Which of the following represents Avogadro's number?

• 6.022 × 10²²

• 6.022 × 10²³

• 6.022 × 10²⁴

• 6.022 × 10²⁵

What is the mass of 1 mole of sulfur (S)?

• 32 grams

• 64 grams

• 96 grams

• 256 grams

What is the definition of a mole in chemistry?

• The amount of a substance that contains 6.02 × 10²³ particles

• The mass of a substance in grams

• The volume of a substance in liters

• The temperature of a substance in Kelvin

What is the mass of 2 moles of nitrogen gas (N2)?

(Atomic mass of N=14)

• 14 grams

• 28 grams

• 56 grams

• 112 grams

How many atoms are there in 1 mole of calcium (Ca)?

• 6.022 × 10²² atoms

• 6.022 × 10²³ atoms

• 1.806 × 10²⁴ atoms

• 1.806 × 10²³ atoms

How many atoms are present in 1 mole of carbon (C)?

• 6.022 × 10²² atoms

• 6.022 × 10²³ atoms

• 6.022 × 10²⁴ atoms

• 6.022 × 10²⁵ atoms

What is the mass of 0.5 moles of oxygen gas (O₂)?

(Atomic mass: O=16)

• 8 grams

• 16 grams

• 24 grams

• 32 grams

How many grams are there in 2 moles of potassium permanganate (KMnO₄)?

(Atomic Masses: K=39, Mn=55, O=16)

• 158 grams

• 316 grams

• 361 grams

• 158.04 grams

How many moles are there in 2.0 grams of hydrogen gas (H₂)?

(Atomic mass of H=1)

• 0.5 moles

• 1 mole

• 2 moles

• 4 moles

What is the molar mass of water (H₂O)?

(Atomic mass: H=1, O=16)

• 16 g/mol

• 18 g/mol

• 20 g/mol

• 22 g/mol