Mg + H2SO4→MgSO4 + H2 30g of magnesium sulphate is formed when 6g of magnesium reacts with an excess H2SO4. Number of Moles = (Mass of the... View Article
There are three zones in a candle flame. All these three zones have different colour and temperatures. Outer zone This is the first zone This... View Article
The standard molar enthalpy of the formation of carbon (CO2) is equal to the standard molar enthalpy of combustion of carbon (graphite). The... View Article
The various postulates of Daltons' atomic theory of matter are: 1. All matter is made up of tiny and invisible particles called an atom. 2. Atoms... View Article
Answer: (C) NH3. Bond angle can be defined as the angle formed between two covalent bonds that originate from the same atom. The geometric angle... View Article
The adsorption isotherm is a curve that defines the relation between the amount of gas adsorbed by the adsorbent with pressure at a constant... View Article
The two isotopes of chlorine, Cl-35 and CI-37 would be placed in the same slot because of their same atomic number and similar chemical... View Article
In Mendeleev's periodic table, noble gases like helium, neon and argon were not mentioned because of the following reasons: Noble gases are... View Article
Mendeleev left some gaps in his periodic table so that the elements with similar properties fell in the same vertical column or groups of his... View Article
The two criteria used by Mendeleev to classify the elements in his periodic table are: Increasing atomic mass Grouping of elements having... View Article
The elements are classified into different groups and periods based on their properties. The classification of elements helps us to learn,... View Article
Reversible Change --A change that can be reversed is called a reversible change. The freezing of ice and the melting of wax are examples of... View Article
The electron-dot structure is the diagrammatic representation of elements that show the bonding between atoms of a molecule, the lone pairs of... View Article
Halogens are strong oxidising agents because they have a high tendency to accept electrons. The halogens are a Group 17 element in the periodic... View Article
The electrons left in the valence shell are 2. Xe (Xenon) has eight valence electrons and it shares six electrons with six Fluorine (F) atoms to... View Article
