Mr and Ar

The relative atomic mass is the average mass of an atom compared to 

• the mass of a carbon-12 atom.
• 1/12 the mass of a carbon-12 atom
• the mass of a hydrogen atom
• 1/12 the mass of a hydrogen atom

The relative molecular mass of a compound is equal to the sum of its

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

What is the relative atomic mass of sodium?

• 11
• 23
• 46
• 64

What is the relative molecular mass of fluorine gas, F₂?

• 19
• 38
• 9
• 18

What is the relative formula mass of NaOH?

• 20
• 39
• 40
• 45

What is the relative molecular mass of CO₂?

• 12
• 16
• 32
• 44

What is the relative atomic mass of sodium?

• 11
• 23
• 46
• 64

Find Atomic Mass: What is the mass of one mole of Lithium (Li)?

• 6.9 grams

• 14.0 grams

• 22.9 grams

• 56.9 grams

How many atoms of NITROGEN are in S(NH₄)₂ ?

• 0

• 1

• 2

• 4

Calculate the Mr of PbSO₄.

• 207 amu

• 32 amu

• 303 amu

• 1,020 amu