Mini-Mole Labs: Just How Many in a Mole

Mini-Mole Labs: Just How Many in a Mole?

Name: ______Date ______Period 1 2 3 4 5 6 7

Calculations MUST show your work including units!!

Procedure A: How many water molecules are in a mouthful of water?

Fill a paper cup with water. Wipe off the outside. Determine the mass and record it. Drink one mouthful of water. Wipe off the outside. Reweigh the paper cup and water and record it’s mass. Throw away the cup!! Molar Mass of water : ______g/mol

Data:

Mass of paper cup and water before drinking: ______g

Mass of paper cup and water after drinking:______g

Calculations:

Mass of water swallowed:______g

Moles of water swallowed:______mol

Number of water molecules swallowed:______cules

Procedure B: How many aspirin molecules are in an aspirin tablet?

Weigh a plastic weighing boat and record its mass. Add an aspirin tablet to the weighing boat and reweigh. Record the mass of the weighing boat + tablet. Return the aspirin tablet to its container.

Aspirin’s chemical name is acetylsalicylic acid and its formula is C9H804

Molar Mass of aspirin : ______g/mol

Data:

Mass of weighing boat: ______g

Mass of weighing boat + tablet: ______g

Calculations:

Mass of aspirin tablet:______

Moles of aspirin in tablet:______

Number of aspirin molecules in tablet:______

Procedure C: How many formula units of chalk does it take to write your name?

Weigh a piece of chalk on an electronic balance (sig figs will be different from other stations). Write your full name on a piece of black paper. Reweigh the chalk. How many formula units of CaCO3 did it take to write your name?

Molar Mass of chalk : ______g/mol

Data:

Mass of chalk before writing:______

Mass of chalk after writing:______

Calculations:

Mass of chalk used to write your name:______

Moles of chalk used to write your name:______

Formula units used to write your name:______

Procedure D: How many formula units are in a teaspoon of salt?

Weigh a plastic weighing boat and record its mass. Add a teaspoon of salt, reweigh and record the mass. Return the salt to its container. Molar Mass of sodium chloride: ______g/mol

Data:

Mass of the weighing boat:______

Mass of the weighing boat and salt:______

Calculations:

Mass of salt:______

Moles of salt in a teaspoon:______

Number of formula units of sodium chloride in a teaspoon:______

Procedure E: How many sugar molecules are in a teaspoon of sugar?

Weigh a weighing boat and record its mass. Add a teaspoon of sugar to it, reweigh and record its mass. Don’t eat the sugar. Many hands have touched.

Table sugar is actually sucrose, a chemical compound with the formula: C12H22O11

Molar Mass of sucrose : ______g/mol

Data:

Mass of weighing boat:______

Mass of weighing boat and sugar cube:______

Calculations:

Mass of sugar:______

Moles of sugar in one tsp sugar :______

Number of molecules of sucrose in a tsp sugar: ______

Procedure F: How many carbon atoms are in a charcoal briquette?

Weigh a weighing boat and record its mass. Place a charcoal briquette in the

weighing boat and determine the total mass.

Molar Mass of carbon : ______g/mol

Data:

Mass of weighing boat: ______

Mass of weighing boat and charcoal briquette: ______

Calculations:

Mass of carbon (assume the briquette is 100% carbon): ______

Moles of carbon in one briquette:______

Number of carbon atoms in a charcoal briquette:______