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7nadin3 [17]
3 years ago
6

Radio waves are primarily used to

Chemistry
1 answer:
Firlakuza [10]3 years ago
8 0

Answer:

Radio is used primarily for communications including voice, data and entertainment media.

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What type of reaction is represented by the following chemical equation? Explain your answer. Thanks!:)
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DISPLACEMENT REACTION

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The modern model of the atom shows that electrons are:
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In a very violent reaction called a thermite reaction, aluminum metal reacts with iron (III) oxide to form iron metal and alumin
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Here's the equation:
<span>Fe2 O3 + 2Al → 2Fe + Al2 O3 
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Here's the question.
What mass of Al will react with 150g of Fe2 O3? 

<span>In every 2 moles Al you need 1 mole Fe2O3 </span>

<span>moles = mass / molar mass </span>
<span>moles Fe2O3 = 150 g / 159.69 g/mol </span>
<span>= 0.9393 moles </span>

<span>moles Al needed = 2 x moles Fe2O3 </span>
<span>= 2 x 0.9393 mol </span>
<span>= 1.879 moles Al needed </span>

<span>mass = molar mass x moles </span>
<span>mass Al = 26.98 g/mol x 1.879 mol </span>
<span>= 50.69 g </span>
<span>= 51 g (2 sig figs) 
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So the <span>mass of Al that will react with 150g of Fe2 O3 is 51 grams.</span>
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What are the reactants and products when butane combusts with excess oxygen?
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Reactants are substances that?
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A substance that undergoes change during a reaction, usually from coming in contact with another substance
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