Question

How many grams of Sodium will have the same number of atoms as 6 grams of Magnesium?

Atomic mass of Sodium is 23 u and atomic mass of Magnesium is 24 u.

Answer 1

92gm

Step-by-step explanation:

Atomic mass of Mg=24g=1 mole of Mg

∴ 24g =1 mole of Mg contain 6.022×10^23 atom

∴ 6gm contains 246.022×1023×6

=4×6.022×10^23 atoms

Now according to question, there are 6.022×1023 atoms of Na

23gm of Na contains 6.022×10^23 atoms

∴6.022×4×10^23 atoms of Na weighs 23×6.022×10^23×4/6.022×10^23⇒92gm