Chem Spring BM Prep

What is the gram formula mass of H2O2, in grams per mole?

• 34.02

• 30.02

• 36.02

• 32.02

Which substance has the greatest molecular mass?

• CF4

• NO

• I2

• H2O2

What is the formula mass of potassium chloride, KCl?

• 32.3 amu

• 74.6 amu

• 149.2 amu

• 154.5 amu

The gram atomic mass of oxygen is 16.0 grams per mole. How many atoms of oxygen does this mass represent?

• 16.0

• 32.0

• 6.02 x 10^23

• 0.50 mole of HCl

• 0.75 mole of H2O

• 1.5 moles of Cu

• 1.5 moles of H2

What is the total number of molecules of SO2 in a 0.10-mole sample of SO2?

• 6.0 x 10^22

• 6.0 x 10^24

The percent composition by mass of nitrogen in NH4OH (gram formula mass = 35 grams/mole) is equal to which of the following?

• (35/4) x 100

• (4/35) x 100

• (35/14) x 100

• (14/35) x 100

The percent by mass of hydrogen in NH₃ is equal to which of the following?

Which compound contains the greatest percentage of chlorine by mass?

• NaCl

• FeCl₂

• ZnCl₂

• HCl

Which pair consists of a molecular formula and its corresponding empirical formula?

• SO₂ and SO₃

• C₂H₂ and CH₃CH₃

• C₆H₆ and C₂H₂

• P₄O₁₀ and P₂O₅