"THE MOLE" Test Review

What is a mole (in Chemistry)?

• A mole is a measure of temperature in chemistry.
• A mole is a unit of mass equivalent to 1 gram.
• A mole is a type of chemical reaction.
• A mole is a unit that represents 6.022 x 10^23 particles in chemistry.

What is the molar mass of MgBr₂?

• 150.00 g/mol
• 175.50 g/mol
• 184.11 g/mol
• 200.25 g/mol

How many moles are in 42g of Li₂O?

• 3.00 moles
• 2.83 moles
• 0.5 moles
• 1.41 moles

How many moles of carbon are equal to 6.3×10²⁵ atoms?

• 10.46 moles
• 8.9 moles
• 12.3 moles
• 5.2 moles

What is the empirical formula for C₆H₁₀N₂O₄?

• C₆H₁₀O₂

• C₂H₄N₂O₄

• C₄H₈N₂O₃

• C₃H₅NO₂

What is the percent composition of Rubidium in Rubidium Sulfide (Rb₂S)?

• 60.3%
• 90.5%
• 84.2%
• 75.0%

The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of ¹²C.

• mole
• molar volume
• Avogadro's number
• Law of Conservation of Mass

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

How many molecules are in 2.00 moles of H₂O?

• 124x10²⁴ molecules of H₂O
• 1.20x10²³ molecules of H₂O
• 1.20x10²⁴ molecules H₂O
• 124

Tags

NGSS.HS-PS1-7

Convert 25 g of NaBr to molecules

• 102.96 molecules

• 0.24 molecules

• 1.45x10²³ molecules

• 2.34 x 10²⁰molecules

Tags

NGSS.HS-PS1-7