How many moles are equal to 4.0x1023 atoms of germanium?

0.66 mol Ge

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

4.0 × 10²³ atoms Ge

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Set up:                    Divide:                    

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

0.664321 mol Ge ≈ 0.66 mol Ge

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

It is sure ( overimitation)