question 2

What is the symbol for the unit mole?

Answer 2

Mol

Question 3

What is the definition of avogadros constant?

Answer 3

The number of particles (atoms molecules or ions) in one mole of a given substance

Question 4

What number is avogadros constant?

Answer 4

6.02×10 to the power of 23 per mole

Question 5

What is the formula for calculating the number of moles?

Answer 5

Number of moles equals mass divided by MR

Question 6

What type of structures does nano science refer to?

Answer 6

Structure that are 1-100 nm in size, of the order of a few hundred atoms

Question 7

what is the diameter of a fine particle ( PM25)?

Answer 7

Between 100 and 2500 nm (1x10 to the power of -7 m and 2.5×10 to the power of -6 m)

Question 8

What is the diameter of a coarse particle (PM10)?

Answer 8

Between 2500 and 10,000nm (1x10 the power of -5 m and 2.5×10 to the power of -6 m)

Question 9

What are coarse particles more commonly referred to as?

Answer 9

Dust