(you will get brainliest)matter may be classified as a pure substance or a mixture. where on the venn diagram would you insert the term "pure substance"?
a) a
b) b
c) c
d) d

Option (B) is the correct answer.

Explanation:

Anything that has space and occupies volume is known as matter.

A pure substance can be molecule of an element or molecule of a compound.

A molecule can have atoms of either same or different element. Whereas a compound has atoms of different elements.

For example, is a molecule with similar atoms, that is, hydrogen element.

is a compound that contains hydrogen and oxygen atom.

Thus, we can conclude that pure substance contains molecule of an element or molecule of a compound.

0.0512 kJ

Explanation:

From the given information, since the values were not given:

Then, Let assume that:

A set of 50 titanium rods is handled by the engineer, with 50cm length and 20g of mass.

The overhead walkway = 5.3 m

In this process, 12 rods roll of the walkway

We are to determine the change in the Gravitational P.E

Change in P.E = final P.E- initial P.E

Change in P.E = (50 mgh) - (0)

Change in P.E =  

Change in P.E =  51.94 Joules

Change in P.E = 0.05194 Joules

Change in P.E ≅ 0.0512 kJ