Practise MYP Chemistry questions on 5.4 the Mole Concept and Chemical Calculations and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
Which of the following describes the importance of mole-based calculations in 'Green Chemistry'?
Which of the following is a common reason why the actual yield of a chemical reaction is often lower than the theoretical yield?
A gas sample with a mass of occupies a volume of at STP. What is the molar mass () of the gas? (Assume at STP)
In a chemical reaction, the __________ reactant is the substance that is completely used up first, thereby stopping the reaction and determining the maximum amount of product formed.
Why is it clinically important for pharmacists to consider the molar mass of a drug's active ingredient rather than just its total mass?
They eliminate the need for measuring the actual yield of a process.
They ensure that the most expensive reactant is always used in excess.
They allow chemists to ignore the rate of reaction in industrial settings.
They help design reactions that minimize toxic by-products and waste by using correct reactant ratios.
The conservation of mass during the process
The presence of side reactions forming different products
The use of a catalyst in the reaction
The reaction reaching completion too quickly
excess
catalyst
theoretical
limiting
To determine the number of active molecules delivered in a dose
To lower the manufacturing cost of the packaging
To ensure the tablet has the correct physical color
To calculate the shelf life of the medicine
