Final answer:
The mass of a 10 cm³ sample of oil with a density of 0.8 g/cm³ is 8 g when calculated with one significant figure.
Step-by-step explanation:
If the density of a certain oil is 0.8 g/cm³, what is the mass of a 10 cm³ sample of this oil? To find the mass, we multiply the density by the volume. The density given is 0.8 g/cm³, and the volume of the sample is 10 cm³. The calculation is as follows:
Mass = Density × Volume = 0.8 g/cm³ × 10 cm³ = 8 g
Since we want to report the answer with one significant figure, the mass of the oil is 8 g. Therefore, the correct answer is option b. 8 g.