FINAL EXAM REVIEW 2025

An element's molar mass can be found on what part of an element's entry on the periodic table?

• atomic number

• atomic mass

• group number

• it can't be found on the periodic table

How many grams of carbon dioxide are in 0.5 mol of carbon dioxide?

• 11 g

• 44.009 g

• 22.005 g

• 88.018 g

How many moles of Uranium (U) are in 1.204 x 10²⁴ atoms?

• 1.23 moles

• 44.56 x 10⁴⁹ moles

• 87 moles

• 2 moles

What percent of aluminum oxide(Al₂O₃) is oxygen? Assume oxygen has a molar mass of 16 g/mol and aluminum has a molar mass of 27 g/mol

• 37%

• 47%

• 16%

• 60%

How many moles are in 4.5x10²⁴ particles?

• 0.747 particles

• 7.48 mol

• 2.71x10⁴⁷ mol

• 2.71x10⁴⁷ particles

What is the mass of one mole of Al₂(SO₄)₃?

• 75.04 g
• 342.14 g 
• 75.04 mol
• 342.14 mol

How many molecules are there in 12 g of carbon-12l?

• 3.5x10²⁴molecules
• 9.79x10^-24molecules
• 6.02x10²³molecules

• 6.023 X10 24

If I need 20.4 moles of Glucose, C6H12O6, how much should I weigh out?

• 0.549 g
• 112 g
• 1192 g
• 3672 g

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.

• SO
• SO2
• SO3
• SO4

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

• CH₂O
• C₂H₄O₂
• C₄H₈O₄
• C₆H₁₂O₆