Original Promptbased on the uploaded ppt, please make a worksheet for grade 7 cambridge
This learning resource focuses on the concept of relative formula mass (Mr) and the percentage composition of elements in chemical compounds. Students will learn to calculate the Mr of different chemical substances using stoichiometric principles, beginning with the definition of relative atomic mass and formula mass. The resource includes retrieval practice exercises requiring calculations of Mr for various compounds, as well as a step-by-step guide for calculating percentage composition from atomic masses. Guided and independent practice problems enhance learning, encouraging students to apply their knowledge in real-world contexts. The document also presents an error analysis section to identify common mistakes in calculations and includes a challenge relating to societal health issues connected to sodium consumption.