How many neutrons are there in 8 molecules of

Question

3 years ago

6

la1" title=" \frac{19}{9} f2" alt=" \frac{19}{9} f2" align="absmiddle" class="latex-formula">

1 answer:

slega [8] · Answer 1 · 2022-03-15T00:39:43+03:00

Answer:

128 neutrons

Explanation:

<em>How many neutrons are there in 8 molecules of </em> $^{19} _9 F_2$ <em>?</em>

Step 1: Calculate the number of neutrons in 1 atom of F.

The atomic number (z) of F is 9 and its mass number (A) is 19. We can calculate the number of neutrons using the following expression.

n⁰ = A - Z = 19 - 9 = 10

Step 2: Calculate the number of neutrons in 1 molecule of F₂.

1 molecule of F₂ contains 2 atoms of F. The number of neutrons in 1 molecule of F₂ is:

(8 n⁰/1 atom F) × (2 atom F/1 molecule F₂) = 16 n⁰/1 molecule F₂

Step 3: Calculate the number of neutrons in 8 molecules of F₂

8 molecule F₂ × 16 n⁰/1 molecule F₂ = 128 n⁰