What of the following has mass ?
`6.023 X10^(23)` atoms of nitrogen

Which among the following has 23 chromosomes?

What is the mass in grams of each of the following : 6.023xx10^23 atom of P? (atomic mass: P=31).

Calculate the mass 10^20 atoms of C.

What is the mass of : 1 mole of nitrogen atoms ?

Write each of the following as decimals: 23 + 2/(10) + 6/(1000) .

Calculate the mass of 3.011 ( 10 *24 ) molecules of nitrogen gas.

Calculate mass of 10^20 atoms of oxygen.

Caffiene has a molecular mass of 194 . If it contains 28.9% by mass of nitrogen, number of atoms of nitrogen in one molecule of caffeine is :