Cambridge IGCSE Chemistry 0620 Syllabus: Key Points and Structure

A student is asked to determine the relative atomic mass (Ar) of chlorine using the following data: 75% of chlorine atoms have a mass of 35, and 25% have a mass of 37. What is the correct value for Ar(Cl)? Correct answer: 35.5

Which of the following best describes why it is important to use scientific notation and conventions when communicating experimental results? Correct answer: It ensures that results are universally understood and can be accurately interpreted by scientists worldwide.

A laboratory technician is tasked with separating a mixture of sand and salt. Which sequence of experimental techniques should be used to obtain pure salt from the mixture? Correct answer: Dissolve in water, filter, evaporate the filtrate