U5 Review IB Chem 1: Molar Relationships (w/ your review guide!)

What is the sum of all coefficients when the following equation is balanced using the smallest possible whole numbers? __ C₂H₂ + __ O₂ → __ CO₂ + __ H₂O

• 5

• 7

• 11

• 13

Which sample has the greatest mass?

• 1 mol of SO₂

• 2 mol of N₂O

• 2 mol of Ar

• 4 mol of NH₃

What mass (in g) of hydrogen is formed when 3 mol of aluminium react with excess hydrochloric acid according to the following equation? 2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g)

• 3.0

• 4.5

• 6.0

• 9.0

What is the total number of hydrogen atoms in 1.0 mol of benzamide, C₆H₅CONH₂?

• 7

What is the amount, in mol, of H₂O produced when 10.0 mol of C₂H₃Cl and 10.0 mol of O₂ are mixed together, and the above reaction goes to completion?

• 4.00

• 8.00

• 10.0

• 20.0

What is the approximate molar mass, in g mol−1, of MgSO₄•7H₂O?

• 120

• 130

• 138

• 246

Which is both an empirical and a molecular formula?

• C₅H₁₂

• C₅H₁₀

• C₄H₈

• C₄H₁₀

6.0 mol of aluminium reacts with oxygen to form aluminium oxide. What is the amount of oxygen, in mol, needed for complete reaction?

4Al(s) + 3O₂(g) --> 2Al₂O₃(s)

• 1.5

• 3.0

• 4.5

• 6.0

Tags

NGSS.HS-PS1-7

What is the total number of nitrogen atoms in two mol of NH₄NO₃?

• 4