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Setler [38]
3 years ago
9

What is rust and give two methods that can be usedto prevent ​

Chemistry
2 answers:
SOVA2 [1]3 years ago
4 0

Answer:

rust is a substance formed on iron coated when it reacts with water and its miosture.

two general method are--

1.after u make any object of iron wet make it dry fast.

2. coat its surface with paint or apply grease, oil or varnish.

3.also by Rusting of iron can be prevented by galvanization.

Leona [35]3 years ago
3 0

Answer:

Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances.

Explanation:

Ways to prevent rust are :

Paint It. Paint the bare metal with any durable acrylic paint. ...

Keep Moisture at Bay. Avoid contact with water or moisture. ...

Coat It With Oil. Use of oil or grease significantly reduces the chances of developing rust in iron. ...

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A lead–tin alloy of composition 30 wt% Sn–70 wt% Pb is slowly heated from a temperature of 150°C (300°F).(a) At what temperature
Novay_Z [31]

Answer:

a) 231.9 °C

b) 100% Sn

c) 327.5 °C

d) 100% Pb

Explanation:

This is a mixture of two solids with different fusion point:

Tf_{Pb}=327.5 C

Tf_{Sn}=231.9 C

<u>Given that Sn has a lower fusion temperature it will start to melt first at that temperature. </u>

So the first liquid phase forms at 231.9 °C and because Pb starts melting at a higher temperature, that phase's composition will be 100% Sn.

The mixture will be completely melted when you are a the higher melting temperature of all components (in this case Pb), so it will all in liquid phase at 327.5 °C.

At that temperature all Sn was already in liquid state and, therefore, the last solid's composition will be 100% Pb.

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3 years ago
Lionel has a hot plate, a thermometer, a container of water, a spoon, and a small hammer. Using these tools,
DIA [1.3K]

Answer:

atomic structure

Explanation:

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6 0
3 years ago
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Which of the following would most likely result in an increase in reaction rate? placing the reactants on a hotplate
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placing the reactants on a hot plate

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If the temperature goes up, the reaction rate will increase. Because the particle will move faster and makes the kinetic energy larger.

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Kati was in the kitchen when she heard a crash. She went into her bedroom and found her window broken and a baseball lying on th
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B. inference because she drew a conclusion based on evidence.

Because the evidence was that she heard the crashing sound, and then when she came into her room saw the broken window and baseball.

It was not an observation because she did not directly see the baseball going through the window

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Founders education answer

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