Conversions (Mass-Mole-Particles) & Percent Comp.

Front

What is the molar mass of NaOH?

Back

39.997 g/mol

Front

What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g?

Back

K8S4O16

Front

How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3? (Round to hundredths place)

Back

1.26 moles

Front

What is the formula of a compound with the smallest whole-number mole ratio of the elements?

Back

Empirical formula

Front

How many molecules are in 2.5 mol of NaCl?

Back

1.51x10^24

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 difference between empirical formula and molecular formula?

Back

Empirical formula shows the simplest whole-number ratio of elements, while molecular formula shows the actual number of atoms of each element in a molecule.

Front

How do you convert grams to moles?

Back

Use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is Avogadro's number?

Back

6.022 x 10^23, the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How do you calculate the number of particles in a given number of moles?

Back

Multiply the number of moles by Avogadro's number.