Neco 2024 Chemistry Question 4

Practice essay / theory question 4 from the 2024 Neco Chemistry examination. This question covers Mole concept, Empirical and molecular formula, Stoichiometry, Gas volume at STP .

Neco 2024 Chemistry Essay / Theory
Topics: Mole concept Empirical and molecular formula Stoichiometry Gas volume at STP
Question 4 NECO • 2024 • CHEMISTRY • essay

The diagram shows the structural formula of a hypothetical organic compound X which contains only carbon (C), hydrogen (H) and oxygen (O). The molecular mass of X is given as 180 g·mol\^{-1}. Using the information from the diagram, answer the following questions.

Question Parts

( a )
Write the empirical formula of compound X based on the structural diagram.
( b )
Using the given molecular mass, determine the molecular formula of X and show that it agrees with the structure.
( c )
If 2.50 g of X is completely combusted, calculate the volume (in litres) of CO\(_2\) produced at STP (22.4 L·mol\^{-1}).
( d )
Compound X reacts according to the equation: C10H12O3 + 2 NaOH → products. If 0.025 mol of X is used and the reaction yield is 85 %, calculate the mass of NaOH that must be taken.

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About This Question

This is Neco 2024 Chemistry Question 4. It is one of the essay questions from the 2024 Neco Chemistry examination.

The question covers Mole concept, Empirical and molecular formula, Stoichiometry, Gas volume at STP .

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