Front

What is the number of particles in a mole?

Back

6.02 x 10^23

Front

What type of bond do atoms of hydrogen (H) only form?

Back

Single bonds

Front

How many moles are in 16.94g of water (H2O)?

Back

0.9401 mol H2O

Front

Calculate the number of moles in 20.9 grams of nitrogen (N2).

Back

0.746 moles

Front

Which of the following reactions is balanced? 2Na + 2H2O -> 2NaOH + H2

Back

2Na + 2H2O -> 2NaOH + H2

Front

What is the molar mass of water (H2O)?

Back

18.02 g/mol

Front

Define a mole in chemistry.

Back

A mole is a unit that measures the amount of substance, defined as exactly 6.022 x 10^23 particles.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.022 x 10^23) is used to convert between moles and number of particles.

Front

What is the formula to calculate moles from mass?

Back

Moles = Mass (g) / Molar Mass (g/mol)

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation.