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Answer compare 1 mole of h2, 1 mole of o2, and 1 mole of f2. (a) which has the largest number of molecules? explain why. (b) which has the greatest mass? explain why.

Respuesta :

Given-

one mole of [tex]H_{2}[/tex], one mole of [tex]O_{2}[/tex] and one mole of [tex]F_{2}[/tex].

  • Mole is a SI unit to measure the number of atoms or molecules in a sample.
  • Mathematically 1 mole is equal  to the (6.022 ×[tex]10^{23}[/tex])  number of atoms .
  • (6.022 ×[tex]10^{23}[/tex]) numbe rof atoms is generally referred as Avagadro's number.

a)  As each mole consists of same number of atoms or molecules i.e.

(6.022 ×[tex]10^{23}[/tex])  , therefore one mole of [tex]H_{2}[/tex], one mole of [tex]O_{2}[/tex] and one mole of [tex]F_{2}[/tex] have same number of molecules.

b) Mass of 1 mole of substance is known as its molar mass.

Thus , mass of 1 mole of [tex]H_{2}[/tex] = 2× (1.0 g/mol) = 2.0 g/mol

Mass of 1 mole of [tex]O_{2}[/tex] = 2× (16.0 g/mol) = 32.0 g/mol

Mass of 1 mole of [tex]F_{2}[/tex] = 2× (19.0 g/mol) = 38.0 g/mol

Therefore, 1 mole of [tex]F_{2}[/tex] ha sthe highest mass among the given options.

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