Which of the following is a common industrial use for a mineral?

using iron to fortify cereals

using silver to create jewelry

using copper to make art pieces

using low-grade diamonds to cut materials

Option (d) is the correct answer.

Explanation:

It is known that a diamond is the hardest material according to Mohs scale. It also has highest thermal conductivity and that is why it is used in industrial applications.

It is used in the cutting and polishing of other tools or materials.  

Thus, we can conclude that out of the given options, using low-grade diamonds to cut materials is a common industrial use for a mineral.

they are all solids.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol