Chemical Quantities - Flashcard

Front

What is the empirical formula?

Back

A formula that shows the lowest whole number ratio of elements in a compound.

Front

How many moles of potassium (K) are in 25 g of K?

Back

0.64 mol

Front

What is the molar mass of C7H5N3O6?

Back

227.1 g/mol

Front

How many atoms of potassium (K) are in 0.5 moles of K2CrO4?

Back

6.022×10^23 atoms

Front

What is the mass of 1.55 moles of NCl3?

Back

187 g

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

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

Front

How do you calculate the number of atoms in a mole?

Back

Using Avogadro's number, which is 6.022×10^23 atoms/mole.

Front

What is a molecular formula?

Back

A formula that shows the actual number of atoms of each element in a molecule.

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.