Question

Answer the following questions about pencil drawing:

Answer 1

Answer:

1. 1795, that's when they were also invented

2. a gray crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors.

3.The second graphite grading scale is known as the HB scal

4. As the concentration of hydrogen ions in a solution increase, the more acidic the solution becomes. ... Thus, as the hydrogen ion concentration increases hydroxide ion concentration falls, and vice versa.

Answer 2

1. 1795.

2. Graphite is a mineral. It is extremely soft, with very light pressure, and has a very low specific gravity, used on pencils to write with.

3. HB stands for Hard Black on a pencil. It is a scale of the thickness and softness on a pencil.

4. I’m honestly not sure