Question

there are 200 million people in Pakistan.If you were to distribute 100 to each person in form of 5 rupee coin, how many moles of coins you must have?

Answer 1

As there are 100 rupees that needs to be distributed to each person in form of 5 rupee coin.

So , each person will get = $\frac{100}{5}$

                                        =20 coins.

As there are total of 200 million people=$200 \times 10^{6} \times 20 coins$  

                                                                   =$4000 \times 10^{6} coins$

$1 mole =6.023 \times 10^{23} molecules$

Considering number of coins as number of molecules, then number of moles in $4000 \times 10^{6} molecules$  

=$\frac{4000 \times 10^{6}}{6.023 \times 10^{23}} moles$

=$6.6 \times 10^{-15} moles$

Answer 2

Explanation:

As there are 100 rupees that needs to be distributed to each person in form of 5 rupee coin.

So , each person will get = \frac{100}{5}

5

100

=20 coins.

As there are total of 200 million people=200 \times 10^{6} \times 20 coins200×10

6

×20coins

=4000 \times 10^{6} coins4000×10

6

coins

1 mole =6.023 \times 10^{23} molecules1mole=6.023×10

23

molecules

Considering number of coins as number of molecules, then number of moles in 4000 \times 10^{6} molecules4000×10

6

molecules

=\frac{4000 \times 10^{6}}{6.023 \times 10^{23}} moles

6.023×10

23

4000×10

6

moles

=6.6 \times 10^{-15} moles6.6×10

−15

moles