because its molecular weight is 100.....
Streak and Mohs hardness are descriptive and identifying terms for minerals. Because sandstone could be composed of a multitude of different rock particles or minerals, a specific hardness or streak cannot be attributed to them.
Not in terms of relative mineral hardness, at 2.0-2.5 on the Mohs scale.
Corundum, at 9 on the Mohs scale, is second only to diamond in hardness, and is able to scratch all minerals below it on the scale, thus making it a dang good abrasive.
The Chemical Formula for Calcium Oxide is CaO.
No sodium has 11 electrons which means its valence are in the 3s2 orbit while Calcium has 20 electrons its valence electrons are in the 4s2 orbit which is much larger in terms of atomic radii
Hard water is a mixture of calcium, magnesium, and bicarbonate, sulphate, chloride, etc. Hardness of water is expressed in units of mg CaCO3 / L as if all calcium and magnesium were formed as CaCO3. This unit is how many mg of CaCO3 would precipitate per liter of hard water.
The chemical reaction goes faster if calcium carbonate is powdered.
Marble is known as Calcium Carbonate (CaCO3) in terms of chemical formula.
Water from regions around the World with abundance of Limestone (which is made up of ionic molecules of calcium oxide) and other calcium-containing rocks tend to have calcium ions dissolve into the water, which in terms would make water harder in certain regions.
The reaction is:CaCO3 + H2SO4 = CaSO4 + H2O + CO2
Sandstone is made chiefly of quartz or feldspar grains, and limestone of calcium carbonate grains. Sand grains are usually formed by the erosion of older rocks. Calcium carbonate grains may be formed by the evaporation of sea water, or by the deposition of the exoskeletons of sea creatures.
It is a grading technique for different type of materials in reference to their hardness it is not expressed in terms of stress unit, because it shows the resistance to indentation and it is calculated by dividing applied force by the surface area of indentation . it is closely relates to the micro structure of material. while the stress is given by dividing the normal force acted by cross sectional area , upon which it acts.
1. M-Alkalinity (also known as Total Alkalinity) measures the amount of carbonate, bicarbonate and hydroxide present in terms of "ppm as calcium carbonate". ( M-Alkalinity measurement is based on a sulphuric acid titration using a Methyl orange indicator that goes from yellow at a pH of 4.5 to orange at pH of 4.4 at the endpoint.) 2. P-Alkalinity measures the amount of carbonate and hydroxyl alkalinity present in terms of "ppm as calcium carbonate". P-alkalinity is measured down to a pH of 8.3. The M-alkalinity is measured down to a pH of 4.3.
This is normally expressed in terms of the radius: area = pi x radius2.This is normally expressed in terms of the radius: area = pi x radius2.This is normally expressed in terms of the radius: area = pi x radius2.This is normally expressed in terms of the radius: area = pi x radius2.
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