Mole Concept

What is the molar mass of carbon?

• 6.0 g/mol
• 12.0 g/mol
• 22.4 g/mol
• 6.02 x 10²³ g/mol

What is the molar mass of CO₂?

• 22.0 g/mol
• 28.0 g/mol
• 44.0 g/mol
• 56.0 g/mol

A mole of Neon contains
6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

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

• 0.0500 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5.00 moles

Tags

NGSS.HS-PS1-7

A mole of potassium chloride, an ionic compound, contains 6.02 x 10²³ _____.

• atoms

• formula units

• ions

• molecules

How many molecules are in 2.00 moles of H₂O?

• 124x10²⁴ molecules of H₂O

• 1.20x10²³ molecules of H₂O

• 12.04 x10²³ molecules H₂O

• 124

Tags

NGSS.HS-PS1-7

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg
• 9.03x10²⁴ atoms Hg
• 903 atoms of Hg
• 9.03 atoms of Hg

Tags

NGSS.HS-PS1-7

Two moles is equal to 12.04 x 10²³ atoms. But, what proper form will your calculator display it as?

• 1.204 x 10²⁴

• 1.204 x 10²²

• 12.04

• 0.1204 x 10²⁴

When entering scientific notation numbers on your calculator you don't type in "x10". Instead you enter ____ and then the exponent

• EE

• EXP

• Either EE or EXP depending on your brand of calculator

An Avogadro's number of water molecules is equal to all EXCEPT _________.

• 1 mole of water molecules

• 2 moles of Hydrogen atoms and 1 mole of oxygen atoms

• 18 grams of water

• 18 molecules of water