Which of the following is known as “Laws of chemical combination”? 1 pointa) Law of Constant proportionsb) Law of conservation of massc) None (a) and (b)d) Both (a) and (b)

The "Laws of chemical combination" refers to the principles that govern the way elements combine to form compounds. The options given are:

a) Law of Constant proportions b) Law of conservation of mass c) None (a) and (b) d) Both (a) and (b)

To determine which of these options is known as the "Laws of chemical combination," we need to evaluate each option:

a) The Law of Constant proportions states that a compound always contains the same elements in the same proportion by mass. This law is relevant to the study of chemical combinations.

b) The Law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction. This law is also relevant to the study of chemical combinations.

c) The option "None (a) and (b)" suggests that neither of the laws mentioned is known as the "Laws of chemical combination."

d) The option "Both (a) and (b)" suggests that both the Law of Constant proportions and the Law of conservation of mass are known as the "Laws of chemical combination."

Based on the explanations above, the correct answer is option d) Both (a) and (b).