how many atoms are present in 1.9 into 10 raise to the power minus 6 gram. atomic mass of chlorine is 19.
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HI there !!
There is a slight mistake in the question.
Actually ,
Molar mass [ atomic mass ] of chlorine = 35.5 u
Given mass = 1.9 × 10⁻⁶ grams
So ,
No: of moles = Given mass / Molar mass
= 1.9 × 10⁻⁶ / 35.5
= 0.000000054 moles
No : of atoms = No: of moles x Avogadro number
= 0.000000054 × 6.022 × 10²³
= 0.000000325 × 10²³ atoms
There is a slight mistake in the question.
Actually ,
Molar mass [ atomic mass ] of chlorine = 35.5 u
Given mass = 1.9 × 10⁻⁶ grams
So ,
No: of moles = Given mass / Molar mass
= 1.9 × 10⁻⁶ / 35.5
= 0.000000054 moles
No : of atoms = No: of moles x Avogadro number
= 0.000000054 × 6.022 × 10²³
= 0.000000325 × 10²³ atoms
HarmillonSingh:
thanks very much dear
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