Quantitaive Chemistry I

What is the mass of one mole of iodine molecules?

• 254g

• 74g

• 106g

• 127g

Number of moles of Al₂O₃ in 40g.

• 40%
• 0.39
• 4080
• 2.55

Mass of one mole of Mg(OH)₂

• 58g
• 42g
• 82g
• 41g

Which represents the greatest mass of sulfur?

• 1 gram of sulfur
• 1 molecule of sulfur
• 0.5 mole of sulfur
• 6.02 x 10²³ atoms of sulfur

Calculate the % composition by mass of oxygen present in H₂SO₄.

• 16.3%
• 65.25%
• 32.6%
• 57.14%

What is the relative formula mass of CO₂?

• 44
• 32
• 16
• 56

What is the formula for iron(III) oxide?

• FeO
• Fe₃O
• Fe₃O₂
• Fe₂O₃

Calculate the molar mass of Hydrochloric Acid - HCl

• 36.5
• 35.5
• 35
• 37

What is the empirical formula of a compound if the molecular formula is W₁₈O₉?

• W₁₈O₉
• W₂O
• W₆O₃
• none of the above

Calculate the number of moles of atoms in 6g of Magnesium

• 6.00 moles
• 24.00 moles
• 0.50 moles
• 0.25 moles