Question

3.1 moles Na to atoms Na

Answer 1

Answer:
`1.9*10^(24)` rounded to 2 significant figures.

Step-by-step explanation:

1. Use Avogadro's number:
`6.022*10^(23)`

• This number represents the number of atoms per mole.

2. Set up an equation to multiply the number of moles by Avogadro's number

• 
  `3.1*(6.022*10^(23))`

3. Solve the equation.

• 
  `3.1*(6.022*10^(23))=1.86682*10^(24)`

4. Apply significant digits to round the number.

• 
  `1.9*10^(24)`

Answer 2

Since 1 mol Na = 6.02 × 1023 atoms Na, the two unit factors are 1 mol Na/6.02 × 1023 atoms Na, and its reciprocal 6.02 × 1023 atoms Na/1 mol Na.