Test Index

JAMB Chemistry 2023 Paper

Question : 68

Total: 82

Solution:

Concept:

Mass is found by multiplying volume by density:

\text{Mass} = \text{Volume} \times \text{Density}

Explanation:

The volume of ethanol is

500\ \text{mL}

The density of ethanol is

0.789\ \text{g/mL}

Substitute these values into the formula:

\text{Mass} = 500\ \text{mL} \times 0.789\ \text{g/mL}

The

\text{mL}

units cancel out, leaving mass in grams:

\text{Mass} = 500 \times 0.789\ \text{g} = 394.5\ \text{g}

So the mass of the ethanol sample is

394.5

grams.

Answer:

394.5\ \text{g}

— Option C.

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