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klio [65]
2 years ago
14

Fish and reptiles share which of these traits?

Chemistry
1 answer:
Naddika [18.5K]2 years ago
8 0
I think it might be a or b but I’m 97% sure the answers is b
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How many neutrons are there in 8 molecules of <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B19%7D%7B9%7D%20f2" id="TexFormu
slega [8]

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

4 0
3 years ago
Can someone please help me with this question? Thanks in advance.
sveta [45]

Answer:

1. Fe + H2SO4 = FeSO4 + H2

iron + sulfuric acid = duretter + hydrogen

2. Mg + 2 HNO3 = Mg(NO3)2 + H2

Magnesium + nitric acid = magnesium nitrate +hydrogen

3. Zn + 2 HCl = ZnCl2 + H2

Zinc + hydrogen chloride= zinc chloride+ hydrogen

6 0
3 years ago
Read 2 more answers
True or false?<br><br> When sodium and chlorine combine and bond, a molecule is formed.
CaHeK987 [17]

When Sodium and Chlorine come together they transfer an electron.

- Source: google


Hopefully this was clear and you understood!

3 0
3 years ago
Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here: 750 J electrical energy is
Alchen [17]

B) It was transformed into 350 J of heat energy.

Explanation:

The remaining 350J of energy must have been transformed into 350J of heat energy.

A fan works by converting electrical energy into heat energy.

  • According to the third law of thermodynamics "no system is 100% efficient". The conversion of the energy from one form to another involves a lost in energy.
  • Heat is one very familiar way by which energy can be lost.
  • Some component energy is used to heat the fan in the process and it is a wasted energy.
  • Friction surfaces a heat energy in this process.

learn more:

Third law of thermodynamics brainly.com/question/3564634

#learnwithBrainly

6 0
3 years ago
What is heat energy in science ​
Ket [755]

Answer:

Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. Heat energy can be transferred from one object to another. the transfer or flow from one object to another is called heat.

hopefully this helped :3

4 0
3 years ago
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