Question

Sonu is a gold trader who sells 10 moles of gold every day. How many grams of gold does he sell per month (Consider 30 days per month).The atomic mass of gold is 197 u. ​

Answer 1

Given:-

→ Moles of Gold Sonu sells everyday = 10

To find:-

→ Grams of gold that Sonu sells per

month .

Solution:-

• Atomic mass of Gold [Au] = 197u

Thus, molar mass of gold is 197g/mol.

Now, we know that :-

∵ No of moles = Given Mass/Molar mass

∴ Mass = No of moles × Molar mass

So, grams of gold Sonu sells per day :-

= 10 × 197

= 1970g

Hence, grams of gold he sells per month :-

= 1970 × 30

= 59100g

Thus, Sonu sells 59100 grams of gold

per month.

Some Extra Formulae :-

Number of atoms :-

= No of moles × Avogadro Number

Number of molecules :-

= No of moles × Avogadro Number

Molar mass :-

= Mass/No of moles

Answer 2

Answer:

Number of moles sold by Sonu per day = $\sf{10 \ moles}$

Mass of gold [in 'u'] = $\sf{197 u }$

∴ Molar mass of gold = $\sf{197g}$

Sells per day = $\sf{10 \times 197g = 1970g}$

Or,

Mass of gold sold in 1 month = $\sf{1970g \times 30 = 59100g}$.

______...

More atomic masses:-

1. $\tt{ H = 1 u \ (Lightest)}$,
2. $\tt{ He = 4 u }$,
3. $\tt{C = 12 u}$,
4. $\tt{ N = 14 u}$,
5. $\tt{O = 16 u}$,
6. $\tt{ Na = 23 u }$,
7. $\tt{Mg = 24 u}$,
8. $\tt{S = 32 u}$,
9. $\tt{ Ca = 40 u}$,
10. $\tt{ Fe = 56 u}$,
11. $\tt{ P = 31 u }$,
12. $\tt{ Al = 27 u}$,
13. $\tt{K = 39u }$,
14. $\tt{Zn = 65 u }$
15. $\tt{U = 238 u \ (Heaviest)}$.

Find more!