Question

According to the equation,
$nC{H_2} = C{H_2} \to {\left( { - C{H_2} - C{H_2} - } \right)_n}$
When $100g$ of ethylene polymerizes to polyethylene, then the weight of polyethylene produced will be.
A) $\dfrac{n}{2}g$
B) $100g$
C) $\dfrac{{100}}{n}g$
D) $100ng$

Answer 1

Hint: We grasp that according to the law of conservation of mass, the mass of the merchandise throughout a reaction should equal the mass of the reactants.The law states that mass will neither be created nor destroyed, albeit if it should be rearranged in space, or the entities associated with it’s going to be modified in form.

Complete step by step answer:
We have to remember that on the basis of the law of conservation of mass, matter will neither be created nor destroyed; so the general quantity of matter, i.e., the whole mass, ahead of and once a change stays an equivalent. So, the mass of the substances, taken together, before and after a chemical change, conjointly can remain the same. From this, it is usually finished that any new substance shaped during a chemical process is due to the rearrangement of the atoms of the primary substance. The number of atoms of every kind remains associate equivalent, before and once the chemical changes.
As per the law of mass of preservation, $100g$ of ethylene polymerizes to give $100g$

So, the correct answer is Option B.

Additional Information:
We must remember that the ultimate supply of energy in our gift universe is that the huge Bang. All the energy was created at the start of your time and because the universe grew many stages of material developed, made from that energy. By the time of the trendy Universe, the energy was distributed either into mass, or K.E. or energy in lumps of matter, or beaming energy. The plenty are classified into galaxies and stars at intervals. The sun is one in all those stars and got the energy from the primeval big Bang.

Note: We have to remember that the law of conservation of mass is beneficial for a variety of calculations and may be wont to solve for unknown masses, such as the quantity of gas consumed or produced during a reaction.
The law of conservation was later amended by Einstein within the law of conservation of mass-energy, which describes the very fact that the entire mass and energy during a system remain stable.