Compounds with high melting points have ___
a. Covalent bonds
b. Metallic Bonds
c. Ionic bonds***
d. No chemical bonds
How could you determine if a sample of gold is pure?
Compare the sample's density with that of pure gold.***
Compare the sample's color with that of pure gold.
Determine whether the sample is magnetic.
Determine whether the sample will fizz in contact with hydrochloric acid.
I think both answers are right. Metallic bonds often are higher melting point but they aren't compounds.
To determine if a sample of gold is pure, you can compare the sample's density with that of pure gold. If the density of the sample matches that of pure gold, it is likely to be pure.
To determine if a sample of gold is pure, you can compare its density with that of pure gold.
The steps to compare densities are as follows:
1. Obtain a sample of gold with a known purity level.
2. Weigh the sample using a balance or scale. Make sure to record the mass of the gold sample.
3. Fill a graduated cylinder with a known volume of water. Record the initial volume of water.
4. Carefully drop the gold sample into the graduated cylinder, making sure it is fully submerged in the water.
5. Observe the change in water level and record the final volume of water.
6. Calculate the volume of the gold sample by subtracting the initial volume of water from the final volume of water.
7. Calculate the density of the gold sample using the formula: Density = Mass / Volume.
8. Compare the calculated density of the gold sample with the known density of pure gold.
If the calculated density matches the known density of pure gold, then the sample is likely pure. However, if the calculated density is significantly different from the known density of pure gold, then the sample may contain impurities.