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Fynjy0 [20]
3 years ago
7

Help I need an answer today

Chemistry
2 answers:
Ivahew [28]3 years ago
5 0
Here you are! I hope it helps, and also for the ones I put a red ‘x’ it depends on how you round it.

Zinaida [17]3 years ago
4 0

It's the day after... Oops

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Which sample of matter can be seperated into different substances by physical means
Luba_88 [7]
A mixture of matter. A mixture consists of two or more elements physically combined. Take salt water. It is a mixture. So just evaporate the salt water to dryness, it would be separated into salt and water. Hence, mixture can be separatedinto different substances by physical means. You can also use magnet.
8 0
3 years ago
Please Help Me!!
Cerrena [4.2K]

Answer:

1. Galvanic oxidation. Example is the corrosion of aluminium wires when in contact with copper wires under wet conditions.

2. Rainwater or Damp/moist air

3. Chromium-plated steel screws or stainless steel screws or galvanized steel screws

Explanation:

1. Galvanic oxidation or corrosion occurs when two different metals with different electrode potentials are brought into contact with each other by means of an electrolyte (usually a aqueous solution), such that a redox reaction occurs leading to one metal with the more negative electrode potential (the anode) becoming oxidized, while the other less negative potential (the cathode) is reduced.

In order for galvanic corrosion to occur, three elements are required.

i. Two metals with different corrosion potentials (anode and cathode)

ii. Direct metal-to-metal electrical contact

iii. A conductive electrolyte solution (e.g. water) must connect the two metals on a regular basis.

For example oxidation (corrosion) of aluminium wires when in contact with copper wire under wet conditions.

2. The most likely electrolyte will be rainwater containing dissoved solutes (if the panel is in an exposed part of the house) or damp/moist air.

3. From the table, the most likely screw will be chromium-plated steel screws or stainless steel (made of iron and nickel) screws or galvanized steel (zinc-plated) screws.

All these possible screw components have a more negative electrode potential than copper. Thus they will serve as the anode in a galvanic oxidation with copper.

3 0
3 years ago
What is a,well designed experiment called?
adoni [48]

Answer:

controlled experiment

Explanation:

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When elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that
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True i really don’t feel like giving an explanation but trust me it’s trye
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