physical and chemical properties of ammonia

Nuclear Energy and Chemical Energy - Nuclear energy is released when very small particles of matter split or combine. After the split or combination, they result in small particles or heavy particle. The rest of the mass is changed into energy. This process of changing mass into energy pr..

Isotopes of an element have same atomic number (Z) but different mass numbers (A). For example, 1 H 1 , 1 H 2 , 1 H 3 are isotopes of hydrogen;..

Isotopes - These are the elements having same atomic number but different mass number. They have the same atomic number because the number of protons inside their nuclei remains the same. The difference in their mass number is due to the difference in their number of neutrons. Since they are neutra..

.I. Unit of Z is kg/coulomb (kg C -1 ). 2. When the same amount of charge is made to pass through any number of electrolytes, the masses of the substances liberated or deposited at the electrodes are proportional to their chemical equivalents. i.e., if m 1 and m 2 are the masses and E 1 a..

In effect, copper is dissolved off the anode and deposited at the cathode. In this process one copper atom is deposited at the cathode for each pair of electrons flowing through the connecting wires. Electrolysis of AgNO 3 : Ag + ions move towards the cathode and are neutralized by the el..

The lines of force or field lines 1) start from positive charges and end at negative charges. In the case of a single charge, they may start or end at infinity. 2) two field lines can never intersect each other. 3) contract longitudinally. 4) exert lateral pressure on one another. 5) are..

This is a portable form of Leclanche Cell. A moist paste of NH 4 Cl and ZnCl 2 is contained in a zinc vessel acting as the negative electrode. ZnCl 2 is added to the electrolyte NH 4 Cl. It keeps the paste moist because it is highly hygroscopic. The top is sealed with shellac or..

We heat raw food to soften it. We freeze water into ice by cooling it in refrigerator. When we boil water in a kettle we observe the steam oozing from the mouth of the kettle. When the cork is difficult to remove, we slightly heat the mouth of the bottle, so that the cork comes out easily. Through ..

The number of protons or the number of electrons in an atom in its normal state is called the atomic number and is denoted by Z. The nucleus of every element contains Z protons and some number of neutrons. The electrons, having the same charge as a proton but of opposite sign, nullify the charge of..

Isotopes are chemically same and physically different. But the converse is true in isobars. That is isobars are elements, which are chemically different but physically same. So, isobars are atoms of different elements having the same atomic mass but differen..