What will be the mass of one .^(12)C ato...

What will be the mass of one `.^(12)C` atom in `g`?

Text Solution

Verified by Experts

It is `1.992648 xx 10^(-23) g ~~ 1.99 xx 10^(-23)g`
It can be obtained by dividing gram atomic mass of carbon (12 g) with Avogadro's No. `(N_(A))`
`((12g))/(6.022xx10^(23))~~1.99xx10^(-23)g`.

Topper's Solved these Questions

MOLE CONCEPT
DINESH PUBLICATION|Exercise N.C.E.R.T (Long answer)|4 Videos
MOLE CONCEPT
DINESH PUBLICATION|Exercise Concept Based Question|49 Videos
MOLE CONCEPT
DINESH PUBLICATION|Exercise Board Examinations|35 Videos
HYDROGEN
DINESH PUBLICATION|Exercise LONG|1 Videos
NOMENCLATURE OF ORGANIC COMPOUNDS
DINESH PUBLICATION|Exercise MCQs|13 Videos

The mass of one C atom is:

`6.023 xx 10^(23) g`

`1.99 xx 10^(-23) g`

`2.00 g`

12 g

Assertion : One atomic mass unit is defined as one twelfth of the mass of one C-12 atom. Reason : C-12 is the least abundant isotope of carbon and has been choosen as the standard.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Assertion(A) One atomic mass unit is defined as one twelth of the mass of one carbon-12 atom. Reason(R) Carbon-12 isotope is the most abundant isotope of carbon and has been chosen as standard.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

A is true but R is false.

Both A and R are false.