Question

How many atoms of gold are in 1 gram of gold?(At.weight of gold=197u)

Answer 1

Answer:

Given,

85% pure gold sample

That means in 100gm sample 85gm gold is present

We are given with 1gm sample

∴ Mass of gold =

$\: \: 85 \times {10}^{ - 2}$

We know, 1 mole of gold=197gm

197gm gold=

$6.023 \times {10}^{23}$

atoms of gold

$85 \times {10}^{ - 2}$

gm gold contains

$\frac{ 85 \times {10}^{ - 2} \times 6.023 \times {10}^{23} }{197}$

$= 2.598 \times {10}^{21}$

Atoms

$2.6 \times {10}^{21}$

Atoms

Explanation:

hope it's helpful to you ✌️

Answer 2

Explanation:

30.573 Billion-Billion Atoms

Hope that all made sense :). 30,573,183,730,000,000,000 = 30.573 Billion-Billion Atoms of Gold in 1 gram.