A student writes three statements about atom economy.
Statement 1: a reaction with an atom economy of 100% must also have a percentage yield of 100%
Statement 2: the atom economy of a reaction can be calculated from its balanced equation alone
Statement 3: using a catalyst increases the atom economy, because more product forms in a given time
Which statements are correct?
2 only
1 and 2 only
2 and 3 only
1, 2 and 3
157 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.