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morpeh [17]
3 years ago
7

A student makes the following two claims about chemical reactions:

Chemistry
1 answer:
Svet_ta [14]3 years ago
7 0
I would agree with the second one, not the first. You can't always see the chemical reaction, and it isn't always sudden. But the second claim is true. 
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C2h6o how many moles of ethanol are present in a 10.0 g sample of ethanol
Dmitriy789 [7]
46 gram of ethanol ≡ 1 mole of ethanol
1 gram of ethanol ≡ 1/46 mole of ethanol
10 gram of ethanol ≡ 1*10/46 mole of ethanol
                               =0.217 mole of ethanol
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3 years ago
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What explanation accounts for the observation that the mass of the products in reaction #1 (open system) were not equal?
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Answer:

The law of conservation of mass states that matter can not be created or destroyed in a chemical reaction.

Explanation:

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2 years ago
2. 2. Consider the following reaction occurring in a closed chemical system. Assume that this reaction is at equilibrium and tha
Alika [10]

1. This is a combustion reaction.<span>

<span>Combustion reactions can happen with the </span>presence of O</span>₂ <span>gas. O₂<span> reacts with another element or compound and </span></span>oxidize<span> it. Here ethanol reacts with O₂<span> and produces </span></span>CO₂ and H₂O as products.<span> <span>Combustion is also called as </span></span>burning. <span>

2. Reaction will shift to right. <span>

</span><span>If more CH</span>₃CH₂OH is added to the system, then the</span> amount of CH₃CH₂OH will increase.<span> <span>Then the equilibrium in the system </span></span>will be broken.<span> <span>To make the equilibrium again, the </span></span>added CH₃CH₂OH should be removed.<span> To do that system will consume more CH</span>₃CH₂<span>OH to make products which helps to decrease the amount of ethanol. Hence, the reaction will shift to right.<span>

3. The reaction will shift to right.</span><span>

</span><span>If the water is extracted from the system, the </span>amount of water will decrease. <span>That means the </span>amount of products decrease. Then the system will try to gain equilibrium by increasing the water. To increase water the forward reaction should be enhanced. <span>Hence, the</span> reaction will shift to right.<span>

4. The reaction will shift to right.

</span><span>This is an </span>exothermic reaction <span>since it </span>produces heat. If the produced heat is removed, then the system will be cold. To maintain the temperature, system has to increase the amount of heat produced. Then, the forward reaction should be enhanced. Hence, the reaction will shift to right.<span>

5. The Le Chatelier's principle.

</span>Le Chatelier's principle says if a condition changes in a system which was in an equilibrium state, the system will try to gain equilibrium by correcting the changed condition back to normal. Most of industries which make chemicals use this principle</span>

3 0
3 years ago
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Usually, it is observed that climates in coastal regions are moderate as compared to climates in the interiors of continents. Wh
Stella [2.4K]
<span>Answer: option D) Conditions over the oceans change slowly because water takes more time than land to gain or lose heat.

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6. Three ice cubes are placed inside a glass of hot chocolate. Which of the following best
ycow [4]
It’s the first 1 M yea it’s the first one
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