Quiz 1: Mole Concept

Which one is empirical?

• H₂O₂
• C₂H₆O₁₂
• CaCl₂
• N₂O₈

What is the molar mass of carbon?

• 12.0 g
• 12.0 mol
• 12.0 amu
• 12.0 g/mol

A mole of Neon contains
6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

Tags

NGSS.HS-PS1-7

Calculate the number of moles of 0.25 g of H₂SO₄?

• 2.00 x 10^-3 mol
• 2.35 x 10^-3 mol
• 2.55 x 10^-3 mol
• 3.00 x 10^-3 mol

How many hydrogen atoms in 0.5 g ammonia?

• 5.3144 x 10²² atoms
• 1.7715 x 10²² atoms
• 6.023 x 10²² atoms
• 3.543 10²² atoms

How many moles are there in 8.50 x 10²⁴ molecules of sodium sulfate, Na₂SO₄? (molecules to mole)

• 1.40 moles
• 14.1 moles
• 51.2 moles
• 5.12 x 10⁴⁸ moles

How many grams of NaCl (molar mass = 58.45g/mol) are present in 11.00 moles? (moles to grams)

• 0.4500 g
• 156.6 g
• 331.0 g
• 642.9 g

How many grams of Hydrogen are there in 25 moles of water?

• 25 g
• 450 g
• 18 g
• 50 g