Which mineral would most likely be found in a necklace? graphite, halite, sulfur, or emerald?
2 answers:
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Answer:
128 neutrons
Explanation:
<em>How many neutrons are there in 8 molecules of </em><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
The number of oxygen atoms = 3
Mass = 24 g
<h3>Further explanation</h3>The formula of a compound shows the composition of the constituent elements
CaCO₃ is composed of 3 types of elements, namely Ca, C and O
The amounts of each of these elements in the compound CaCO₃:
- Ca = 1
- C = 1
- O = 3
So the number of oxygen atoms = 3
mass of Oxygen :