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satela [25.4K]
2 years ago
10

Identify the chain isomers, position, functional groups and develop its structure for each one and add its molecular formula.

Chemistry
1 answer:
34kurt2 years ago
4 0

Answer:

position is the last word

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Explanation:

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If 128 molecules of glucoses were covalently joined together, what would be the resulting molecule(s)?
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Polysaccharide.

Explanation:

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Glucose is the hexose sugar made of carbon, hydrogen and oxygen with six carbon atoms. The glucose forms the monomers of carbohydrates. If large amount of glucose molecules combine together they will form the polysaccharides that leads to the carbohydrate formation.

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3 years ago
Which of the following choices would have a positive entropy change?
aalyn [17]

Answer:

  • The option <u><em>B) Fe₂O₃ (s) + 3C(s) → 2Fe(s) + 3CO₂(g),</em></u> because the reactants are only solid units and the products contain gas molecules.

Explanation:

A <em>positive entropy change</em> means that the entropy of the products is greater than the entropy of the reactants.

Entropy in a measure of the radomness or disorder of the system.

Let's see every reaction:

<u />

<u>A) 4NO₂ (g) + 2 H₂O (l) + O₂ (g) → 4 HNO₃ (aq)</u>

Since 5 molecules of a gas (high disorder) combines with 2 molecules of liquid to produce 4 units of aqueous HNO₃ you may expect that the product is more ordered than the reactants, which means that the change in entropy is negative (the entropy decreases).

<u />

<u>B) Fe₂O₃ (s) + 3C(s) → 2Fe(s) + 3CO₂(g)</u>

The left side (reactants) show only solid substances which is a highly ordered arrangement while the right side (products) show the formation a solid (ordered arrangement) and a gas (highly disoredered arrangement), so you can predict the increase of the system entropy, i.e. a positive entropy change.

The <u>equation C)</u> shows the combination of 12 gas molecules to produce 1 solid and 6 gas molecules, so you can expect that the entropy will decrease, i.e. a negative entropy change.

For <u>equation D)</u> the products include solid and gas reactants while the product is just one unit of solid substance, letting you to predict a negative entropy change.

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3 years ago
If a chemical reaction produces 20.0 grams of product, but by stoichiometry it is supposed to have 25.0 grams of product; what i
Vitek1552 [10]
ThThe percentage yield is 80
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2 years ago
HELP PLS WILL GIVE BRAINLIEST AND THANKS
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