Define Relative Atomic Mass (Ar). Why does it have no units?

Calculate the Relative Molecular Mass (Mr) of glucose, C₆H₁₂O₆. (Ar: C=12, H=1, O=16).

What is the Avogadro Constant, and what quantity does it represent?

How many moles are present in 40 g of sodium hydroxide, NaOH? (Ar: Na=23, O=16, H=1).

What is the mass of 0.25 moles of calcium carbonate, CaCO₃? (Ar: Ca=40, C=12, O=16).

Define the term "Molar Mass" and state its standard unit.

How many atoms are there in 24 g of carbon? (Ar: C=12).

Calculate the Relative Formula Mass of magnesium nitrate, Mg(NO₃)₂. (Ar: Mg=24, N=14, O=16).

What is the mass of one mole of oxygen gas (O₂)?

A flask contains 3 moles of ammonia (NH₃). How many molecules of ammonia are in the flask?

Differentiate between Relative Atomic Mass (Ar) and Molar Mass (M) for the element Sodium (Na).

How many moles of atoms are in 32 g of sulphur? (Ar: S=32).

If one mole of a substance has a mass of 58.5 g, what is its Relative Formula Mass?

How many oxygen atoms are there in 2 moles of water (H₂O)?

A sample contains 1.2 x 10²⁴ molecules of a substance. Approximately how many moles is this?