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Atomic Mass and Atomic Mass Unit

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Question

calculate number of particles in 128g of oxygen atoms?

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Solution

Dear student ,
Molar mass of oxygen = 16 g
16 g of oxygen atom contains = $6.022 \times 10^{23} p a r t i c l e s$
128 g of oxygen atoms = $\frac{6.022 \times 10^{23}}{16} \times 128$ = 48.17 $\times$ 10²³particles
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