Chemistry: How do you calculate the atomic mass number ?

How do you calculate the atomic mass number ?

neariah24

14.12.2021

Mass of water needed : 96.3 g

Further explanation

A mole is a number of particles(atoms, molecules, ions) in a substance

This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles H₂O=

$\tt moles=\dfrac{N}{No}\\\\moles=\dfrac{3.22\times 10^{24}}{6.02\times 10^{23}}\\\\moles=5.35$

mass H₂O(MW=18 g/mol) :

$\tt mass=moles\times MW\\\\mass=5.35\times 18\\\\mass=96.3~g$

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