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PIMSO 2025 - Science - Primary 4 - National Round Question 7

PIMSO Science · PIMSO 2025 - Science - Primary 4 - National Round

Question 7

A chemist is determining the density of an unknown liquid. She proceeds by taking the mass of a 10-mL graduated cylinder (24.75 g). Then, she proceeds to add 1mL portions of the liquid while recording the mass. The data is summarized on the table and graphed (best-fit line is also shown) below: From the given data, what is the best measurement of the density?
Question illustration
Editorial unit note: read the horizontal-axis unit consistently with the table and stated additions.
Source-table header transcription: V / mL = added liquid volume; m / g = total mass of cylinder plus liquid. The printed/rendered header cells appear black, so these exact source text-layer headings are supplied here for readability.
  1. 0.69 g/mL
  2. 0.70 g/mL
  3. 0.71 g/mL
  4. 0.72 g/mL