N level Sci Chem - Mole Concept

Hi again!

This post will guide you through the TYS Questions on Mole Concepts. Again, I am using Shing Lee Education Ten-Years Series 2010-2019 in these videos.

This chapter is usually not a popular topic among students 😅 but with practice, you will definitely be able to conquer this chapter.

A quick summary of this chapter testing focus:

  1. Formula of substances such as hematite, ammonia, magnesium chloride, hydrogen chloride, sulfuric acid, nitric acid, sodium hydroxide
  2. Writing / Balancing chemical equations
  3. This formula: Mass = mole x MR or no. of mole = mass / MR
  4. These 3 steps to complete a typical mole concept question:
  • Identify the no. of mole of substance provided 
  • Compare the mole ratio between the substance you have versus what you need to identify 
  • Identify the mass of substance produced / reacted based on the needs of the question 
The links to the videos are here: 


Most importantly, I would like to encourage you to persevere in your practice and to never allow this chapter to instill fear in you.

"Skills come from consistent and deliberate practice." - Shawn Allen  

Till next time!

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