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Alja [10]
3 years ago
11

Please help me ASAP!!

Chemistry
1 answer:
muminat3 years ago
6 0

Answer:

F,Cl,N,I,Se,H

Explanation:

polarity increases as electronegativity increases i guess so that is supposed to be the answer

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Which among the following is/are correct about solution (true solution)?
Sever21 [200]

Answer

A

Explanation

letter a kase tama

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3 years ago
In the presence of dry sulfuric acid at 100 degree c, salicylic acid can react with itself to form a water-insoluble precipitate
Leya [2.2K]
The side reaction will affect the purity and percent yield that, it will decrease the purity and also decrease the present yield.
Due to side reaction, the amount of aspirin which is being produced will be less for some amount of starting material which is used. The present yield will decrease. The insoluble water which is being precipitated is formed as a result of the side-reaction which will remain with aspirin and finally contaminate the aspirin.
The purity of aspirin will also decrease. 
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Something that an animal does that is driven by instinct is called a??
Lunna [17]

Answer:

2. Behavioral Adaption

Explanation:

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5 0
3 years ago
Read 2 more answers
The buffer is prepared by adding 250mL of 0.80M NH3 to 150mL of 0.50M NH4NO3. What is the pH of the final solution (Kb for NH3 =
madam [21]

The pH of the solution is obtained to be 9.67.

<h3>What is a buffer?</h3>

A buffer is a solution that serves to militate against changes in acidity or alkalinity. The buffer is often made of a solution of a strong acid and its salt or a weak base and its salt.

Now we have the that;

Number of moles of base = 250 /1000 *  0.80 = 0.2 moles

Number of moles of salt = 150/1000 *  0.50 = 0.075 moles

Total volume of the solution = 250 + 150 = 400 mL or 0.4 L

Molarity of the base = 0.2 moles/0.4 L = 0.5 M

Molarity of the salt =  0.075 moles/ 0.4 L = 0.1875 M

pKb = - log( 1.8 x 10^-5) = 4.74

pOH = pKb + log [salt/base]

pOH =  4.74 + log (0.1875/ 0.5)

pOH = 4.33

pH = 14 - 4.33

pH = 9.67

The pH of the solution is obtained to be 9.67.

Learn more about pH:brainly.com/question/15289741

#SPJ1

6 0
2 years ago
Which of the following molecules may diffuse freely through a phospholipid bilayer? (select two answers) asparagine, an amino ac
lisabon 2012 [21]

Answer:

testosterone, a steroid hormone

molecular oxygen (O₂)

Explanation:

Phospholipid Bi layer is permeable to some molecules and it will allow them to pass through it freely. Molecules which are soluble in water (polar molecules or hydrophillic molecules) are less permeable through phospholipid Bi layer . In given options Molecular Oxygen and Testosterone( steroid Hormone) are permeable through the layer because of its lipid solubility and size of the molecule .

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