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vovikov84 [41]
3 years ago
11

Iron can be protected from rusting by coating it in a thin layer of zinc in a process called galvanisation.The zinc layer is oxi

dised instead of the iron.Write out word equations for the oxidation reactions of both iron and zinc.
Iron:
Zinc:
Chemistry
1 answer:
lukranit [14]3 years ago
8 0

Answer:

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron (III) oxide, which we see as rust. Here is the word equation for the reaction: iron + water + oxygen → hydrated iron (III) oxide

In this reaction, zinc atoms each will lose two electrons (oxidation) and become Zn 2+ ions. The two electrons that are released by zinc will be gained by the Cu 2+ ions (reduction). The Cu2+ ions become Cu atoms. Total equation: Zn (s) + CuSO 4 (aq) --> Cu (s) + ZnSO 4 (aq)

Explanation:

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3 years ago
If 0.545J of heat leads to a 0.892 degree C change, what mass of water is present?
jolli1 [7]

Answer:

I got .146 g of water

Explanation:

Refer to this equation:

Q= mcΔt

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4 0
4 years ago
Water is a pure substance. Which of the following is true about water?
Nastasia [14]

Answer:

A chemical change is required to separate the elements present in it.

Explanation:

The only true statement from the choices given is that water as a pure substance requires a chemical change to separate the elements present in it.

Water is a molecule consist of two atoms of hydrogen and one atom of oxygen.

  • The atoms are covalently bonded together.
  • A chemical process, the electrolysis of water is often used to separate the atoms of a water.
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  • Water is a compound which consists of two elements.

Therefore, we see that only the first choice satisfies this problem.

8 0
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