Question

How many atoms are in a sample of 175 grams of sodium (Na)? The answer needs to be
a x 10^b

Answer 1

Atomic mass Sodium ( Na ) = 22.98 u.m.a

22.98 g ----------------- 6.02x10²³ atoms
175 g ------------------- ?? atoms

175 x ( 6.02x10²³) / 22.98 =

4.58x10²⁴ atoms of Na

hope this helps!