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18-09-2016
Chemistry

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How many atoms are in 187 g of Calcium?

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Willchemistry Willchemistry

18-09-2016

Atomic mass Calcium ( Ca) = 40.078 u.m.a

40.078 g --------------- 6.02x10²³ atoms
187 g ------------------- ??

187 x ( 6.02x10²³) / 40.078 =

1.125x10²⁶ / 40.078 = 2.808x10²⁴ atoms

hope this helps!

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