Chemistry
animuck
2016-09-22 21:29:24
How many atoms are in a sample of 72.8 g calcium (Ca)?
ANSWERS
LilliBonte
2016-09-23 00:59:05

Atomic mass Ca = 40.078 a.m.u 40.078 g -------------------- 6.02x10²³ atoms 72.8 g ---------------------- ?? 72.8 x ( 6.02x10²³) / 40.078 = 4.38x10²⁵ / 40.078 = 1.093x10²⁴ atoms hope this helps!

Alkuklashaw
2016-09-23 01:00:20

Atomic mass Ca=40.078 a.m.u 40.078 g--------------------6.02x10²³  atoms 72.8 g ---------------------- ?? 72.8 x (6.02x10²³ ) / 40.078 = 4.38x10²⁵ / 40.078 = 1.093x10²⁴ atoms HOPE THIS HELPED :D

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