2nd 9 Weeks Make Up Assignment

Front

To convert from particles to moles, you should multiply by what?

Back

Avogadro's number (6.02 x 10^23) to find the number of moles.

Front

To convert from moles to particles, you should multiply by what?

Back

Avogadro's number (6.02 x 10^23) to find the number of particles.

Front

How many moles are in 2.85 x 10^18 atoms of iron?

Back

4.73 x 10^-6 moles.

Front

To convert from moles to grams, you should multiply by what?

Back

The molar mass of the substance (in g/mol) to find the mass in grams.

Front

0.75 mole of copper (Cu) is equal to how many atoms?

Back

4.51 x 10^23 atoms.

Front

What is Avogadro's number?

Back

6.02 x 10^23, the number of particles in one mole of a substance.

Front

Define a mole in chemistry.

Back

A mole is a unit that measures the amount of a substance, defined as containing exactly 6.02 x 10^23 particles.

Front

What is the molar mass of an element?

Back

The mass of one mole of that element, usually expressed in grams per mole (g/mol).

Front

How do you calculate the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the relationship between moles and volume for gases at STP?

Back

At standard temperature and pressure (STP), 1 mole of gas occupies 22.4 liters.