HARD
Upper Secondary: IGCSE
IMPORTANT
Earn 100

A 5 g sample of impure magnesium carbonate is reacted with an excess of hydrochloric acid:

MgCO3 (s)+2HCl (aq)MgCI2 (aq) + H2O (l) + CO2 (g)

1250 cm3 of carbon dioxide is collected at rtp. Calculate the % purity of the 5 g sample. Ar: C=12, O=16, Mg=24

Important Questions on Using Moles

EASY
Upper Secondary: IGCSE
IMPORTANT
How many atoms are in 1 mole of the atoms?
EASY
Upper Secondary: IGCSE
IMPORTANT
How many molecules are in 1 mole of molecules?
EASY
Upper Secondary: IGCSE
IMPORTANT
What name is given to the number 6.02 × 1023?
EASY
Upper Secondary: IGCSE
IMPORTANT
Find the mass of 1 mole of hydrogen atoms.
EASY
Upper Secondary: IGCSE
IMPORTANT
Find the mass of 1 mole of iodine atoms.
EASY
Upper Secondary: IGCSE
IMPORTANT
Find the mass of 1 mole of chlorine atoms.
EASY
Upper Secondary: IGCSE
IMPORTANT
Find the mass of 1 mole of chlorine molecules.
EASY
Upper Secondary: IGCSE
IMPORTANT
Find the mass of 2 moles of oxygen atoms.