An unknown metal has a volume of 20cm^3 and a mass of 54g. What is the likely identity of the unknown metal?
could i please have some help with this? ur help is appreciated. :D
mass = density x volume
You know volume and mass, calculate density. Then look up in a table and this probably is a common metal such as lead, gold, copper, iron, aluminum, etc. Your text probably has such a table or I can find one on the web.
if i already know the volume and mass, wouldnt i be calculating the density?because u put mass = density x volume
Yes, you would be calculating the density. Since mass = volume x density, that can be rearranged to
density - mass/volume. Just plug in the mass and the volume to determine density, then use tables to identify the metal.
oh, sorry :P
so d = m x v
d = 20cm^3 x 54 g
d = 1080 ?
what would be the unit of measure for this?:S
No. Density = mass/volume. The unit you have calculated is g*cc but if you substitute correctly the units will be g/cc.
To determine the likely identity of the unknown metal, you need to compare its density to the densities of known metals. Density is defined as mass divided by volume.
1. Start by calculating the density of the unknown metal by dividing its mass (54g) by its volume (20 cm^3):
Density = Mass / Volume = 54g / 20 cm^3 ≈ 2.7 g/cm^3
2. Now, compare the calculated density (2.7 g/cm^3) with the densities of known metals. Below are the approximate densities of some common metals for reference:
- Aluminum: 2.7 g/cm^3
- Iron: 7.9 g/cm^3
- Copper: 8.9 g/cm^3
- Silver: 10.5 g/cm^3
- Gold: 19.3 g/cm^3
Based on your calculated density, the unknown metal most closely matches the density of aluminum. Therefore, the likely identity of the unknown metal is aluminum. Keep in mind that this is an estimation, and other factors, such as impurities or alloys, can affect the density. Additional tests or analysis may be required for a definitive identification.