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Ber [7]
3 years ago
10

Why is it important to know what substances you have available to work with, and how they might change, when developing special

effects?
Chemistry
1 answer:
777dan777 [17]3 years ago
4 0

Answer:

sorry if wrong

Explanation:

Develop methods that will enable synthesis of all important molecules in reasonable yields using compact synthetic schemes, so that no useful compound is inaccessible to practical synthesis.

Develop novel transformations that perform with the selectivities typical of enzymatic reactions, so that geometric factors are more important than the intrinsic reactivity of a molecule.

Use computer methods to design important target molecules and design efficient ways to make them.

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Compare the amount of copper predicted in part A with the amount measured in part B. What percentage of the predicted amount was
timofeeve [1]

Answer:

Explanation:

Because the experiment has an different independent and dependent variable and each part has  a different result of what type of copper or what  type of control you are using for you experiment.

PLS MARK BRAINLIEST IF CORRECT I WORKED HARD ON THIS ANSWER,HAVE A NICE DAY/NIGHT <3

4 0
3 years ago
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This is a personal question <br><br> Should I tryout for drumline??
dezoksy [38]

Answer:

Yes

Explanation:

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3 years ago
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Make a He atom with a mass of 4. How many protons did you put in the nucleus?
FrozenT [24]

Answer:

He has two protons

Li electron has one electron in its outermost orbital.

Number of neutrons of nitrogen = seven neutrons

The second shell of boron: 3 electrons.

Explanation:

An atom is composed of electrons, protons and neutrons. The number of neutrons is determined by subtraction of the atomic number from the mass number.

The electronic configuration is already known for each of atoms in these questions according to standard tables.

5 0
3 years ago
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What is an example of an absorbent powder calcium carbonate Kaopectate magnesium and aluminum salts or Esomeprazole. I already t
LenKa [72]

The answer is: Kaopectane.

Kaopectate is a medication for the treatment of mild diarrhea.

First, kaolinite was used as the adsorbent in this medication. Kaolinite is aa layered silicate mineral, with the chemical composition Al₂Si₂O₅(OH)₄.

Now, bismuth subsalicylate is used as the active absorbent in Kaopectate.

Bismuth subsalicylate has the empirical chemical formula of C₇H₅BiO₄.

3 0
3 years ago
and amounts of reactants: 2.01 g salicylic acid + 5.00 mL acetic anhydride (plus 5 drops of 85% phosphoric acid) a) If the densi
irakobra [83]

Answer:

see explanation below

Explanation:

Now. According to the context of this problem, I'm assuming you are doing the synthesis reaction of aspirin, which is a 1:1 ratio and the reaction is:

C7H6O3 + C4H6O3 ------> C9H8O4 + CH3COOH

Now that we know the general reaction, first, let's get the mass of acetic anhydride

m = d*V = 1.08 * 5 = 5.4 g

Now, with the molar mass of each reactants:

MM of SA = 138.12 g/mol

MM of AA = 102.09 g/mol

MM of aspyrin = 180.16 g/mol

Let's calculate now the moles:

moles of SA = 2.01 / 138.12 = 0.015 moles

moles of AA = 5.4 / 102.09 = 0.053 moles

As we can see in the reaction, 1 mole of SA reacts with 1 mole of AA but we have 0.015 of SA and 0.053 of AA, This means that the limiting reagent is the SA, therefore, it will be the first to be consumed in the reaction.

Now the theorical yield of Aspirin is:

m = 0.015 * 180.16 = 2.7024 g

The purpose of the phosphoric acid is to convert the anhydride acetic into an acid form, therefore, the Salycid acid (The OH) can act as nucleophile and react with the carbonile of the anydride. In this way, we can form the aspirin,

6 0
3 years ago
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