Chemistry Form 4

TOPIC: Mole Relationships                                 WEEK: June 1 to June 5

Determine the molar mass (in g/mol) for the following substances:

1. Na
2. C₈H₁₀N₄O₂ (caffeine)

Moles-Number of Particles Relationship:

1. How many moles of lithium are there in:

1. 1.2 x 10²⁴ lithium atoms?
2. 3.0 x 10²³ atoms of Na?

2. Calculate the number of atoms in each of the following amounts:
1. 1.004 mol Carbon (C)
2. 2.5 mol chlorine (Cl)

Mass – Atoms of Particles Relationship:

1. How many Boron atoms are there in 2.00 g of Boron?

2. Calculate the number of atoms in 54.0 g of Aluminum

Additional Practice:

1. How many moles of carbon dioxide are there in 66.0 g of dry ice, which is solid CO₂?

2. How many water molecules are there in 200.0 g of water?

3. The optimal daily intake dose of Vitamin C is 400 mg per day. How many moles of Vitamin C, also known as ascorbic acid, C₆H₈O₆, does that equal to?