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Generally, we presume that most chemical and physical changes proceed to completion. A complete reaction is one in which all reactants have been converted into products. However, most chemical reactions do not go to completion because products react themselves to form the reactants. As a result, after sometime no further change takes place. Quantities of reactants and products remain unchanged, ...

Matter is simply defined as anything that has mass and occupies space. Our bodies as well as all the things around us are examples of matter. The Chemistry studies all types of matters that can exist in any of three physical states; solid, liquid or gas. A piece of matter in pure form is termed as a substance. Every substance ...

The knowledge that provides understanding of this world and how it works, is science. The branch of science which deals with the composition, structure, properties and reactions of matter is called chemistry. It touches almost every aspect of our life. The development of science and technology has provided us a lot of facilities in daily life. Imagine the role and ...

Chinese New Year is a holiday that celebrates the beginning of a new year according to the according to the Chinese lunar calendar. It is considered to be one of the most important holidays for Chinese families. The holiday is celebrated with big family gatherings, gift giving, the eating of symbolic foods and display and display of festive decorations — ...

Hazrat Muhammad’s ﷺ life is a perfect model and example for the people who want to attain goodness, piety and success in their individual as well social life. People can seek light from the message and guidance from his life to achieve perfection in the moral, spiritual and social areas of life. He ﷺ has set very high and noble ideas through ...

To find the solution set of a quadratic equation, following methods are used: factorization completing square use of quadratic formula

An equation of 2nd degree is called quadratic equation. In more detail, the quadratic equation is an equation, which contains the square of the unknown (variable) quantity, but no higher power. General or standard form of a quadratic equation: A 2nd degree equation in one variable x of the form as below, where a ≠ 0 and a, b, c are ...

Set A is said to be a subset of a set B, if and only if each element of A is an element of B. It is denoted by A ⊆ B Super Set If a set A is a subset of set B then set B is a super set of set A. It is denoted by B ⊇ ...

Q. What is the importance of Muslim Countries in the world? The strategic value of a region in world affairs depends upon its economic, political, commercial and military importance. Of all the factors, the military importance of a region is of paramount consideration in the present day world. The military importance, among other factors, depends upon the location of a ...

A set is a collection of well defined distinct objects or symbols. Well defined objects mean that the objects possess a property that enables one to determine whether a given object is in the collection or not. For example, a set cannot consist of elements like moral values, concepts, evils or virtues. Element of a set Each object in the ...