Final answer:
To find the density of a cube of butter, convert the weight from pounds to grams, then divide by the volume in milliliters. Check your learning using a similar process for a different liquid. Express the final density using the same number of significant figures as the least precise measurement.
Step-by-step explanation:
To determine the density of the cube of butter, you can use the density formula, which is the mass of an object divided by its volume. First, convert the weight of the butter from pounds to grams (since density is typically expressed in g/mL), knowing that 1 lb equals 453.592 g. Thus, 0.230 lb is equal to 0.230 × 453.592 g, which equals approximately 104.326 g.
Next, you divide this mass by the volume of the butter to find its density. Since the volume is already in milliliters (mL), you can use it directly in the calculation. The density is then calculated as 104.326 g / 135.3 mL, which gives you the density of the butter in g/mL.
Using the same process, you can check your learning by calculating the density of a liquid that has a mass of 31.1415 g and a volume of 30.13 cm³. Here, the density would be 31.1415 g / 30.13 cm³, resulting in a density value that will be expressed in g/cm³. Remember when calculating density to express your final answer with the same number of significant figures as the least precise measurement used in the calculation.