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Leni [432]
3 years ago
13

State two essential conditions for rusting of iron. List two methods of protecting iron from rusting?​

Mathematics
2 answers:
deff fn [24]3 years ago
8 0
<h3>- - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - </h3>

➷ The presence of Oxygen and the presence of slightly acidic water are essentials for rusting of Iron. To protect Iron from rusting, 'grease coating' can be used. This stops the oxygen and water from being able to make direct contact with the Iron. Also, galvanization can be tried. This is where the Iron is coated in a protective zinc coating to prevent it from rusting.

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ Hannah ♡

spin [16.1K]3 years ago
7 0

Answer:

the rusting of iron would need something very acidic to form iron oxide. and oxygen and water combines which is the process of oxidation.

magnesuim is well known metal that prevent rusting so it would be a great idea to store your iron metal next to a magnesuim metal.  and thats why iron is coated or covered with a metal called zinc it prevents the oxygen and water from entering it.

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The length of a rectangular is 5 centimeters less then it width. The perimeter of the rectangle is 26
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Hi there! :)

<u>Answer:</u>

Length = 4 cm

Width = 9 cm


Step-by-step explanation:

Here's the information we know:

- Perimeter = 26 cm

- Width = x (I just replaced the width by "x" because it's what we are looking for)

- Length = x - 5


Now before we can do anything, you need to know what the formula for the perimeter of a rectangular is:<u> P = (2 × Length) + (2 × Width)</u>

Replace all the information you know in the formula and solve the equation by isolating "x":

P = (2 × Length) + (2 × Width)

26 = ( 2 × (x - 5)) + (<u>2 × x</u>)

Multiply "2" and "x" together → 2 × x = <u>2x</u>

26 = ( <u>2</u>(x - 5)) + 2x

Distribute the "2" to the entire parentheses → 2 × x = <u>2x</u> & 2 × -5 = <u>-10</u>

26 = <u>2x</u> - 10 + <u>2x</u>

Add similar terms together → 2x + 2x = <u>4x</u>

26 = 4x <u>- 10</u>

Add 10 to each side of the equation → 26 + 10 = <u>36</u>

36 = <u>4</u>x

Divide each side of the equation by 4 → 36 ÷ 4 = <u>9</u>

<u>9 = x ⇒ Measure of the width</u>


Since the lenght is 5 centimeter less than the measure of the width, in order to find the measure of the length you'll need to subtract "5" from the measure of the width, which is "9":

9 - 5 = Length rectangle

9 - 5 = <u>4 ⇒ Length rectangle</u>


There you go! I really hope this helped, if there's anything just let me know! :)

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