Mole Concept Practice

Which of the following statements regarding the mole is incorrect?

• A mole is a counting unit equal to 6.02 x 1023 particles.

• The number of particles in a mole is known as Avogadro’s number.

• A mole of particles of an element is numerically equal to the atomic mass of the element.

• none of the above

How many molecules are in 2.00 moles of H₂O?

• 124x10²⁴ molecules of H₂O
• 1.20x10²³ molecules of H₂O
• 1.20x10²⁴ molecules H₂O
• 124

State the type of mass you will obtain from the substance H2O.

State the type of mass you will obtain from the substance Si.

Compute for the mass of H2O.

What name is given to the number of atoms in a mole of an element?

• Planck's constant

• Avogadro's constant

• Newtonian constant

How many moles are there in 9 g of water?

• 2

• 1

• 0.5

What is the definition for Avogadro's number?

• number of grams per one mole of a substance
• whole number ratio that is a multiple of a chemical formula
• simplest, whole number ratio of a chemical formula
• 6.02 x 10^23 particles per one mole of a substance

Which would have more atoms?

• 1 mole of Li
• 1 mole of Au
• 1 mole of Si
• None, all are equal

A mole can be represented by the (SELECT ALL CORRECT ANSWERS)

• 22.4 liters of a gas at STP

• The amount of molecules or atoms in a substance

• Molar mass found on the periodic table of elements

• The amount of fission or fusion decay over time