To determine the metal, we need to compare its density with the given densities in the question. Density is calculated by dividing the mass of the sample by its volume.
Density = mass / volume
In this case, the density of the unknown metal can be calculated as follows:
Density = 428 grams / 20 cm^3
Density = 21.4 grams/cm^3
Comparing the calculated density (21.4 g/cm^3) with the given densities:
Cobalt: 8.9 g/cm^3
Silver: 10.5 g/cm^3
Lead: 11.3 g/cm^3
Platinum: 21.4 g/cm^3
Chromium: 7.2 g/cm^3
The calculated density matches the density of platinum (21.4 g/cm^3). Therefore, the metal is platinum.
The answer is D. Platinum.
Cobalt. 8.9
Silver. 10.5
Lead. 11.3
Platinum. 21.4
Chromium. 7.2
A sample of an unknown metal has a mass of 428 grams and a volume of 20cm^3. What is the metal?
A. Lead
B. Silver
C. Chromium
D. Platinum
1 answer
1 answer