Moles and Percent Composition Review

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

Tags

NGSS.HS-PS1-7

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

What is Avogadro's Number? 

• 6.02 x 10²³
• - 6.02 10²³
• 6.02 x 10²²
• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

How are the mole and atomic masses of elements related?  

• The atomic mass of any substance is always equal to 1 mole of that substance 
• The atomic mass added up with itself by 6.02 x 10²³ equals the amount of atoms
• The atomic mass is the amount of protons plus number of atoms
• Atoms combined make up molecules, which are the measurement of atomic masses 

Which has the greatest number of balls:  One mole of soccer balls or one mole of tennis balls?

• One mole of soccer balls
• one mole of tennis balls
• They both have the same number of balls
• There is not enough information to solve.

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

What is the molar mass C₆H₁₂O₆

• 61.0g/mol
• 95.7g/mol
• 180.2 g/mol
• 164.9g/mol

What is the molar mass of (NH₄)₂CO₃

• 96.1 g/mol
• 218.0g/mol
• 87.3g/mol
• 72.9g/mol

What percent is in color?

• 620%
• 1/2
• 60%
• 62%

What percent is in color?

• 3%
• 30%
• 33%
• 300%