The term amorphous solids is in some books synonymously termed glass. Amorphous solids are substances which lack a crystalline structure. They are solids which can flow like liquids. Their molecules are not arranged in any definite lattice pattern and this gives them some unique properties that enable them to be used to make bottles.
1. In response to mechanical force, amorphous solids are not willing to break into smaller lattices like crystalline solids, therefore they are more shatter resistant.
2. They are more sturdy
3. They soften more easily than crystalline solids and therefore more readily manipulated.
4. They do not have a distinct melting point and so they are more easily recycled.
Answer:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
Definition:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
If 10.0 g of calcium carbonate produced 3.8 g carbondioxide and 6.2 g calcium oxide than according to this law,
CaCO₃ = CaO + CO₂
10.0 g = 6.2 g + 3.8 g
10.0 g = 10.0 g
This reaction followed the law of conservation of mass.
Answer:
1)Na20
let the valency of Na is x
2(x)+2=0
+2x+2=0
2x=-2
x=-1
2)ZnO
let the valency of Zn is x
x+2=0
x=-2
3)Al2O3
let the valency of Al is x
2(x)+3(2)=0
2x+6=0
2x=-6
x=-3
4)MgO
let the valency of Mg is x
x+2=0
x=-2