how many atoms are there in 8.91 g si?
Atomic mass Si = 28.0855 u.m.a28.0855 g --------------- 6.02x10²³ atoms8.91 g ------------------- ?? atoms8.91 x ( 6.02x10²³) / 28.0855 =1.90x10²³ atoms of Sihope this helps!
