Question

A atudent used a carbon pencil to write home work.The mass of this was found to be 5 mg .With the help of this calculate.B.The no. Of carbon atoms in 12mg of his homework writing

Answer 1

Answer:

602200000000000000000

Explanation:

Relative atomic mass of carbon = 12

We can calculate how many moles there are in 5mg of carbon with the formula

Number of moles = Given mass/ Molar mass

Given mass = 0.012g (divide by a thousand to convert into grams)

Molar mass = 12g

Hence we get the number of moles = 0.001

We can then find out how many atoms there are by multiplying the number of moles by Avogadro's constant 6.022 x 10^23

The number of carbon atoms in 12mg of atom is = 602200000000000000000