Question

A small block at rest at the top of a smooth inclined plane of inclination theta starts sliding down the plane Sn

Answer 1

Answer:

hi

Explanation:

Required Answer:-

We have:

46 g of NO2

To FinD:

Total no. of atoms in the given mass?

Step-by-step Explanation:

GiveN mass of Aluminium oxide = 46 g

Molecular mass = 14 + 2 × 16 = 46

No. of moles of NO2:

= Given Mass / Molecular mass

= 46 g / 46 g

= 1 mole of NO2

We know that, 1 mole of any compound contains 6.022 × 10²³ molecules. Then,,

No. of molecules in 1 moles NO2:

= 1 × 6.022 × 10²³

= 6.022 × 10²³ molecules of NO2

1 molecule of NO2 contains 1 atoms of Nitrogen and 2 atoms of oxygen. Total there is 3 atoms in each molecule.

No. of atoms in 1 molecule of NO2:

= 6.022 × 10²³ × 3

= 18.066 × 10²³

= 1.8066 × 10²⁴ atoms in total.

Hence:

There are 1.806 × 10²⁴ atoms in the given mass of NO2 (Option C).