Neco 2019 Chemistry Question 4

Practice essay / theory question 4 from the 2019 Neco Chemistry examination. This question covers mole concept, stoichiometry, empirical formula, percent composition .

Neco 2019 Chemistry Essay / Theory

Topics: mole concept stoichiometry empirical formula percent composition

Question 4 NECO • 2019 • CHEMISTRY • essay

The diagram shows the structural formula of a colourless liquid organic compound commonly used as a solvent in laboratories.

Question Parts

( a )

Write the molecular formula of the compound shown in the diagram.

( b )

A 5.00 g sample of the compound is completely combusted in excess oxygen. Write the balanced combustion equation and calculate the mass of carbon dioxide produced.

( c )

From the same 5.00 g sample, calculate:

( ) Number of moles of the compound present in the sample.

( ) Mass of carbon contained in the sample.

( ) Percent by mass of hydrogen in the compound.

( d )

In a saponification reaction, 0.250 mol of the compound reacts with excess NaOH to give ethanol and sodium acetate. Calculate the mass of sodium acetate formed.

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About This Question

This is Neco 2019 Chemistry Question 4. It is one of the essay questions from the 2019 Neco Chemistry examination.

The question covers mole concept, stoichiometry, empirical formula, percent composition .

View More Neco 2019 Chemistry Questions More Neco Practice Questions Back to Questions

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