Answer:
The given equation obey the law of conservation of mass.
Explanation:
Chemical equation:
2LiOH + CO₂ → Li₂CO₃ + H₂O
There are equal number of atoms of oxygen, hydrogen and lithium on both side of equation so it obey the law of conservation of mass.
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
2LiOH + CO₂ → Li₂CO₃ + H₂O
2(6.941 + 16 + 1) + 12+32 6.941×2 + 12 + 3×16 + 18
47.882 + 44 13.882 +12+48 + 18
91.882 g 91.882 g
The mass of reactants and product are equal.
Quantity of K2S m = 0.105 m
Number of ions i = 2(K) + 1(S) = 3
Freezing point depression constant of water Kf = 1.86
delta T = i x m x Kf = 3 x 0.105 x 1.86 = 0.586
Freezing point = 0 - 0.586 = 0.586 C
Boiling point constant of water Kb = 0.512
delta T = i x m x Kb = 3 x 0.105 x 0.512 = 0.161
Boiling point = 100 + 0.161 = 100.161 C
0.0782
You take the molar mass of Mg(OH)2 and divide 4.56 by that number and then make sure to round significant digits.
Answer:
The correct answer is B. causes environmental acidification due to production of sulfuric acid.
Explanation:
Sulphur causes environmental acidification due to production of sulfuric acid. For example,
Sulphur can be oxidized to sulphur dioxide according to the equation:
S +O2 ==> SO2
The sulphur dioxide combines with rain water and is washed down in form of weak acid according to the equation;
SO2 +H2O ==> H2SO3
The product is an acid known as trioxosulphate (V) acid which is a sulphuric acid. And so acidification of environment is possible.
Also as Sulfur can be found in the air in many different forms. It can cause irritations of the eyes and the throat with animals, when the uptake takes place through inhalation of sulfur in the gaseous phase. Sulfur is applied in industries widely and emitted to air, due to the limited possibilities of destruction of the sulfur bonds that are applied.
The damaging effects of sulfur with animals are mostly brain damage, through malfunctioning of the hypothalamus, and damage to the nervous system.