the mole agent

Sun, 03 May 2026 13:25:02 +0000

Atomic mass is the concept related to a single atom, whereas molecular mass relates to a group of atoms. If you are planning to proceed with this concept, then it is necessary to gain precise. Mole can be defined as the amount of substance that contains the same number of entities (atoms, molecules, ions etc) as the number of atoms present in 12g of the carbon 12 isotope. If we ask you to count the total number of stars in the sky, can you do that? No. Similarly, scientists can not count the exact number of atoms and molecules as they are too minute and too many. Therefore,. 74. Helium gas taken from a nuclear experiment contains the isotopes 'He and He. One mole of the gas weighs 3.25 g and has a pressure of 1.00 atm. What is the partial pressure of He? (1) 0.0125 atm (2).