Introduction to Moles Check Point

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles in one mole of a substance.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (in g/mol).

Front

What is the molar mass of aluminum (Al)?

Back

The molar mass of aluminum is 27 g/mol.

Front

If you have 2 moles of a substance, how many particles do you have?

Back

You have 2 x 6.02 x 10^23 particles, which equals 1.204 x 10^24 particles.

Front

What is the relationship between moles and mass?

Back

The mass of a substance in grams is equal to the number of moles multiplied by the molar mass of the substance.

Front

How many moles are in 54 grams of aluminum?

Back

There are 2 moles of aluminum in 54 grams (54 g / 27 g/mol = 2 moles).

Front

What is the speed of a bicycle in km/h if it travels at 6.00 m/s?

Back

The speed is 21.6 km/h (6.00 m/s x 3.6 = 21.6 km/h).

Front

What is the formula to convert speed from m/s to km/h?

Back

To convert speed from m/s to km/h, multiply by 3.6.

Front

What is the mass of one mole of carbon (C)?

Back

The mass of one mole of carbon is 12 g.