Question

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

Answer 1

Answer:

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, $N_A$, which is presented as follows;

1 mole of a substance contains $N_A$ = 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.