Question

Define the following laws

a) Law of definite proportions

b) Law of multiple proportions

c) Law of conservation of mass

2. Define the following SI Unit (name of unit and symbol)

a) Length

b) Mass

c) Time

d) Electric current

e) Temperature

f) Amount of substance

g) Luminous intensity

Answer 1

law of constant composition states that a given chemical compound always contains its component elements in fixed ratio that does not depend on its source and method of preparation

law of multiple proportion  statement that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

SI units are

length

mass

time