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Molodets [167]
3 years ago
11

Which substance is used to remove rust from metal?

Physics
2 answers:
Vlad [161]3 years ago
7 0

Answer : The correct option is, (B) Hydrochloric acid(HCl)

Explanation :

Rust is an iron oxide, which is formed by the reaction of iron with oxygen in the presence of water.

As we know that the rust is an iron oxide (base) which is removed by an acid.

As per given options, the acid used to remove the rust from the metal is hydrochloric acid and not sulfuric acid because sulfuric acid is an oxidizing agent which oxidizes the metal more.

While the other options, ammonia and sodium hydroxide are a base.

Hence, hydrochloric acid is used to remove rust from metal.

Andreyy893 years ago
3 0
Hydrochloric acid would be the correct answer 

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What is the magnitude of the gravitational force acting on the earth due to the sun?
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Answer: 3.524(10)^{22}N

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According to Newton's law of Gravitation, the force F exerted between two bodies of masses m1 and m2  and separated by a distance r  is equal to the product of their masses and inversely proportional to the square of the distance:

F=G\frac{(m1)(m2)}{r^2}   (1)

Where:

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Substituting the values in (1):

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