A firefighter uniform made from polymer J has a mass of 6.0 kg. Calculate the mass of a uniform of the same size made from polymer K.
Use Table 1 and the equation:
mass of uniform made from polymer K = (density of polymer K / density of polymer J) × 6.0

The question provides the equation to use. First, we need the densities from Table 1: - Density of polymer K = 1.4 g/cm³ - Density of polymer J = 0.9 g/cm³ - Mass of uniform from polymer J = 6.0 kg Now, substitute these values into the equation: mass of uniform made from polymer K = (density of polymer K / density of polymer J) × 6.0 mass of uniform made from polymer K = (1.4 / 0.9) × 6.0 mass of uniform made from polymer K = 1.555... × 6.0 mass of uniform made from polymer K = 9.333... kg Rounding to two significant figures gives 9.3 kg.