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Tom [10]
3 years ago
7

The rusting of iron is due to its reaction with oxygen. An iron nail weighing 8.531 g was left outdoors for a period of one year

. After the one year it was found to have a mass of 12.197 g. How many grams of oxygen did the nail react with
Chemistry
1 answer:
Annette [7]3 years ago
4 0

Answer:

m(O₂) = 3.666 g

Explanation:

The rusting of iron is due to its reaction with oxygen. The balanced equation is:

4 Fe + 3 O₂ → 2 Fe₂O₃

According to Lavoisier's law of conservation of mass, the sum of the masses of the reactants is equal to the sum of the masses of the products.

m(reactants) = m(products)

m(Fe) + m(O₂) = m(Fe₂O₃)

8.531 g + m(O₂) = 12.197 g

m(O₂) = 3.666 g

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How many bonds and lone pairs are in the molecule SIH4?
lesantik [10]

Answer:

there are no valence electrons left over, so the molecule has four bond pairs and no lone pairs.

Explanation:

6 0
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How many potassium atoms are present in 0.01456 g of potassium??
leva [86]
Its going to be 2.81 x 1023 atoms 
8 0
3 years ago
I need help wit this can someone pls explain???
Crazy boy [7]

Based on the nature of the sub-atomic particles, the correct answers are:

5. No Charge

6. Negative

7. Neutrons and Protons

8. 35 electrons

9. atomic number is 5

10. atomic mass is 11

11. number of protons is 15

12. number of electrons is 20

13. number of neutrons is 30 (55 -25)

14. mass number is 7

15. number of neutrons is 11 (36 - 25)

<h3>What are the sub-atomic particles?</h3>

The sub-atomic particles are the electrons, protons, and neutrons.

The electron is negatively-charged, the proton is positively-charged, whereas, the neutron is neutral and has no charge.

The number of electrons in a neutral atom is equal to the number of protons.

The sum of protons and neutrons gives the mass number of the atom.

Considering the given questions:

5. What type of charge does a neutron have?

Answer = No Charge

6. What type of charge does an electron have?

Answer =  Negative

7. Which two subatomic particles are located in the nucleus of an

Answer = Neutrons and Protons

8. If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?

Answer = 35 electrons

9. What is the atomic number of the atom in the diagram above?

Answer = atomic number is 5

10. What is the atomic mass/mass number of the atom in the diagram above?

Answer = atomic mass is 11

11. How many protons are in the nucleus of an atom with an atomic number of 15?

Answer = number of protons is 15

12. How many electrons are in the nucleus of an atom with an atomic number of 20?

Answer = number of electrons is 20

13. How many neutrons are in the nucleus of an atom with an atomic number of 25?

Answer = number of neutrons is 30 (55 -25)

14. What is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons?

Answer = mass number is 7

15. How many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an atomic number of 25?

Answer = number of neutrons is 11 (36 - 25)

In conclusion, the mass number of an atom is the number of protons and neutrons in the nucleus of the an atom.

Learn more about atomic number and mass number at: brainly.com/question/487717

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7 0
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Explanation:

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