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16-12-2019
Chemistry

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what is the mass of calcium in 2.3•10^23 molecules of calcium phosphate

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shakha2017 shakha2017

16-12-2019

Explanation:

N(Ca)=3×N(Ca₃(PO₄)₂)=

=3×2.3×10²³=6.9×10²³

6.02×10²³→40g

6.9×10²³→Xg

m(Ca)=X≈45.85g

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