Final Exam Review: Chemical Quantities

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules

How many atoms of carbon are in 6.00g of carbon?

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

Tags

NGSS.HS-PS1-7

How many grams are in 1.2 x 10²⁴ molecules of CO?

• 28 grams
• 56 grams
• 6.02 grams
• 1.2 grams

Tags

NGSS.HS-PS1-7

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

• 0.05 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5 moles

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

What is the mass of 0.89 mol of CaCl₂?

• 111 grams
• 0.008 grams
• 98.9 grams
• none of the choices

Tags

NGSS.HS-PS1-7

The number 6.02 x 10²³, which is the number of particles found in a mole, is called

• molar mass

• mole

• Avogadro's number

• hydrate

What is the molar mass of B₂(CO₃)₃?

• 82 g/mol

• 95 g/mol

• 39 g/mol

• 202 g/mol

What is the mass in grams of 6.250 mol of Cu(NO₃)₂?

• 126 g

• 785 g

• 625 g

• 1172 g

What is the percent by mass of oxygen in MgO?

• 20%
• 40%
• 50%
• 60%