Mole Concepts

Front

What is the molar mass of NaCl?

Back

58.45 g/mol

Front

What is the percent by mass of magnesium in MgO?

Back

60%

Front

Which has more molecules or formula units? 1 mole H2O, 1 mole Al(OH)3, 1 mole NaCl, or all the same?

Back

There are all the same

Front

What is the molar mass of one molecule of Nitrogen N2?

Back

28.02 g

Front

What is the molar mass of CaCl2? Is it Formula mass or Molecular mass?

Back

Formula mass, because CaCl2 is Ionic

Front

Define molar mass.

Back

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

Front

What is Avogadro's number?

Back

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

Front

How do you calculate percent by mass?

Back

(mass of component / total mass) x 100%.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons, while covalent compounds are formed by the sharing of electrons.

Front

What is a mole in chemistry?

Back

A mole is a unit that measures the amount of substance, equivalent to Avogadro's number of particles.