Final answer:
The mass of 13 cm³ of copper would be 115.7 g.
Step-by-step explanation:
The density of copper is defined as the mass of a substance divided by its volume. In this case, we know that the volume of 100 cm³ of copper has a mass of 890g. So, we can calculate the density of copper by dividing the mass by the volume: density = mass / volume = 890g / 100cm³ = 8.9 g/cm³.
To find the mass of 13 cm³ of copper, we can use the density we just calculated. Since density = mass / volume, we can rearrange the equation to solve for mass: mass = density * volume. Plugging in the values, we get mass = 8.9 g/cm³ * 13 cm³ = 115.7 g.