ASAP PLSSS How many atoms of strontium are in a sample of 33.6 mol strontium? 1) 4.22 x 1023 atoms Sr

2) 4.22 x 1024 atoms Sr

3) 2.02 x 1025 atoms Sr

4) 2.02 x1023 atoms Sr

33.6 mol of the atom strontium contains approximately

3) 2.02 × 10²⁵ atoms of strontium

Explanation:

The number of atoms in one mole of a substance is given by Avogadro's number number, , which is presented as follows;

1 mole of a substance contains = 6.022 × 10²³ elementary particles

33.6 mol of a substance will contain 33.6 × 6.02214 × 10²³ elementary particles of the substance

Therefore;

33.6 mol of the atom strontium contains 33.6 × 6.02214 × 10²³ = 2.023439 × 10²⁵ atoms of strontium

33.6 mol of the atom strontium contains ≈ 2.02 × 10²⁵ atoms of Sr.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.