Question

One part of an element A combines with two parts of B (another element). Six parts of the element C combine with four parts of the element B. If A and C combine together the ratio of their masses will be governed by:
A. Law of definite proportions
B. Law of multiple proportions
C. Law of reciprocal proportions
D. Law of conservation of mass

Answer 1

For the step by step solving process we first have to inlay that the question statement is asking for the part by part comparison. Now we can define all the given laws in the options so that we can decide which one is the law for the given problem. After the comparison we can get the correct answer.

Complete step by step answer: The first step is to determine what does the given question regards to and in this case it deals with the reaction in parts. We must have to notice the conditions given in the problem statement.
According to it the reaction quotients are given in parts, thus making it pretty reasonable to get the answer. To get that we have to apply the reaction procedures in the situations and then we can get the desired outcome.
Now, we have to define every law as an option so that we can distinguish the right answer.
According to the Law of definite proportions, every chemical compound contains a particular fixed and constant proportions (by mass) of its constituent elements in the reaction.
According to the Law of multiple proportions, whenever the two elements are combined with each other in order to form more than one compound, then the weights of any one element that combine in the reaction with a fixed weight of the other are in a ratio of small whole numbers.
According to the law of reciprocal proportions the weights of two elements combining with a fixed amount of the third element will bear the same ratio (or simple multiple of it) in which they themselves react.
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
This gives us the answer that is option C.

Note: The law of reciprocal proportions which is also called as the law of equivalent proportions or the law of permanent ratio, is widely considered as one of the basic laws of stoichiometry. It relates the proportions in which elements combine across a number of different elements. It was first given and formulated by Jeremias Richter in 1791.