Asample of gold (au) has a mass of 26.15 g. given that the theoretical density is 19.30 g/ml, what is the volume of the gold sample?

The volume of the gold sample will be 22 g/ml.

Explanation:

Density is defined as the mass contained per unit volume.

Given :

Density of sample of gold =

Mass of sample of gold = 26.15 grams

Volume of sample of gold = ?

Putting in the values we get:

Thus volume of the gold sample will be 1.35 ml.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.