Final answer:
To find the mass of a 125 cm3 cylinder of zinc, multiply the volume by the density (7.13 g/cm3) to get 891.25 g, then convert to kilograms to get 0.891 kg. The correct answer is 0.891 kg.
Step-by-step explanation:
The question asks for the mass in kilograms of a 125 cm3 cylinder of zinc, given the density of zinc is 7.13 g/cm3. To calculate the mass, we use the formula density = mass/volume. Rearranging this formula gives us mass = density × volume. By plugging in the values we have:
mass = 7.13 g/cm3 × 125 cm3
mass = 891.25 g
Since the question requires the mass in kilograms, we convert grams to kilograms by dividing by 1000:
mass = 891.25 g ÷ 1000 = 0.891 kg
Therefore, the correct answer is d. 0.891 kg. This result makes sense considering the density of zinc and the volume of the cylinder provided. Metals typically have densities higher than water, and 0.891 kg for a 125 cm3 cylinder of zinc aligns with expected values for metallic densities.