jonrare jonrare

26-09-2016
Chemistry

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How many atoms are in 149 g of calcium?

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Willchemistry Willchemistry

27-09-2016

Atomic mass Calcium => 40.078 u.m.a

40.078 g --------------------- 6.02x10²³ atoms
149 g ------------------------ ?? atoms

149 x ( 6.02x10²³) / 40.078 => 2.23x10²⁴ atoms of Ca

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