EASY
Upper Secondary: IGCSE
IMPORTANT
Earn 100

56 g of iron combine with 32 g of sulfur to form iron sulphate. Find the empirical formula for iron sulphate. Ar: Fe=56, S=32

Important Questions on Using Moles

HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 4
An oxide of sulphur is 40 % sulphur and 60 % oxygen. What is its empirical formula?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 1
In the ionic compound magnesium chloride, magnesium and chlorine atoms combine in the ratio 1:2. What is the formula of magnesium chloride?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 2
In the ionic compound aluminium fluoride, aluminium and fluorine atoms combine in the ratio 1:3. What is the formula of aluminium fluoride?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 3
What is the difference between an empirical formula and a molecular formula? Can they ever be the same?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 4
What is the empirical formula for benzene C6H6?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 5
A compound has the empirical formula CH2. Its Mr is 28. What is its molecular formula?
HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 6
A hydrocarbon is 84 % carbon, by mass. Its relative molecular mass is 100. Find its empirical formula and molecular formula.
HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 6 - Using Moles>Q>Q 7
An oxide of phosphorus has an Mr value of 220. It is 56.4 % phosphorus. Find its molecular formula.