Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: La fórmula del sulfuro de sodio es Na{4; 1; 2; 3}S{4; 2; 3; 1}
Right answer summary: part 1: 2; part 2: 1
Question state: todo
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: La fórmula del sulfuro de sodio es Na{4; 1; 2; 3}S{4; 2; 3; 1}
Right answer summary: part 1: 2; part 2: 1
Question state: todo