IGCSE Chemistry: Quantitative Chemistry T1

What is the relative formula mass of CO₂?

• 44
• 32
• 16
• 56

What is the unit for molar mass?

• no unit
• g
• g mol^-1

Tags

NGSS.HS-PS1-7

What is the formula for iron(III) oxide?

• FeO
• Fe₃O
• Fe₃O₂
• Fe₂O₃

Calculate the mass of oxygen present in a 55g sample of Aluminum oxide, Al₂O₃.

• 29.28
• 19.95
• 11.36
• 32.33

Tags

NGSS.HS-PS1-7

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

• 16.3%
• 65.25%
• 32.6%
• 57.14%

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

• W₁₈O₉
• W₂O
• W₆O₃
• none of the above

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

What is the molar mass of CO₂?

• 12
• 16
• 32
• 44

What is the mass percentage of Carbon in carbon dioxide (CO₂)?

• 27.3%
• 42.9%
• 57.1%
• 72.7%

Formula mass of KBr

• 119
• 117g
• 54
• 62g