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3 years ago

What is an electromagnet? Give three uses of electromagnet?

2 answers:

7 0

Electromagnet - the strong magnetic field produced inside a solenoid can be used to magnetize a piece of magnetic material like soft iron when placed inside the coil. the magnet so formed is called electromagnet. the magnetic effect remains only till the current is flowing through the solenoid.

<h3>Uses of electromagnet</h3>

electromagnet is used in electric bells

electromagnet is used in electric motors electromagnet is used in telephone diagrams

electromagnet is used in for sorting scrap metals

Hope it helps u

Leona [35]3 years ago

4 0

A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

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Dmitri Mendeleev arranged the elements

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3 years ago

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3 years ago

Which type of reactions form salts?

Marysya12 [62]

Answer:

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Explanation:

A neutralization reaction is a reaction between an acid and a base. Products of this type of reaction is water and a salt. The pH of the salt product would depend on how strong or weak the base and acid would be when they react with each other. Although the characteristics of bases and acids are practically polar opposites, when combined, they cancel each other our producing a neutralized product.

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3 years ago

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3 years ago

The heat of combustion of ethane is -337.0kcal at 25 degrees celsius. what is the heat of the reaction when 3g of ethane is burn

Ghella [55]

Answer:

Q = -33.6kcal .

Explanation:

Hello there!

In this case, according to the equation for the calculation of the total heat of reaction when a fixed mass of a fuel like ethane is burnt, we can write:

$Q=n*\Delta _cH$

Whereas n stands for the moles and the other term for the enthalpy of combustion. Thus, for the required total heat of reaction, we first compute the moles of ethane in 3 g as shown below:

$n=3g*\frac{1mol}{30.08g}=0.1mol$

Next, we understand that -337.0kcal is the heat released by the combustion of 1 mole of ethane, therefore, to compute Q, we proceed as follows:

$Q=0.1mol*-337.0\frac{kcal}{mol}\\\\Q=-33.6kcal$

Best regards!

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3 years ago