Skip to content

Course home

Question bank·3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
Sign up

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556
Question 17

The tables give information about two metal sulfates.

ElementMg\text{Mg}MgCa\text{Ca}CaS\text{S}SO\text{O}O
Relative atomic mass (ArA_rAr​)24403216
CompoundFormula
Magnesium sulfateMgSO4\text{MgSO}_4MgSO4​
Calcium sulfateCaSO4\text{CaSO}_4CaSO4​
a.

Calculate the percentage by mass of oxygen in magnesium sulfate and in calcium sulfate.

[4]
b.

Explain why the percentages calculated in part (a) are different.

[2]
Markscheme

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

95 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.

More questions