A sample of an unknown metal has a mass of 428 grams and a volume of 20 cm3. What is the metal?

A. Chromium
B. Platinum
C. Lead
D. Silver

All the answers for: Mass, Weight, and Density Quick Check on Connexus.

1 D. Bailee is incorrect. The mass of the objects stay the same but weight will change.

2 A. Yes, they would still be balanced because their masses would not change.

3 B. m=D×V

4 B. Platinum

5 C. Quartzite

Well, if you have a metal that weighs 428 grams and has a volume of 20 cm3, it must be a metal known as "Magiclevitatingium!" It's a rare and mysterious metal that can defy gravity and make things float. Or, you know, it could also be lead (option C). But where's the fun in that?

To determine the metal, we can calculate its density and compare it to the densities of known metals.

The formula to calculate density is:

Density = Mass / Volume

Given:
Mass = 428 grams
Volume = 20 cm³

Using the formula:

Density = 428 g / 20 cm³

Density ≈ 21.4 g/cm³

Now, we can compare the density obtained with the densities of known metals:

A. Chromium - Density: 7.19 g/cm³
B. Platinum - Density: 21.45 g/cm³
C. Lead - Density: 11.34 g/cm³
D. Silver - Density: 10.49 g/cm³

From the comparison, we can see that the calculated density of approximately 21.4 g/cm³ matches the density of Platinum (B). Therefore, the unknown metal is most likely Platinum (B).

To determine the metal, we need to compare its mass and volume with the densities of different metals. Density is a measure of how much mass is contained in a given volume.

First, let's calculate the density of the unknown metal using the formula:

Density = Mass / Volume

Density = 428 grams / 20 cm^3

Density ≈ 21.4 grams/cm^3

Now, let's compare this density with the densities of the metals given.

The density of Chromium is approximately 7.19 grams/cm^3.
The density of Platinum is approximately 21.5 grams/cm^3.
The density of Lead is approximately 11.3 grams/cm^3.
The density of Silver is approximately 10.5 grams/cm^3.

Since the density of the unknown metal (21.4 grams/cm^3) is closest to the density of Platinum (21.5 grams/cm^3), we can conclude that the unknown metal is most likely Platinum.

Therefore, the answer is B. Platinum.

density of the metal is mass/volume = 428/20 = 21.4 g/cc so the metal is Pt or answer b.