Answer:
54.1 % Ca, 43.2 % O, 2.7% H
Explanation:
Molecular formula for calcium hydroxide is Ca(OH)₂
As we don't have a mass of Ca(OH)₂ to find out the percentage composition, we consider that the question refers to 1 mol of compound.
1 mol of hydroxide weighs 74.08 g
1 mol of hydroxide has 1 mol of Ca, therefore 40.08 g are Ca
2 moles of O therefore 32g are O
2 moles of H therefore 2 g are H
Percentage composition is known as (Mass of element/Total mass) . 100
- (40.08 / 74.08) . 100 = 54.1 %
- (32 / 74.08) . 100 = 43.2 %
- (2 / 74.08) . 100 = 2.7%
40.078 moles , just copied and pasted to google and this is what i got
if two or more elements or chemical compounds come into contact with one another and there is enough COMPOUND present, a chemical change may be take place.
A. PROPERTY
B.
CHEMICAL REACTION
Ionic bonds are easily disrupted in aqueous solutions, as they can ionize readily and as a result be surrounded by the solvent, water, where the partial positive and negative charges would be surrounding the appropriate charge of the ions.
