What is the total number of nitrogen atoms in 0.25 mole of no2 gas?

1.5*10^23 atoms

Explanation:

What is the total number of nitrogen atoms in 0.25 mole of no2 gas?

mole is the amount of a substance. Its is calculated as mass of a substance over molecular mass(g/mol).

it contains 1 avogadro constant

1 mol=6.02*10^23 avogadros constant

0.25mol=x

so cross and multiply to get the value of x

6.022140857( 74 ) × 10 ^23

0.25*6.022*10^23

nitrogen atoms in such a molar quantity of nitric oxide,

1.5*10^23 atoms

first one is the correct answer

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.