EASY
Upper Secondary: IGCSE
IMPORTANT
Earn 100

27 g of aluminium burns in chlorine to form 133.5 g of aluminium chloride. Ar: Al=27, Cl=35.5

How many moles of aluminium atoms are present in 27 g of aluminium?

Important Questions on Using Moles

EASY
Upper Secondary: IGCSE
IMPORTANT
27 g of aluminium burns in chlorine to form 133.5 g of aluminium chloride. Ar: Al=27, Cl=35.5

Find the simplest formula of aluminium chloride.

EASY
Upper Secondary: IGCSE
IMPORTANT
27 g of aluminium burns in chlorine to form 133.5 g of aluminium chloride. Ar: Al=27, Cl=35.5

1 dm3 of an aqueous solution is made using 13.35 g of aluminium chloride. What is its concentration in moles per dm3?

MEDIUM
Upper Secondary: IGCSE
IMPORTANT

You have to prepare some 2 M solutions, with 10 g of solute. What volume of solution will you prepare, for the following solute? Ar: H=1, Li=7, N=14, O=16, Mg=24, S=32

  • Lithium sulfate Li2SO4
MEDIUM
Upper Secondary: IGCSE
IMPORTANT

You have to prepare some 2 M solutions, with 10 g of solute. What volume of solution will you prepare, for the following solute? Ar: H=1, Li=7, N=14, O=16, Mg=24, S=32

  • Magnesium sulfate MgSO4
MEDIUM
Upper Secondary: IGCSE
IMPORTANT

You have to prepare some 2 M solutions, with 10 g of solute. What volume of solution will you prepare, for the following solute? Ar: H=1, Li=7, N=14, O=16, Mg=24, S=32

  • Ammonium nitrate NH4NO3
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Phosphorus forms two oxides, which have the empirical formulae P2O3 and P2O5. Which oxide contains the higher percentage of phosphorus? Ar: P=31, O= 16
HARD
Upper Secondary: IGCSE
IMPORTANT
Phosphorus forms two oxides, which have the empirical formulae P2O3 and P2O5. What mass of phosphorus will combine with 1 mole of oxygen molecules (O2) to form P2O3? Ar: P=31, O= 16
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Phosphorus forms two oxides, which have the empirical formulae P2O3 and P2O5. What is the molecular formula of the oxide that has a formula mass of 284? Ar: P=31, O= 16