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When we talk about the mass of atoms, the mass of their particles is taken into consideration. Electrons have negligible mass. Hence the mass of an atom is the sum of the mass of protons and neutrons. The mass number is denoted by A. A molecule is the smallest unit (particle) of a compound having the physical and chemical properties of that ...
The mass of a hydrogen molecule is3.32×10 27kg. If 1023 hydrogen molecules strike, per second, a fixed wall of area 2cm2 at an angle of 45° to the normal, and rebound elastically with a speed of 103m/s, then the pressure on the wall is nearly:
The molecular formula of hydrogen is H 2. Hydrogen has been recognized as a convenient, clean-burning fuel. It can be stored as a compressed gas or as a liquid and is suitable for internal combustion engines in automobiles. Hydrogen itself is non-toxic and not carcinogenic. Hydrogen can be produced from coal and water.
The chemist Lavoisier gives the name hydrogen. It got its name from the Greek word “hydro” meaning water. Lavoisier knew that it existed in every water molecule. Preparation of Dihydrogen – H 2 1. Laboratory Preparation of Dihydrogen (i) Typically, hydrogen is created when powdered zinc reacts with diluted hydrochloric acid. Zn + 2H + → ...
It is also known as hydrogen chloride or muriatic acid. When hydrogen chloride is dissolved in water HCl is formed. It is a simple diatomic molecule. The hydrogen and chlorine atom are connected with a single covalent bond. The bond between them is polar as the chlorine atom is more electronegative when compared with the hydrogen atom.
The mass of hydrogen molecule is 3.32 × 10 27 kg. If 1023 hydrogen molecules strike per second at 2 cm 2 area of rigid wall of a close container normally and rebound back with the speed of 1000 m / s, then the pressure exerted on the wall according to kinetic theory of gas isA. 3000 N / m 2B. 6640 N / m 2C. 8320 N / m 2D. 3320 N / m 2
It can be calculated by adding the mass of each atom multiplied by the number of atoms of the element present in the molecule. For example, water is made up of 2 hydrogen atoms and 1 oxygen atom. The mass of a water molecule is equal to the average atomic mass of hydrogen multiplied by two plus the atomic mass of oxygen.
Molar mass = mass/mole = g/mol. The definition of atomic mass, the mole, and molar mass are all directly or indirectly related to carbon-12. This leads to two important facts. The mass of one atom of carbon-12 the atomic mass of carbon-12 is exactly 12 atomic mass units. The mass of one mole of carbon-12 atoms is exactly 12 grams; its molar ...
Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses: H = 1 u; Br = 80 u) Q. Amongst H 2 O , H 2 S , H 2 S e a n d H 2 T e and the one with the highest boiling point is
Since hydrogen is the lightest element on the modern periodic table, dihydrogen is the lightest known molecule. Since the standard atomic weight of the hydrogen atom is 1.008u, the molecular weight of the dihydrogen molecule is 2.016 atomic mass units.