Moles practice!

Front

What is an empirical formula?

Back

The simplest whole-number ratio of moles of elements in the compound.

Front

Calculate the percentage composition of Mg in Mg₃(PO₄)₂.

Back

27.75% Mg

Front

What is the chemical formula for ammonium?

Back

NH₄¹⁺

Front

What is the number 6.02 x 10²³ known as?

Back

Avogadro's number.

Front

What is the empirical formula for C₃H₈?

Back

C₃H₈.

Front

Define molar mass.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

What is the relationship between moles and mass?

Back

Moles = mass (g) / molar mass (g/mol).

Front

How do you convert moles to molecules?

Back

Molecules = moles × Avogadro's number (6.02 x 10²³).

Front

What is the formula to find the number of moles from a given number of molecules?

Back

Moles = molecules / Avogadro's number.

Front

What is the significance of Avogadro's number in chemistry?

Back

It represents the number of particles (atoms, molecules) in one mole of a substance.