Inv 8 Flashcardizz

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, identify the number of each type of atom in the compound, multiply by the atomic mass of each element, and sum the total.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10²³, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How do you convert moles to mass?

Back

To convert moles to mass, multiply the number of moles by the molar mass of the substance.

Front

How do you convert mass to moles?

Back

To convert mass to moles, divide the mass of the substance by its molar mass.

Front

What is the formula to find the number of atoms in a sample?

Back

Number of atoms = (mass of sample in grams / molar mass) x Avogadro's number.

Front

What is the molar mass of Cu(NO₃)₂?

Back

The molar mass of Cu(NO₃)₂ is 187.57 g/mol.

Front

How many moles are in 700 grams of Fe₃(PO₄)₂?

Back

There are 1.96 moles of Fe₃(PO₄)₂ in 700 grams.

Front

What is the mass of a sample of CaBr₂ with 8.33 x 10²³ atoms?

Back

The mass of the sample is 276.6 g CaBr₂.

Front

How many atoms are in 25 grams of sulfur?

Back

There are 4.69 x 10²³ atoms of sulfur in 25 grams.