1 Step Mole Conversion Practice

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, ions, etc.) as there are in 12 grams of carbon-12.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of NaOH?

Back

The molar mass of NaOH (Sodium Hydroxide) is approximately 40 g/mol.

Front

What is STP in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere (atm) of pressure.

Front

How many liters does one mole of gas occupy at STP?

Back

One mole of an ideal gas occupies 22.4 liters at STP.

Front

What is Avogadro's number?

Back

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

Front

How do you calculate the number of molecules from moles?

Back

To calculate the number of molecules from moles, use the formula: Number of molecules = Moles x Avogadro's number.

Front

What is the relationship between moles and formula units in ionic compounds?

Back

In ionic compounds, the term 'formula unit' refers to the simplest ratio of ions in the compound, and one mole of a compound contains Avogadro's number of formula units.

Front

How many moles are in 6.02 x 10^25 formula units of CaO?

Back

To find the number of moles, divide the number of formula units by Avogadro's number: Moles = (6.02 x 10^25) / (6.02 x 10^23) = 100 moles.

Front

What is the formula to find moles from volume at STP?

Back

To find moles from volume at STP, use the formula: Moles = Volume (L) / 22.4 L/mol.