Mole & Conversions Flashcard PREVIEW

Front

How many moles are in 321.8 g of sodium chloride (NaCl)?

Back

5.507 moles

Front

Calculate the molar mass of Ba(C2H3O2)2.

Back

255.3 g/mol

Front

What is the chemical formula for calcium phosphate?

Back

Ca3(PO4)2

Front

What is the chemical formula for magnesium carbonate?

Back

MgCO3

Front

What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of bromine?

Back

87%

Front

Define a mole in chemistry.

Back

A mole is a unit of measurement for amount of substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

What is the formula to calculate molar mass?

Back

Molar mass = sum of the atomic masses of all atoms in the formula.

Front

How do you convert grams to moles?

Back

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

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.022 x 10^23) allows chemists to count particles by weighing them.

Front

What is the molar mass of sodium chloride (NaCl)?

Back

58.44 g/mol.