Mole Concept Review

How many particles are in a mole?

• 6.022 x 10²³

• 6.626 x 10³⁴

• 8.854 x 10^-12

Tags

NGSS.HS-PS1-7

What is the correct unit for mass?

• gram

• liter

• mole

• meter

What is the correct unit for molar mass?

• gram

• g/mol

• liter

• mole

Tags

NGSS.HS-PS1-7

What is the molecular formula (MF) of a compound with a molar mass of 150 g/mol if the empirical formula (EF) is CH₂O?

• C₅H₁₀O₅

• CH₁₀O₅

• C₅H₂O₅

• C₅H₁₀O

What is the molar mass of NaCl?

• 58.44 g/mol

• 93.89 g/mol

• 81.43 g/mol

• 35 g/mol

What is the percentage composition of hydrogen in sulfuric acid (H₂SO₄) ?

Molar mass of H₂SO₄ = 98 g/mol.

• 2.04%

• 6.12%

• 1.02%

• 16.3%

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

What is the mass (g) of 2.5 moles of water (H₂O)?

Molar mass of H₂O = 18 g/mol

• 45 g

• 7.2 g

• 0.16 g

• 5 g

Tags

NGSS.HS-PS1-7

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

What is the molar mass of PbSO₄?

• 303.27 g/mol

• 255.27 g/mol

• 163.87 g/mol

• 372.27 g/mol