Analytical Chemistry chapter 3

What definition does "the average mass of one atom of the element compared to 1/12 of the mass of one atom of carbon-12" represent?

• Relative atomic mass, A_r

• Relative molecular mass, M_r

• Relative formula mass,M_r

• Relative mass, A_r

What is the relative molecular mass of water, H₂O?

• 16

• 18

• 8

• 6

In the following image, what does 12.01 represent?

• Atomic number

• Element symbol

• Atomic mass

• Proton number

What is the correct value of Avogadro's number?

• 6.023 x 10²²

• 6.023 x 10²³

• 6.023 x 10^-22

• 6.023 x 10^-23

What is the significance of Avogadro's number?

• to determine if the sample is correct or not

• To quantify an amount of substance in a sample

• Just cause....

• To quantify the amount of mass in a sample

Is this the correct relationship between moles?

• True

• False

How many mole of O₂ are there in 0.16 g of oxygen molecules.

• 0.005

• 0.05

• 0.001

• 0.01

What are the common apparatus used for simple titration?

• Pipette and burette ONLY

• Pipette, burette and graduated flask ONLY

• Pipette and graduated flask ONLY

• Burette and graduated flask ONLY

Name the following parts of the apparatus shown shown. (more than one answer)

• Pipette

• Pipette filler

• Burette

• Graduated flask

What is the use of a pipette?

• It gives an estimated volume of liquid

• It is efficient in making titration faster

• It does its job quickly

• It delivers a fixed volume of liquid