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3 years ago

_Fe + _O2 ___Fe2O3

Chemistry

1 answer:

Dafna11 [192]3 years ago

4 0

Answer:

4 Fe + 3 O2 -> 2Fe2O3

Explanation:

For the equation to be balanced with whole numbers, you need to double the amount of Fe2O3. This gives 6 oxygen molecules and 4 Fe molecules.

So the number of atoms will be Fe = 4 and O = 6.

For the visual Model Key, you will most likely have, 4 separate Fe molecules and 3 oxygen molecules (since oxygen exists as a diatomic - 2 oxygen molecules are attached to each other). For Fe2O3 you will have 2 molecules that go O-Fe-O-Fe-O.

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Complete the nuclear equation 42 K → 0 e 19____-1

kenny6666 [7]

Answer:

42 19 K→42 20 Ca+e−

Explanation:

Naturally-occurring potassium atoms have a weighted average atomic mass of 39.10 (as seen on most modern versions of the periodic table.) Each potassium atom contains 19 protons p+ and thus an average potassium atom contains about 39.10−19≈20 neutrons n0.

This particular isotope of potassium-42 contains 42 nucleons (i.e., protons and neutrons, combined;) Like other isotopes of potassium 19 out of these nucleons are protons; the rest 42−19=23 are therefore neutrons.

5 0

3 years ago

Р + 02 = P4O6 balance the equation

sergejj [24]

To balance a chemical equation, both sides should have equal mass, or in other words both sides should have same number of atoms as to follow the conservation of mass rule.

P + O₂ = P₄O₆

LHS:

Number of Phosphorus atoms = 1 atom

Number of Oxygen atoms = 2 atoms

RHS:

Number of Phosphorous atoms = 4 atoms

Number of Oxygen atoms = 6 atoms

Also since P₄O₆ has the most number of atoms we will make the LHS equalize to P₄O₆.

Difference between Phosphorous atoms in LHS to RHS = 3

Since phosphorous is a monatomic we need 3 phosphorous atoms extra

Difference between Oxygen atoms is LHS to RHS = 4

But Oxygen is diatomic, so we need 4/2 = 2 Oxygen molecules

Now lets see if it is balanced

P + 3P + O₂ + 2O₂ -------> P₄O₆

4P + 3O₂ ------> P₄O₆

LHS:

Phosphorous atoms = 4 atoms

Oxygen atoms = 3 × 2 = 6 atoms

RHS:

Phosphorous atoms = 4 atoms

Oxygen atoms = 6 atoms

LHS = RHS

Therefore the balanced equation is 4P + 3O₂ = P₄O₆

Happy to help :)

If you need more explanation or help in any other question, feel free to ask

3 0

3 years ago

Chemical energy is released when molecular bonds are formed. True False

sveticcg [70]

The answer is false

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3 years ago

What would happen if the sand dunes in an area were destroyed?

Komok [63]

Answer:

Our beaches would be unprotected

In the short-term, these artificial sand hills will be destroyed by the elements. Because sand dunes protect inland areas from swells, tides, and winds, they must be protected and defended like national treasures. ... The ocean and the wind can have an unpredictable, destructive force on coastal regions.

- surfertoday

Natural sand dunes play a vital role in protecting our beaches, coastline and coastal developments from coastal hazards such as erosion, coastal flooding and storm damage. Sand dunes protect our shorelines from coastal erosion and provide shelter from the wind and sea spray.

- Waikato Regional Council

3 0

3 years ago

Read 2 more answers

What is the name of the state when electrons absorb energy and move to a higher energy level?

Sergeu [11.5K]

Answer:

Excited State

Explanation:

It's when electrons absorb energy and move to a higher level.

4 0

3 years ago