Constants I Periodic Table Learning Goal: To use Avogadro\'s number to convert b
ID: 714520 • Letter: C
Question
Constants I Periodic Table Learning Goal: To use Avogadro's number to convert between microscopic units of atoms and molecules to the macroscopic world of chemical experiments. A mole is a unit of matter that represents a known number of particles that is large enough to be weighed on a laboratory balance. One mole of substance contains 6.022 x 1023 formula units, as shown in the following unit factor 6.022 x 10 formula units 1 mol substance The value 6.022 1023 is called Avogadro's number. The term formula unit is a generic phrase that can mean a molecule, atom, ion, or whatever is represented by the chemical formula. For example a mole of He contains 6.022 x 1023 helium atoms A mole of N2 contains 6.022 x1023 diatomic N2 molecules but double that number of nitrogen atoms You can can extend the analysis to samples of a given mass using the molar mass of a compound which is the mass of a mole of the compound. The molar mass of N2 is 28 01 g/mol Therefore you can say that a mole of Na has a mass of 28.01 g and contains 6.022 x 10m molecules of the gasExplanation / Answer
No of moles of butane= mass/molar mass=2.5/58=0.0431 moles
No of carbon atoms= 0.0431x6.022x10*23= 0.259x10*23= 2.59x10*22 atoms