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kg mol-1. Example. Calculate the number of moles of oxygen molecules in 4g. oxygen molecules have the formula O2 the relative mass will be 2 x 16 = 32 so the molar mass will be 32g mol-1. moles = mass.
Molar mass tells us the mass of 1 mol of an atom or compound. In each case we simply calculate the sum of the masses of the atoms in the formula to determine the mass of a mole. These masses can be found on the periodic table. EXAMPLE: Calculate the molar mass of a mole of iodine, I2.
Physics. Kinetic Theory of Gases Equation. Assumptions in Kinetic Theory. Gases consist of atoms or molecules randomly moving around at high speeds. The kinetic theory of gases models the thermodynamic behaviour of gases by linking the microscopic properties of particles (mass and speed) to macroscopic properties of particles (pressure and volume)
The empirical formula is the simplest whole number ratio of the atoms of each element present in one molecule or formula unit of the compound. E.g. the empirical formula of ethanoic acid is CH 2 O. Organic molecules often have different empirical and molecular formulae.
Key fact. \ (The~Avogadro~constant = 6.02~\times10^ {23}\) The Avogadro constant is defined as: the number of carbon atoms in exactly 12 g of carbon-12, 12 C. One mole, 1 mol, of a...
Download PDF. Test yourself. Author. Stewart. Expertise. Chemistry Lead. Mole & Avogadro Constant. The Avogadro constant (NA or L) is the number of particles equivalent to the relative atomicmass or molecular mass of a substance. The Avogadro constant applies to atoms, molecules, ions and electrons. The value of NA is 6.02 x 1023 g mol-1.
Structural formula A structural formula of a compound shows which atoms are attached to which within the molecule. Atoms are represented by their chemical symbols and lines are used to represent ALL the bonds that hold the atoms together. Structural isomer Organic molecules with the same molecular formula, but different structural formulae.
