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How to solve no. of atoms per mol ..? |
| Answer» A\xa0mole is defined as the mass of the substance which consists of the equal quantity of basic units. Example atoms in 12 grams are the same as 12C. The basic units can be molecules, atoms or formula units based on the substance. A mole fraction indicates the number of chemical elements.\xa0One mole of any substance is equal to the value of 6.023 x 1023\xa0(Avagadro number). It can be used to measure the products obtained from the chemical reaction. The unit is denoted by\xa0mol.The formula for the number of moles formula is expressed asNumber of Moles = mass of substance/, the mass of one moleExample 1:\xa0Determine the number of moles in 95g of MnO2.Solution:GivenMass of MnO2\xa0= 95gMass of one mole MnO2\xa0= 86.94gNumber of moles formula isNumber of moles = Mass of substance / Mass of one moleNumber of moles = 95 / 86.94Number of moles =\xa01.092 mol\xa0 | |