Answer:
Hardness (H) is the resistance of a mineral to scratching. The degree of hardness is determined by observing the comparative ease or difficulty with which one mineral is scratched by another or by a steel tool.
Explanation:
https://www.britannica.com/science/mineral-chemical-compound/Hardness Hope this helps
Answer:
A hydrogen atom is an atom of the chemical element hydrogen.Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.
In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
Explanation:
D) relieving fishing pressure on over fished species
Answer:
0 current
Explanation:
Ca+ initial concentration is same both inside and outside, therefore there will be zero current on initial membrane. The membrane voltage is set at 58 multivolts which cause current flow in membrane and cell membrane is charged positively.