TEST MOD : MOLAR MASS,EMPIRICAL FORMULA, & PERCENT COMPOSITION

The number 6.02 x 10²³, which is the number of particles found in a mole.

• molar mass

• mole

• Avogadro's number

What is the molar mass of copper?

• 12 g/mol

• 63.5 g/mol

• 58.9 g/mol

The best definition for a mole provided below is

• The SI unit for the mass of something

• The SI unit for the amount of a substance

• The SI unit for the volume of something

What is the molar mass of table salt (NaCl)?

• 58.4 g/mol

• 35.5 g/mol

• 23 g/mol

What is the molar mass of fluorine gas?

• 19 g/mol

• 38 g/mol

• 9 g/mol

What is the molar mass of B₂(CO₃)₃?

• 81.6 g/mol

• 201.6 g/mol

• 38.8 g/mol

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles

• 1.81 x 10⁴⁶ moles

• 5.00 x 10²¹ moles

The mass in grams of one mole of any pure substance.

• molecular formula

• molar mass

• mole

The percent by mass of each element in a compound.

• empirical formula

• mole

• percent composition

A formula that shows the smallest whole-number ratio of the elements of a compound.

• molecular formula

• molar mass

• empirical formula